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diff --git a/lib/tools/emacs/erlang.el b/lib/tools/emacs/erlang.el new file mode 100644 index 0000000000..f623e3a1ee --- /dev/null +++ b/lib/tools/emacs/erlang.el @@ -0,0 +1,6651 @@ +;; erlang.el --- Major modes for editing and running Erlang +;; %CopyrightBegin% +;; +;; Copyright Ericsson AB 1996-2009. All Rights Reserved. +;; +;; The contents of this file are subject to the Erlang Public License, +;; Version 1.1, (the "License"); you may not use this file except in +;; compliance with the License. You should have received a copy of the +;; Erlang Public License along with this software. If not, it can be +;; retrieved online at http://www.erlang.org/. +;; +;; Software distributed under the License is distributed on an "AS IS" +;; basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +;; the License for the specific language governing rights and limitations +;; under the License. +;; +;; %CopyrightEnd% +;; +;; Copyright (C) 2004 Free Software Foundation, Inc. +;; Author: Anders Lindgren +;; Keywords: erlang, languages, processes + +;; Lars Thors�n's modifications of 2000-06-07 included. +;; The original version of this package was written by Robert Virding. +;; +;;; Commentary: + +;; Introduction: +;; ------------ +;; +;; This package provides support for the programming language Erlang. +;; The package provides an editing mode with lots of bells and +;; whistles, compilation support, and it makes it possible for the +;; user to start Erlang shells that run inside Emacs. +;; +;; See the Erlang distribution for full documentation of this package. + +;; Installation: +;; ------------ +;; +;; Place this file in Emacs load path, byte-compile it, and add the +;; following line to the appropriate init file: +;; +;; (require 'erlang-start) +;; +;; The full documentation contains much more extensive description of +;; the installation procedure. + +;; Reporting Bugs: +;; -------------- +;; +;; Please send bug reports to the following email address: +;; or if you have a patch suggestion to: +;; Please state as exactly as possible: +;; - Version number of Erlang Mode (see the menu), Emacs, Erlang, +;; and of any other relevant software. +;; - What the expected result was. +;; - What you did, preferably in a repeatable step-by-step form. +;; - A description of the unexpected result. +;; - Relevant pieces of Erlang code causing the problem. +;; - Personal Emacs customisations, if any. +;; +;; Should the Emacs generate an error, please set the Emacs variable +;; `debug-on-error' to `t'. Repeat the error and enclose the debug +;; information in your bug-report. +;; +;; To set the variable you can use the following command: +;; M-x set-variable RET debug-on-error RET t RET +;;; Code: + +;; Variables: + +(defconst erlang-version "2.6.1" + "The version number of Erlang mode.") + +(defvar erlang-root-dir nil + "The directory where the Erlang system is installed. +The name should not contain the trailing slash. + +Should this variable be nil, no manual pages will show up in the +Erlang mode menu.") + +(eval-and-compile + (defconst erlang-emacs-major-version + (if (boundp 'emacs-major-version) + emacs-major-version + (string-match "\\([0-9]+\\)\\.\\([0-9]+\\)" emacs-version) + (erlang-string-to-int (substring emacs-version + (match-beginning 1) (match-end 1)))) + "Major version number of Emacs.")) + +(eval-and-compile + (defconst erlang-emacs-minor-version + (if (boundp 'emacs-minor-version) + emacs-minor-version + (string-match "\\([0-9]+\\)\\.\\([0-9]+\\)" emacs-version) + (erlang-string-to-int (substring emacs-version + (match-beginning 2) (match-end 2)))) + "Minor version number of Emacs.")) + +(defconst erlang-xemacs-p (string-match "Lucid\\|XEmacs" emacs-version) + "Non-nil when running under XEmacs or Lucid Emacs.") + +(defvar erlang-xemacs-popup-menu '("Erlang Mode Commands" . nil) + "Common popup menu for all buffers in Erlang mode. + +This variable is destructively modified every time the Erlang menu +is modified. The effect is that all changes take effect in all +buffers in Erlang mode, just like under GNU Emacs. + +Never EVER set this variable!") + +(defvar erlang-menu-items '(erlang-menu-base-items + erlang-menu-skel-items + erlang-menu-shell-items + erlang-menu-compile-items + erlang-menu-man-items + erlang-menu-personal-items + erlang-menu-version-items) + "*List of menu item list to combine to create Erlang mode menu. + +External programs which temporarily add menu items to the Erlang mode +menu may use this variable. Please use the function `add-hook' to add +items. + +Please call the function `erlang-menu-init' after every change to this +variable.") + +(defvar erlang-menu-base-items + '(("Indent" + (("Indent Line" erlang-indent-command) + ("Indent Region " erlang-indent-region + (if erlang-xemacs-p (mark) mark-active)) + ("Indent Clause" erlang-indent-clause) + ("Indent Function" erlang-indent-function) + ("Indent Buffer" erlang-indent-current-buffer))) + ("Edit" + (("Fill Comment" erlang-fill-paragraph) + ("Comment Region" comment-region + (if erlang-xemacs-p (mark) mark-active)) + ("Uncomment Region" erlang-uncomment-region + (if erlang-xemacs-p (mark) mark-active)) + nil + ("Beginning of Function" erlang-beginning-of-function) + ("End of Function" erlang-end-of-function) + ("Mark Function" erlang-mark-function) + nil + ("Beginning of Clause" erlang-beginning-of-clause) + ("End of Clause" erlang-end-of-clause) + ("Mark Clause" erlang-mark-clause) + nil + ("New Clause" erlang-generate-new-clause) + ("Clone Arguments" erlang-clone-arguments) + nil + ("Align Arrows" erlang-align-arrows))) + ("Syntax Highlighting" + (("Level 4" erlang-font-lock-level-4) + ("Level 3" erlang-font-lock-level-3) + ("Level 2" erlang-font-lock-level-2) + ("Level 1" erlang-font-lock-level-1) + ("Off" erlang-font-lock-level-0))) + ("TAGS" + (("Find Tag" find-tag) + ("Find Next Tag" erlang-find-next-tag) + ;("Find Regexp" find-tag-regexp) + ("Complete Word" erlang-complete-tag) + ("Tags Apropos" tags-apropos) + ("Search Files" tags-search)))) + "Description of menu used in Erlang mode. + +This variable must be a list. The elements are either nil representing +a horizontal line or a list with two or three elements. The first is +the name of the menu item, the second is the function to call, or a +submenu, on the same same form as ITEMS. The third optional argument +is an expression which is evaluated every time the menu is displayed. +Should the expression evaluate to nil the menu item is ghosted. + +Example: + '((\"Func1\" function-one) + (\"SubItem\" + ((\"Yellow\" function-yellow) + (\"Blue\" function-blue))) + nil + (\"Region Function\" spook-function midnight-variable)) + +Call the function `erlang-menu-init' after modifying this variable.") + +(defvar erlang-menu-shell-items + '(nil + ("Shell" + (("Start New Shell" erlang-shell) + ("Display Shell" erlang-shell-display)))) + "Description of the Shell menu used by Erlang mode. + +Please see the documentation of `erlang-menu-base-items'.") + +(defvar erlang-menu-compile-items + '(("Compile" + (("Compile Buffer" erlang-compile) + ("Display Result" erlang-compile-display) + ("Next Error" erlang-next-error)))) + "Description of the Compile menu used by Erlang mode. + +Please see the documentation of `erlang-menu-base-items'.") + +(defvar erlang-menu-version-items + '(nil + ("Version" erlang-version)) + "Description of the version menu used in Erlang mode.") + +(defvar erlang-menu-personal-items nil + "Description of personal menu items used in Erlang mode. + +Please see the variable `erlang-menu-base-items' for a description +of the format.") + +(defvar erlang-menu-man-items nil + "The menu containing man pages. + +The format of the menu should be compatible with `erlang-menu-base-items'. +This variable is added to the list of Erlang menus stored in +`erlang-menu-items'.") + +(defvar erlang-menu-skel-items '() + "Description of the menu containing the skeleton entries. +The menu is in the form described by the variable `erlang-menu-base-items'.") + +(defvar erlang-mode-hook nil + "*Functions to run when Erlang mode is activated. + +This hook is used to change the behaviour of Erlang mode. It is +normally used by the user to personalise the programming environment. +When used in a site init file, it could be used to customise Erlang +mode for all users on the system. + +The functions added to this hook are run every time Erlang mode is +started. See also `erlang-load-hook', a hook which is run once, +when Erlang mode is loaded into Emacs, and `erlang-shell-mode-hook' +which is run every time a new inferior Erlang shell is started. + +To use a hook, create an Emacs lisp function to perform your actions +and add the function to the hook by calling `add-hook'. + +The following example binds the key sequence C-c C-c to the command +`erlang-compile' (normally bound to C-c C-k). The example also +activates Font Lock mode to fontify the buffer and adds a menu +containing all functions defined in the current buffer. + +To use the example, copy the following lines to your `~/.emacs' file: + + (add-hook 'erlang-mode-hook 'my-erlang-mode-hook) + + (defun my-erlang-mode-hook () + (local-set-key \"\\C-c\\C-c\" 'erlang-compile) + (if window-system + (progn + (setq font-lock-maximum-decoration t) + (font-lock-mode 1))) + (if (and window-system (fboundp 'imenu-add-to-menubar)) + (imenu-add-to-menubar \"Imenu\")))") + +(defvar erlang-load-hook nil + "*Functions to run when Erlang mode is loaded. + +This hook is used to change the behaviour of Erlang mode. It is +normally used by the user to personalise the programming environment. +When used in a site init file, it could be used to customize Erlang +mode for all users on the system. + +The difference between this hook and `erlang-mode-hook' and +`erlang-shell-mode-hook' is that the functions in this hook +is only called once, when the Erlang mode is loaded into Emacs +the first time. + +Natural actions for the functions added to this hook are actions which +only should be performed once, and actions which should be performed +before starting Erlang mode. For example, a number of variables are +used by Erlang mode before `erlang-mode-hook' is run. + +The following example sets the variable `erlang-root-dir' so that the +manual pages can be retrieved (note that you must set the value of +`erlang-root-dir' to match the location of Erlang on your system): + + (add-hook 'erlang-load-hook 'my-erlang-load-hook) + + (defun my-erlang-load-hook () + (setq erlang-root-dir \"/usr/local/erlang\"))") + +(defvar erlang-new-file-hook nil + "Functions to run when a new Erlang source file is being edited. + +A useful function is `tempo-template-erlang-normal-header'. +\(This function only exists when the `tempo' package is available.)") + +(defvar erlang-check-module-name 'ask + "*Non-nil means check that module name and file name agrees when saving. + +If the value of this variable is the atom `ask', the user is +prompted. If the value is t the source is silently changed.") + +(defvar erlang-electric-commands + '(erlang-electric-comma + erlang-electric-semicolon + erlang-electric-gt) + "*List of activated electric commands. + +The list should contain the electric commands which should be active. +Currently, the available electric commands are: + `erlang-electric-comma' + `erlang-electric-semicolon' + `erlang-electric-gt' + `erlang-electric-newline' + +Should the variable be bound to t, all electric commands +are activated. + +To deactivate all electric commands, set this variable to nil.") + +(defvar erlang-electric-newline-inhibit t + "*Set to non-nil to inhibit newline after electric command. + +This is useful since a lot of people press return after executing an +electric command. + +In order to work, the command must also be in the +list `erlang-electric-newline-inhibit-list'. + +Note that commands in this list are required to set the variable +`erlang-electric-newline-inhibit' to nil when the newline shouldn't be +inhibited.") + +(defvar erlang-electric-newline-inhibit-list + '(erlang-electric-semicolon + erlang-electric-comma + erlang-electric-gt) + "*Commands which can inhibit the next newline.") + +(defvar erlang-electric-semicolon-insert-blank-lines nil + "*Number of blank lines inserted before header, or nil. + +This variable controls the behaviour of `erlang-electric-semicolon' +when a new function header is generated. When nil, no blank line is +inserted between the current line and the new header. When bound to a +number it represents the number of blank lines which should be +inserted.") + +(defvar erlang-electric-semicolon-criteria + '(erlang-next-lines-empty-p + erlang-at-keyword-end-p + erlang-at-end-of-function-p) + "*List of functions controlling `erlang-electric-semicolon'. +The functions in this list are called, in order, whenever a semicolon +is typed. Each function in the list is called with no arguments, +and should return one of the following values: + + nil -- no determination made, continue checking + 'stop -- do not create prototype for next line + (anything else) -- insert prototype, and stop checking + +If every function in the list is called with no determination made, +then no prototype is inserted. + +The test is performed by the function `erlang-test-criteria-list'.") + +(defvar erlang-electric-comma-criteria + '(erlang-stop-when-inside-argument-list + erlang-stop-when-at-guard + erlang-next-lines-empty-p + erlang-at-keyword-end-p + erlang-at-end-of-clause-p + erlang-at-end-of-function-p) + "*List of functions controlling `erlang-electric-comma'. +The functions in this list are called, in order, whenever a comma +is typed. Each function in the list is called with no arguments, +and should return one of the following values: + + nil -- no determination made, continue checking + 'stop -- do not create prototype for next line + (anything else) -- insert prototype, and stop checking + +If every function in the list is called with no determination made, +then no prototype is inserted. + +The test is performed by the function `erlang-test-criteria-list'.") + +(defvar erlang-electric-arrow-criteria + '(erlang-next-lines-empty-p + erlang-at-end-of-function-p) + "*List of functions controlling the arrow aspect of `erlang-electric-gt'. +The functions in this list are called, in order, whenever a `>' +is typed. Each function in the list is called with no arguments, +and should return one of the following values: + + nil -- no determination made, continue checking + 'stop -- do not create prototype for next line + (anything else) -- insert prototype, and stop checking + +If every function in the list is called with no determination made, +then no prototype is inserted. + +The test is performed by the function `erlang-test-criteria-list'.") + +(defvar erlang-electric-newline-criteria + '(t) + "*List of functions controlling `erlang-electric-newline'. + +The electric newline commands indents the next line. Should the +current line begin with a comment the comment start is copied to +the newly created line. + +The functions in this list are called, in order, whenever a comma +is typed. Each function in the list is called with no arguments, +and should return one of the following values: + + nil -- no determination made, continue checking + 'stop -- do not create prototype for next line + (anything else) -- trigger the electric command. + +If every function in the list is called with no determination made, +then no prototype is inserted. Should the atom t be a member of the +list, it is treated as a function triggering the electric command. + +The test is performed by the function `erlang-test-criteria-list'.") + +(defvar erlang-next-lines-empty-threshold 2 + "*Number of blank lines required to activate an electric command. + +Actually, this value controls the behaviour of the function +`erlang-next-lines-empty-p' which normally is a member of the +criteria lists controlling the electric commands. (Please see +the variables `erlang-electric-semicolon-criteria' and +`erlang-electric-comma-criteria'.) + +The variable is bound to a threshold value, a number, representing the +number of lines which must be empty. + +Setting this variable to zero, electric commands will always be +triggered by `erlang-next-lines-empty-p', unless inhibited by other +rules. + +Should this variable be nil, `erlang-next-lines-empty-p' will never +trigger an electric command. The same effect would be reached if the +function `erlang-next-lines-empty-p' would be removed from the criteria +lists. + +Note that even if `erlang-next-lines-empty-p' should not trigger an +electric command, other functions in the criteria list could.") + +(defvar erlang-new-clause-with-arguments nil + "*Non-nil means that the arguments are cloned when a clause is generated. + +A new function header can be generated by calls to the function +`erlang-generate-new-clause' and by use of the electric semicolon.") + +(defvar erlang-compile-use-outdir t + "*When nil, go to the directory containing source file when compiling. + +This is a workaround for a bug in the `outdir' option of compile. If the +outdir is not in the current load path, Erlang doesn't load the object +module after it has been compiled. + +To activate the workaround, place the following in your `~/.emacs' file: + (setq erlang-compile-use-outdir nil)") + +(defvar erlang-indent-level 4 + "*Indentation of Erlang calls/clauses within blocks.") + +(defvar erlang-indent-guard 2 + "*Indentation of Erlang guards.") + +(defvar erlang-argument-indent 2 + "*Indentation of the first argument in a function call. +When nil, indent to the column after the `(' of the +function.") + +(defvar erlang-tab-always-indent t + "*Non-nil means TAB in Erlang mode should always re-indent the current line, +regardless of where in the line point is when the TAB command is used.") + +(defvar erlang-error-regexp-alist + '(("^\\([^:( \t\n]+\\)[:(][ \t]*\\([0-9]+\\)[:) \t]" . (1 2))) + "*Patterns for matching Erlang errors.") + +(defvar erlang-man-inhibit (eq system-type 'windows-nt) + "Inhibit the creation of the Erlang Manual Pages menu. + +The Windows distribution of Erlang does not include man pages, hence +there is no attempt to create the menu.") + +(defvar erlang-man-dirs + '(("Man - Commands" "/man/man1" t) + ("Man - Modules" "/man/man3" t) + ("Man - Files" "/man/man4" t) + ("Man - Applications" "/man/man6" t)) + "*The man directories displayed in the Erlang menu. + +Each item in the list should be a list with three elements, the first +the name of the menu, the second the directory, and the last a flag. +Should the flag the nil, the directory is absolute, should it be non-nil +the directory is relative to the variable `erlang-root-dir'.") + +(defvar erlang-man-max-menu-size 35 + "*The maximum number of menu items in one menu allowed.") + +(defvar erlang-man-display-function 'erlang-man-display + "*Function used to display man page. + +The function is called with one argument, the name of the file +containing the man page. Use this variable when the default +function, `erlang-man-display', does not work on your system.") + +(defvar erlang-compile-extra-opts '() + "*Additional options to the compilation command. +This is an elisp list of options. Each option can be either: +- an atom +- a dotted pair +- a string +Example: '(bin_opt_info (i . \"/path1/include\") (i . \"/path2/include\"))") + +(eval-and-compile + (defvar erlang-regexp-modern-p + (if (> erlang-emacs-major-version 21) t nil) + "Non-nil when this version of Emacs uses a modern version of regexp. +Supporting \_< and \_> This is determined by checking the version of Emacs used.")) + +(eval-and-compile + (defconst erlang-atom-quoted-regexp + "'\\(?:[^\\']\\|\\(?:\\\\.\\)\\)*'" + "Regexp describing a single-quoted atom")) + +(eval-and-compile + (defconst erlang-atom-regular-regexp + (if erlang-regexp-modern-p + "\\_<[[:lower:]]\\(?:\\sw\\|\\s_\\)*\\_>" + "\\<[[:lower:]]\\(?:\\sw\\|\\s_\\)*\\>") + "Regexp describing a regular (non-quoted) atom")) + +(eval-and-compile + (defconst erlang-atom-regexp + (concat "\\(" erlang-atom-quoted-regexp "\\|" + erlang-atom-regular-regexp "\\)") + "Regexp describing an Erlang atom.")) + +(eval-and-compile + (defconst erlang-atom-regexp-matches 1 + "Number of regexp parenthesis pairs in `erlang-atom-regexp'. + +This is used to determine parenthesis matches in complex regexps which +contains `erlang-atom-regexp'.")) + + +(eval-and-compile + (defconst erlang-variable-regexp + (if erlang-regexp-modern-p + "\\_<\\([[:upper:]_]\\(?:\\sw\\|\\s_\\)*\\)\\_>" + "\\<\\([[:upper:]_]\\(?:\\sw\\|\\s_\\)*\\)\\>") + "Regexp which should match an Erlang variable. + +The regexp must be surrounded with a pair of regexp parentheses.")) + +(eval-and-compile + (defconst erlang-variable-regexp-matches 1 + "Number of regexp parenthesis pairs in `erlang-variable-regexp'. + +This is used to determine matches in complex regexps which contains +`erlang-variable-regexp'.")) + + +(eval-and-compile + (defun erlang-regexp-opt (strings &optional paren) + "Like `regexp-opt', except if PAREN is `symbols', then the +resulting regexp is surrounded by \\_< and \\_>." + (if (eq paren 'symbols) + (if erlang-regexp-modern-p + (concat "\\_<" (regexp-opt strings t) "\\_>") + (concat "\\<" (regexp-opt strings t) "\\>")) + (regexp-opt strings paren)))) + + +(eval-and-compile + (defvar erlang-keywords + '("after" + "begin" + "catch" + "case" + "cond" + "end" + "fun" + "if" + "let" + "of" + "query" + "receive" + "try" + "when") + "Erlang reserved keywords")) + +(eval-and-compile + (defconst erlang-keywords-regexp (erlang-regexp-opt erlang-keywords 'symbols))) + +(eval-and-compile + (defvar erlang-operators + '("and" + "andalso" + "band" + "bnot" + "bor" + "bsl" + "bsr" + "bxor" + "div" + "not" + "or" + "orelse" + "rem" + "xor") + "Erlang operators")) +;; What about these? +;; '+' '-' '*' '/' '>', '>=', '<', '=<', '=:=', '==', '=/=', '/=' + +(eval-and-compile + (defconst erlang-operators-regexp (erlang-regexp-opt erlang-operators 'symbols))) + + +(eval-and-compile + (defvar erlang-guards + '("is_atom" + "is_binary" + "is_bitstring" + "is_boolean" + "is_float" + "is_function" + "is_integer" + "is_list" + "is_number" + "is_pid" + "is_port" + "is_record" + "is_reference" + "is_tuple" + "atom" + "binary" + "bitstring" + "boolean" + ;;"float" ; Not included to avoid clashes with the bif float/1 + "function" + "integer" + "list" + "number" + "pid" + "port" + "record" + "reference" + "tuple") + "Erlang guards")) + +(eval-and-compile + (defconst erlang-guards-regexp (erlang-regexp-opt erlang-guards 'symbols))) + + +(eval-and-compile + (defvar erlang-predefined-types + '("any" + "arity" + "byte" + "char" + "cons" + "deep_string" + "maybe_improper_list" + "mfa" + "nil" + "none" + "non_neg_integer" + "nonempty_list" + "nonempty_improper_list" + "nonempty_maybe_improper_list" + "string" + "timeout") + "Erlang type specs types")) + +(eval-and-compile + (defconst erlang-predefined-types-regexp + (erlang-regexp-opt erlang-predefined-types 'symbols))) + + +(eval-and-compile + (defvar erlang-int-bifs + '("abs" + "adler32" + "adler32_combine" + "alive" + "apply" + "atom_to_binary" + "atom_to_list" + "binary_to_atom" + "binary_to_existing_atom" + "binary_to_list" + "binary_to_term" + "bit_size" + "bitstring_to_list" + "byte_size" + "check_process_code" + "contact_binary" + "crc32" + "crc32_combine" + "date" + "decode_packet" + "delete_module" + "disconnect_node" + "element" + "erase" + "exit" + "float" + "float_to_list" + "garbage_collect" + "get" + "get_keys" + "group_leader" + "halt" + "hd" + "integer_to_list" + "internal_bif" + "iolist_size" + "iolist_to_binary" + "is_alive" + "is_atom" + "is_binary" + "is_bitstring" + "is_boolean" + "is_float" + "is_function" + "is_integer" + "is_list" + "is_number" + "is_pid" + "is_port" + "is_process_alive" + "is_record" + "is_reference" + "is_tuple" + "length" + "link" + "list_to_atom" + "list_to_binary" + "list_to_bitstring" + "list_to_existing_atom" + "list_to_float" + "list_to_integer" + "list_to_pid" + "list_to_tuple" + "load_module" + "make_ref" + "module_loaded" + "monitor_node" + "node" + "node_link" + "node_unlink" + "nodes" + "notalive" + "now" + "open_port" + "pid_to_list" + "port_close" + "port_command" + "port_connect" + "port_control" + "pre_loaded" + "process_flag" + "process_info" + "processes" + "purge_module" + "put" + "register" + "registered" + "round" + "self" + "setelement" + "size" + "spawn" + "spawn_link" + "spawn_monitor" + "spawn_opt" + "split_binary" + "statistics" + "term_to_binary" + "time" + "throw" + "tl" + "trunc" + "tuple_size" + "tuple_to_list" + "unlink" + "unregister" + "whereis") + "Erlang built-in functions (BIFs)")) + +(eval-and-compile + (defconst erlang-int-bif-regexp (erlang-regexp-opt erlang-int-bifs 'symbols))) + + +(eval-and-compile + (defvar erlang-ext-bifs + '("append_element" + "bump_reductions" + "cancel_timer" + "demonitor" + "display" + "fun_info" + "fun_to_list" + "function_exported" + "get_cookie" + "get_stacktrace" + "hash" + "integer_to_list" + "is_builtin" + "list_to_integer" + "loaded" + "localtime" + "localtime_to_universaltime" + "make_tuple" + "max" + "md5" + "md5_final" + "md5_init" + "md5_update" + "memory" + "min" + "monitor" + "monitor_node" + "phash" + "phash2" + "port_call" + "port_info" + "port_to_list" + "ports" + "process_display" + "read_timer" + "ref_to_list" + "resume_process" + "send" + "send_after" + "send_nosuspend" + "set_cookie" + "start_timer" + "suspend_process" + "system_flag" + "system_info" + "system_monitor" + "system_profile" + "trace" + "trace_delivered" + "trace_info" + "trace_pattern" + "universaltime" + "universaltime_to_localtime" + "yield") + "Erlang built-in functions (BIFs) that needs erlang: prefix")) + +(eval-and-compile + (defconst erlang-ext-bif-regexp + (erlang-regexp-opt (append erlang-int-bifs erlang-ext-bifs) 'symbols))) + + +(defvar erlang-defun-prompt-regexp (concat "^" erlang-atom-regexp "\\s *(") + "Regexp which should match beginning of a clause.") + +(defvar erlang-file-name-extension-regexp "\\.[eh]rl$" + "*Regexp which should match an Erlang file name. + +This regexp is used when an Erlang module name is extracted from the +name of an Erlang source file. + +The regexp should only match the section of the file name which should +be excluded from the module name. + +To match all files set this variable to \"\\\\(\\\\..*\\\\|\\\\)$\". +The matches all except the extension. This is useful if the Erlang +tags system should interpret tags on the form `module:tag' for +files written in other languages than Erlang.") + +(defvar erlang-inferior-shell-split-window t + "*If non-nil, when starting an inferior shell, split windows. +If nil, the inferior shell replaces the window. This is the traditional +behaviour.") + +(defvar erlang-mode-map nil + "*Keymap used in Erlang mode.") +(defvar erlang-mode-abbrev-table nil + "Abbrev table in use in Erlang-mode buffers.") +(defvar erlang-mode-syntax-table nil + "Syntax table in use in Erlang-mode buffers.") + +(defconst inferior-erlang-use-cmm (boundp 'minor-mode-overriding-map-alist) + "Non-nil means use `compilation-minor-mode' in Erlang shell.") + +;; Tempo skeleton templates: + +(defvar erlang-tempo-tags nil + "Tempo tags for erlang mode") + +(defvar erlang-skel + '(("If" "if" erlang-skel-if) + ("Case" "case" erlang-skel-case) + ("Receive" "receive" erlang-skel-receive) + ("Receive After" "after" erlang-skel-receive-after) + ("Receive Loop" "loop" erlang-skel-receive-loop) + ("Module" "module" erlang-skel-module) + ("Author" "author" erlang-skel-author) + () + ("Small Header" "small-header" + erlang-skel-small-header erlang-skel-header) + ("Normal Header" "normal-header" + erlang-skel-normal-header erlang-skel-header) + ("Large Header" "large-header" + erlang-skel-large-header erlang-skel-header) + () + ("Small Server" "small-server" + erlang-skel-small-server erlang-skel-header) + () + ("Application" "application" + erlang-skel-application erlang-skel-header) + ("Supervisor" "supervisor" + erlang-skel-supervisor erlang-skel-header) + ("supervisor_bridge" "supervisor-bridge" + erlang-skel-supervisor-bridge erlang-skel-header) + ("gen_server" "generic-server" + erlang-skel-generic-server erlang-skel-header) + ("gen_event" "gen-event" + erlang-skel-gen-event erlang-skel-header) + ("gen_fsm" "gen-fsm" + erlang-skel-gen-fsm erlang-skel-header) + ("Library module" "gen-lib" + erlang-skel-lib erlang-skel-header) + ("Corba callback" "gen-corba-cb" + erlang-skel-corba-callback erlang-skel-header) + ("Small Common Test suite" "ct-test-suite-s" + erlang-skel-ct-test-suite-s erlang-skel-header) + ("Large Common Test suite" "ct-test-suite-l" + erlang-skel-ct-test-suite-l erlang-skel-header) + ("Erlang TS test suite" "ts-test-suite" + erlang-skel-ts-test-suite erlang-skel-header) + ) + "*Description of all skeleton templates. +Both functions and menu entries will be created. + +Each entry in `erlang-skel' should be a list with three or four +elements, or the empty list. + +The first element is the name which shows up in the menu. The second +is the `tempo' identifier (The string \"erlang-\" will be added in +front of it). The third is the skeleton descriptor, a variable +containing `tempo' attributes as described in the function +`tempo-define-template'. The optional fourth elements denotes a +function which should be called when the menu is selected. + +Functions corresponding to every template will be created. The name +of the function will be `tempo-template-erlang-X' where `X' is the +tempo identifier as specified in the second argument of the elements +in this list. + +A list with zero elements means that the a horizontal line should +be placed in the menu.") + +;; In XEmacs `user-mail-address' returns "[email protected] (Foo Bar)" ARGH! +;; What's wrong with that? RFC 822 says it's legal. [sverkerw] +;; This needs to use the customized value. If that's not sane, things like +;; add-log will lose anyhow. Avoid it if there _is_ a paren. +(defvar erlang-skel-mail-address + (if (or (not user-mail-address) (string-match "(" user-mail-address)) + (concat (user-login-name) "@" + (or (and (boundp 'mail-host-address) + mail-host-address) + (system-name))) + user-mail-address) + "Mail address of the user.") + +;; Expression templates: +(defvar erlang-skel-case + '((erlang-skel-skip-blank) o > + "case " p " of" n> p "_ ->" n> p "ok" n> "end" p) + "*The skeleton of a `case' expression. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-if + '((erlang-skel-skip-blank) o > + "if" n> p " ->" n> p "ok" n> "end" p) + "The skeleton of an `if' expression. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-receive + '((erlang-skel-skip-blank) o > + "receive" n> p "_ ->" n> p "ok" n> "end" p) + "*The skeleton of a `receive' expression. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-receive-after + '((erlang-skel-skip-blank) o > + "receive" n> p "_ ->" n> p "ok" n> "after " p "T ->" n> + p "ok" n> "end" p) + "*The skeleton of a `receive' expression with an `after' clause. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-receive-loop + '(& o "loop(" p ") ->" n> "receive" n> p "_ ->" n> + "loop(" p ")" n> "end.") + "*The skeleton of a simple `receive' loop. +Please see the function `tempo-define-template'.") + + +;; Attribute templates + +(defvar erlang-skel-module + '(& "-module(" + (erlang-add-quotes-if-needed (erlang-get-module-from-file-name)) + ")." n) + "*The skeleton of a `module' attribute. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-author + '(& "-author('" erlang-skel-mail-address "')." n) + "*The skeleton of a `author' attribute. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-vc nil + "*The skeleton template to generate a version control attribute. +The default is to insert nothing. Example of usage: + + (setq erlang-skel-vc '(& \"-rcs(\\\"$\Id: $ \\\").\") n) + +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-export + '(& "-export([" n> "])." n) + "*The skeleton of an `export' attribute. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-import + '(& "%%-import(Module, [Function/Arity, ...])." n) + "*The skeleton of an `import' attribute. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-compile nil + ;; '(& "%%-compile(export_all)." n) + "*The skeleton of a `compile' attribute. +Please see the function `tempo-define-template'.") + + +;; Comment templates. + +(defvar erlang-skel-date-function 'erlang-skel-dd-mmm-yyyy + "*Function which returns date string. +Look in the module `time-stamp' for a battery of functions.") + +(defvar erlang-skel-copyright-comment '() + "*The template for a copyright line in the header, normally empty. +This variable should be bound to a `tempo' template, for example: + '(& \"%%% Copyright (C) 2000, Yoyodyne, Inc.\" n) + +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-created-comment + '(& "%%% Created : " (funcall erlang-skel-date-function) " by " + (user-full-name) " <" erlang-skel-mail-address ">" n) + "*The template for the \"Created:\" comment line.") + +(defvar erlang-skel-author-comment + '(& "%%% Author : " (user-full-name) " <" erlang-skel-mail-address ">" n) + "*The template for creating the \"Author:\" line in the header. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-file-comment + '(& "%%% File : " (file-name-nondirectory buffer-file-name) n) +"*The template for creating the \"Module:\" line in the header. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-small-header + '(o (erlang-skel-include erlang-skel-module) + ;; erlang-skel-author) + n + (erlang-skel-include erlang-skel-compile + ;; erlang-skel-export + erlang-skel-vc)) + "*The template of a small header without any comments. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-normal-header + '(o (erlang-skel-include erlang-skel-copyright-comment + erlang-skel-file-comment + erlang-skel-author-comment) + "%%% Description : " p n + (erlang-skel-include erlang-skel-created-comment) n + (erlang-skel-include erlang-skel-small-header) n) + "*The template of a normal header. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-large-header + '(o (erlang-skel-separator) + (erlang-skel-include erlang-skel-copyright-comment + erlang-skel-file-comment + erlang-skel-author-comment) + "%%% Description : " p n + "%%%" n + (erlang-skel-include erlang-skel-created-comment) + (erlang-skel-separator) + (erlang-skel-include erlang-skel-small-header) ) + "*The template of a large header. +Please see the function `tempo-define-template'.") + + +;; Server templates. + +(defvar erlang-skel-small-server + '((erlang-skel-include erlang-skel-large-header) + "-export([start/0,init/1])." n n n + "start() ->" n> "spawn(" (erlang-get-module-from-file-name) + ", init, [self()])." n n + "init(From) ->" n> + "loop(From)." n n + "loop(From) ->" n> + "receive" n> + p "_ ->" n> + "loop(From)" n> + "end." + ) + "*Template of a small server. +Please see the function `tempo-define-template'.") + +;; Behaviour templates. + +(defvar erlang-skel-application + '((erlang-skel-include erlang-skel-large-header) + "-behaviour(application)." n n + "%% Application callbacks" n + "-export([start/2, stop/1])." n n + (erlang-skel-double-separator 2) + "%% Application callbacks" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Function: start(Type, StartArgs) -> {ok, Pid} |" n + "%% {ok, Pid, State} |" n + "%% {error, Reason}" n + "%% Description: This function is called whenever an application " n + "%% is started using application:start/1,2, and should start the processes" n + "%% of the application. If the application is structured according to the" n + "%% OTP design principles as a supervision tree, this means starting the" n + "%% top supervisor of the tree." n + (erlang-skel-separator 2) + "start(_Type, StartArgs) ->" n> + "case 'TopSupervisor':start_link(StartArgs) of" n> + "{ok, Pid} -> " n> + "{ok, Pid};" n> + "Error ->" n> + "Error" n> + "end." n + n + (erlang-skel-separator 2) + "%% Function: stop(State) -> void()" n + "%% Description: This function is called whenever an application" n + "%% has stopped. It is intended to be the opposite of Module:start/2 and" n + "%% should do any necessary cleaning up. The return value is ignored. "n + (erlang-skel-separator 2) + "stop(_State) ->" n> + "ok." n + n + (erlang-skel-double-separator 2) + "%% Internal functions" n + (erlang-skel-double-separator 2) + ) + "*The template of an application behaviour. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-supervisor + '((erlang-skel-include erlang-skel-large-header) + "-behaviour(supervisor)." n n + + "%% API" n + "-export([start_link/0])." n n + + "%% Supervisor callbacks" n + "-export([init/1])." n n + + "-define(SERVER, ?MODULE)." n n + + (erlang-skel-double-separator 2) + "%% API functions" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Function: start_link() -> {ok,Pid} | ignore | {error,Error}" n + "%% Description: Starts the supervisor" n + (erlang-skel-separator 2) + "start_link() ->" n> + "supervisor:start_link({local, ?SERVER}, ?MODULE, [])." n + n + (erlang-skel-double-separator 2) + "%% Supervisor callbacks" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Func: init(Args) -> {ok, {SupFlags, [ChildSpec]}} |" n + "%% ignore |" n + "%% {error, Reason}" n + "%% Description: Whenever a supervisor is started using "n + "%% supervisor:start_link/[2,3], this function is called by the new process "n + "%% to find out about restart strategy, maximum restart frequency and child "n + "%% specifications." n + (erlang-skel-separator 2) + "init([]) ->" n> + "AChild = {'AName',{'AModule',start_link,[]}," n> + "permanent,2000,worker,['AModule']}," n> + "{ok,{{one_for_all,0,1}, [AChild]}}." n + n + (erlang-skel-double-separator 2) + "%% Internal functions" n + (erlang-skel-double-separator 2) + ) + "*The template of an supervisor behaviour. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-supervisor-bridge + '((erlang-skel-include erlang-skel-large-header) + "-behaviour(supervisor_bridge)." n n + + "%% API" n + "-export([start_link/0])." n n + + "%% supervisor_bridge callbacks" n + "-export([init/1, terminate/2])." n n + + "-define(SERVER, ?MODULE)." n n + + "-record(state, {})." n n + + (erlang-skel-double-separator 2) + "%% API" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Function: start_link() -> {ok,Pid} | ignore | {error,Error}" n + "%% Description: Starts the supervisor bridge" n + (erlang-skel-separator 2) + "start_link() ->" n> + "supervisor_bridge:start_link({local, ?SERVER}, ?MODULE, [])." n + n + (erlang-skel-double-separator 2) + "%% supervisor_bridge callbacks" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Funcion: init(Args) -> {ok, Pid, State} |" n + "%% ignore |" n + "%% {error, Reason} " n + "%% Description:Creates a supervisor_bridge process, linked to the calling" n + "%% process, which calls Module:init/1 to start the subsystem. To ensure a" n + "%% synchronized start-up procedure, this function does not return until" n + "%% Module:init/1 has returned. " n + (erlang-skel-separator 2) + "init([]) ->" n> + "case 'AModule':start_link() of" n> + "{ok, Pid} ->" n> + "{ok, Pid, #state{}};" n> + "Error ->" n> + "Error" n> + "end." n + n + (erlang-skel-separator 2) + "%% Func: terminate(Reason, State) -> void()" n + "%% Description:This function is called by the supervisor_bridge when it is"n + "%% about to terminate. It should be the opposite of Module:init/1 and stop"n + "%% the subsystem and do any necessary cleaning up.The return value is ignored." + (erlang-skel-separator 2) + "terminate(Reason, State) ->" n> + "'AModule':stop()," n> + "ok." n + n + (erlang-skel-double-separator 2) + "%% Internal functions" n + (erlang-skel-double-separator 2) + ) + "*The template of an supervisor_bridge behaviour. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-generic-server + '((erlang-skel-include erlang-skel-large-header) + "-behaviour(gen_server)." n n + + "%% API" n + "-export([start_link/0])." n n + + "%% gen_server callbacks" n + "-export([init/1, handle_call/3, handle_cast/2, " + "handle_info/2," n> + "terminate/2, code_change/3])." n n + + "-record(state, {})." n n + + (erlang-skel-double-separator 2) + "%% API" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Function: start_link() -> {ok,Pid} | ignore | {error,Error}" n + "%% Description: Starts the server" n + (erlang-skel-separator 2) + "start_link() ->" n> + "gen_server:start_link({local, ?SERVER}, ?MODULE, [], [])." n + n + (erlang-skel-double-separator 2) + "%% gen_server callbacks" n + (erlang-skel-double-separator 2) + n + (erlang-skel-separator 2) + "%% Function: init(Args) -> {ok, State} |" n + "%% {ok, State, Timeout} |" n + "%% ignore |" n + "%% {stop, Reason}" n + "%% Description: Initiates the server" n + (erlang-skel-separator 2) + "init([]) ->" n> + "{ok, #state{}}." n + n + (erlang-skel-separator 2) + "%% Function: " + "%% handle_call(Request, From, State) -> {reply, Reply, State} |" n + "%% {reply, Reply, State, Timeout} |" n + "%% {noreply, State} |" n + "%% {noreply, State, Timeout} |" n + "%% {stop, Reason, Reply, State} |" n + "%% {stop, Reason, State}" n + "%% Description: Handling call messages" n + (erlang-skel-separator 2) + "handle_call(_Request, _From, State) ->" n> + "Reply = ok," n> + "{reply, Reply, State}." n + n + (erlang-skel-separator 2) + "%% Function: handle_cast(Msg, State) -> {noreply, State} |" n + "%% {noreply, State, Timeout} |" n + "%% {stop, Reason, State}" n + "%% Description: Handling cast messages" n + + (erlang-skel-separator 2) + "handle_cast(_Msg, State) ->" n> + "{noreply, State}." n + n + (erlang-skel-separator 2) + "%% Function: handle_info(Info, State) -> {noreply, State} |" n + "%% {noreply, State, Timeout} |" n + "%% {stop, Reason, State}" n + "%% Description: Handling all non call/cast messages" n + (erlang-skel-separator 2) + "handle_info(_Info, State) ->" n> + "{noreply, State}." n + n + (erlang-skel-separator 2) + "%% Function: terminate(Reason, State) -> void()" n + "%% Description: This function is called by a gen_server when it is about to"n + "%% terminate. It should be the opposite of Module:init/1 and do any necessary"n + "%% cleaning up. When it returns, the gen_server terminates with Reason." n + "%% The return value is ignored." n + + (erlang-skel-separator 2) + "terminate(_Reason, _State) ->" n> + "ok." n + n + (erlang-skel-separator 2) + "%% Func: code_change(OldVsn, State, Extra) -> {ok, NewState}" n + "%% Description: Convert process state when code is changed" n + (erlang-skel-separator 2) + "code_change(_OldVsn, State, _Extra) ->" n> + "{ok, State}." n + n + (erlang-skel-separator 2) + "%%% Internal functions" n + (erlang-skel-separator 2) + ) + "*The template of a generic server. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-gen-event + '((erlang-skel-include erlang-skel-large-header) + "-behaviour(gen_event)." n + + "%% API" n + "-export([start_link/0, add_handler/0])." n n + + "%% gen_event callbacks" n + "-export([init/1, handle_event/2, handle_call/2, " n> + "handle_info/2, terminate/2, code_change/3])." n n + + "-record(state, {})." n n + + (erlang-skel-double-separator 2) + "%% gen_event callbacks" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Function: start_link() -> {ok,Pid} | {error,Error} " n + "%% Description: Creates an event manager." n + (erlang-skel-separator 2) + "start_link() ->" n> + "gen_event:start_link({local, ?SERVER}). " n + n + (erlang-skel-separator 2) + "%% Function: add_handler() -> ok | {'EXIT',Reason} | term()" n + "%% Description: Adds an event handler" n + (erlang-skel-separator 2) + "add_handler() ->" n> + "gen_event:add_handler(?SERVER, ?MODULE, [])." n + n + (erlang-skel-double-separator 2) + "%% gen_event callbacks" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Function: init(Args) -> {ok, State}" n + "%% Description: Whenever a new event handler is added to an event manager,"n + "%% this function is called to initialize the event handler." n + (erlang-skel-separator 2) + "init([]) ->" n> + "{ok, #state{}}." n + n + (erlang-skel-separator 2) + "%% Function: "n + "%% handle_event(Event, State) -> {ok, State} |" n + "%% {swap_handler, Args1, State1, Mod2, Args2} |"n + "%% remove_handler" n + "%% Description:Whenever an event manager receives an event sent using"n + "%% gen_event:notify/2 or gen_event:sync_notify/2, this function is called for"n + "%% each installed event handler to handle the event. "n + (erlang-skel-separator 2) + "handle_event(_Event, State) ->" n> + "{ok, State}." n + n + (erlang-skel-separator 2) + "%% Function: " n + "%% handle_call(Request, State) -> {ok, Reply, State} |" n + "%% {swap_handler, Reply, Args1, State1, "n + "%% Mod2, Args2} |" n + "%% {remove_handler, Reply}" n + "%% Description: Whenever an event manager receives a request sent using"n + "%% gen_event:call/3,4, this function is called for the specified event "n + "%% handler to handle the request."n + (erlang-skel-separator 2) + "handle_call(_Request, State) ->" n> + "Reply = ok," n> + "{ok, Reply, State}." n + n + (erlang-skel-separator 2) + "%% Function: " n + "%% handle_info(Info, State) -> {ok, State} |" n + "%% {swap_handler, Args1, State1, Mod2, Args2} |" n + "%% remove_handler" n + "%% Description: This function is called for each installed event handler when"n + "%% an event manager receives any other message than an event or a synchronous"n + "%% request (or a system message)."n + (erlang-skel-separator 2) + "handle_info(_Info, State) ->" n> + "{ok, State}." n + n + (erlang-skel-separator 2) + "%% Function: terminate(Reason, State) -> void()" n + "%% Description:Whenever an event handler is deleted from an event manager,"n + "%% this function is called. It should be the opposite of Module:init/1 and "n + "%% do any necessary cleaning up. " n + (erlang-skel-separator 2) + "terminate(_Reason, _State) ->" n> + "ok." n + n + (erlang-skel-separator 2) + "%% Function: code_change(OldVsn, State, Extra) -> {ok, NewState} " n + "%% Description: Convert process state when code is changed" n + (erlang-skel-separator 2) + "code_change(_OldVsn, State, _Extra) ->" n> + "{ok, State}." n + n + (erlang-skel-separator 2) + "%%% Internal functions" n + (erlang-skel-separator 2) + ) + "*The template of a gen_event. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-gen-fsm + '((erlang-skel-include erlang-skel-large-header) + "-behaviour(gen_fsm)." n n + + "%% API" n + "-export([start_link/0])." n n + + "%% gen_fsm callbacks" n + "-export([init/1, state_name/2, state_name/3, handle_event/3," n> + "handle_sync_event/4, handle_info/3, terminate/3, code_change/4])." n n + + "-record(state, {})." n n + + (erlang-skel-double-separator 2) + "%% API" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Function: start_link() -> ok,Pid} | ignore | {error,Error}" n + "%% Description:Creates a gen_fsm process which calls Module:init/1 to"n + "%% initialize. To ensure a synchronized start-up procedure, this function" n + "%% does not return until Module:init/1 has returned. " n + (erlang-skel-separator 2) + "start_link() ->" n> + "gen_fsm:start_link({local, ?SERVER}, ?MODULE, [], [])." n + n + (erlang-skel-double-separator 2) + "%% gen_fsm callbacks" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Function: init(Args) -> {ok, StateName, State} |" n + "%% {ok, StateName, State, Timeout} |" n + "%% ignore |" n + "%% {stop, StopReason} " n + "%% Description:Whenever a gen_fsm is started using gen_fsm:start/[3,4] or"n + "%% gen_fsm:start_link/3,4, this function is called by the new process to "n + "%% initialize. " n + (erlang-skel-separator 2) + "init([]) ->" n> + "{ok, state_name, #state{}}." n + n + (erlang-skel-separator 2) + "%% Function: "n + "%% state_name(Event, State) -> {next_state, NextStateName, NextState}|" n + "%% {next_state, NextStateName, " n + "%% NextState, Timeout} |" n + "%% {stop, Reason, NewState}" n + "%% Description:There should be one instance of this function for each possible"n + "%% state name. Whenever a gen_fsm receives an event sent using" n + "%% gen_fsm:send_event/2, the instance of this function with the same name as"n + "%% the current state name StateName is called to handle the event. It is also "n + "%% called if a timeout occurs. " n + (erlang-skel-separator 2) + "state_name(_Event, State) ->" n> + "{next_state, state_name, State}." n + n + (erlang-skel-separator 2) + "%% Function:" n + "%% state_name(Event, From, State) -> {next_state, NextStateName, NextState} |"n + "%% {next_state, NextStateName, " n + "%% NextState, Timeout} |" n + "%% {reply, Reply, NextStateName, NextState}|"n + "%% {reply, Reply, NextStateName, " n + "%% NextState, Timeout} |" n + "%% {stop, Reason, NewState}|" n + "%% {stop, Reason, Reply, NewState}" n + "%% Description: There should be one instance of this function for each" n + "%% possible state name. Whenever a gen_fsm receives an event sent using" n + "%% gen_fsm:sync_send_event/2,3, the instance of this function with the same"n + "%% name as the current state name StateName is called to handle the event." n + (erlang-skel-separator 2) + "state_name(_Event, _From, State) ->" n> + "Reply = ok," n> + "{reply, Reply, state_name, State}." n + n + (erlang-skel-separator 2) + "%% Function: " n + "%% handle_event(Event, StateName, State) -> {next_state, NextStateName, "n + "%% NextState} |" n + "%% {next_state, NextStateName, "n + "%% NextState, Timeout} |" n + "%% {stop, Reason, NewState}" n + "%% Description: Whenever a gen_fsm receives an event sent using"n + "%% gen_fsm:send_all_state_event/2, this function is called to handle"n + "%% the event." n + (erlang-skel-separator 2) + "handle_event(_Event, StateName, State) ->" n> + "{next_state, StateName, State}." n + n + (erlang-skel-separator 2) + "%% Function: " n + "%% handle_sync_event(Event, From, StateName, "n + "%% State) -> {next_state, NextStateName, NextState} |" n + "%% {next_state, NextStateName, NextState, " n + "%% Timeout} |" n + "%% {reply, Reply, NextStateName, NextState}|" n + "%% {reply, Reply, NextStateName, NextState, " n + "%% Timeout} |" n + "%% {stop, Reason, NewState} |" n + "%% {stop, Reason, Reply, NewState}" n + "%% Description: Whenever a gen_fsm receives an event sent using"n + "%% gen_fsm:sync_send_all_state_event/2,3, this function is called to handle"n + "%% the event."n + (erlang-skel-separator 2) + "handle_sync_event(Event, From, StateName, State) ->" n> + "Reply = ok," n> + "{reply, Reply, StateName, State}." n + n + (erlang-skel-separator 2) + "%% Function: " n + "%% handle_info(Info,StateName,State)-> {next_state, NextStateName, NextState}|" n + "%% {next_state, NextStateName, NextState, "n + "%% Timeout} |" n + "%% {stop, Reason, NewState}" n + "%% Description: This function is called by a gen_fsm when it receives any"n + "%% other message than a synchronous or asynchronous event"n + "%% (or a system message)." n + (erlang-skel-separator 2) + "handle_info(_Info, StateName, State) ->" n> + "{next_state, StateName, State}." n + n + (erlang-skel-separator 2) + "%% Function: terminate(Reason, StateName, State) -> void()" n + "%% Description:This function is called by a gen_fsm when it is about"n + "%% to terminate. It should be the opposite of Module:init/1 and do any"n + "%% necessary cleaning up. When it returns, the gen_fsm terminates with"n + "%% Reason. The return value is ignored." n + (erlang-skel-separator 2) + "terminate(_Reason, _StateName, _State) ->" n> + "ok." n + n + (erlang-skel-separator 2) + "%% Function:" n + "%% code_change(OldVsn, StateName, State, Extra) -> {ok, StateName, NewState}" n + "%% Description: Convert process state when code is changed" n + (erlang-skel-separator 2) + "code_change(_OldVsn, StateName, State, _Extra) ->" n> + "{ok, StateName, State}." n + n + (erlang-skel-separator 2) + "%%% Internal functions" n + (erlang-skel-separator 2) + ) + "*The template of a gen_fsm. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-lib + '((erlang-skel-include erlang-skel-large-header) + + "%% API" n + "-export([])." n n + + (erlang-skel-double-separator 2) + "%% API" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Function: " n + "%% Description:" n + (erlang-skel-separator 2) + n + (erlang-skel-double-separator 2) + "%% Internal functions" n + (erlang-skel-double-separator 2) + ) + "*The template of a library module. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-corba-callback + '((erlang-skel-include erlang-skel-large-header) + "%% Include files" n n + + "%% API" n + "-export([])." n n + + "%% Corba callbacks" n + "-export([init/1, terminate/2, code_change/3])." n n + + "-record(state, {})." n n + + (erlang-skel-double-separator 2) + "%% Corba callbacks" n + (erlang-skel-double-separator 2) + (erlang-skel-separator 2) + "%% Function: init(Args) -> {ok, State} |" n + "%% {ok, State, Timeout} |" n + "%% ignore |" n + "%% {stop, Reason}" n + "%% Description: Initiates the server" n + (erlang-skel-separator 2) + "init([]) ->" n> + "{ok, #state{}}." n + n + (erlang-skel-separator 2) + "%% Function: terminate(Reason, State) -> void()" n + "%% Description: Shutdown the server" n + (erlang-skel-separator 2) + "terminate(_Reason, _State) ->" n> + "ok." n + n + (erlang-skel-separator 2) + "%% Function: code_change(OldVsn, State, Extra) -> {ok, NewState} " n + "%% Description: Convert process state when code is changed" n + (erlang-skel-separator 2) + "code_change(_OldVsn, State, _Extra) ->" n> + "{ok, State}." n + n + (erlang-skel-double-separator 2) + "%% Internal functions" n + (erlang-skel-double-separator 2) + ) + "*The template of a library module. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-ts-test-suite + '((erlang-skel-include erlang-skel-large-header) + "%% Note: This directive should only be used in test suites." n + "-compile(export_all)." n n + + "-include(\"test_server.hrl\")." n n + + (erlang-skel-separator 2) + "%% TEST SERVER CALLBACK FUNCTIONS" n + (erlang-skel-separator 2) + n + (erlang-skel-separator 2) + "%% Function: init_per_suite(Config0) -> Config1 | {skip,Reason}" n + "%%" n + "%% Config0 = Config1 = [tuple()]" n + "%% A list of key/value pairs, holding the test case configuration." n + "%% Reason = term()" n + "%% The reason for skipping the suite." n + "%%" n + "%% Description: Initialization before the suite." n + "%%" n + "%% Note: This function is free to add any key/value pairs to the Config" n + "%% variable, but should NOT alter/remove any existing entries." n + (erlang-skel-separator 2) + "init_per_suite(Config) ->" n > + "Config." n n + + (erlang-skel-separator 2) + "%% Function: end_per_suite(Config) -> void()" n + "%%" n + "%% Config = [tuple()]" n + "%% A list of key/value pairs, holding the test case configuration." n + "%%" n + "%% Description: Cleanup after the suite." n + (erlang-skel-separator 2) + "end_per_suite(_Config) ->" n > + "ok." n n + + (erlang-skel-separator 2) + "%% Function: init_per_testcase(TestCase, Config0) -> Config1 |" n + "%% {skip,Reason}" n + "%% TestCase = atom()" n + "%% Name of the test case that is about to run." n + "%% Config0 = Config1 = [tuple()]" n + "%% A list of key/value pairs, holding the test case configuration." n + "%% Reason = term()" n + "%% The reason for skipping the test case." n + "%%" n + "%% Description: Initialization before each test case." n + "%%" n + "%% Note: This function is free to add any key/value pairs to the Config" n + "%% variable, but should NOT alter/remove any existing entries." n + (erlang-skel-separator 2) + "init_per_testcase(_TestCase, Config) ->" n > + "Config." n n + + (erlang-skel-separator 2) + "%% Function: end_per_testcase(TestCase, Config) -> void()" n + "%%" n + "%% TestCase = atom()" n + "%% Name of the test case that is finished." n + "%% Config = [tuple()]" n + "%% A list of key/value pairs, holding the test case configuration." n + "%%" n + "%% Description: Cleanup after each test case." n + (erlang-skel-separator 2) + "end_per_testcase(_TestCase, _Config) ->" n > + "ok."n n + + (erlang-skel-separator 2) + "%% Function: all(Clause) -> Descr | Spec | {skip,Reason}" n + "%%" n + "%% Clause = doc | suite" n + "%% Indicates expected return value." n + "%% Descr = [string()] | []" n + "%% String that describes the test suite." n + "%% Spec = [TestCase]" n + "%% A test specification." n + "%% TestCase = ConfCase | atom()" n + "%% Configuration case, or the name of a test case function." n + "%% ConfCase = {conf,Init,Spec,End} |" n + "%% {conf,Properties,Init,Spec,End}" n + "%% Init = End = {Mod,Func} | Func" n + "%% Initialization and cleanup function." n + "%% Mod = Func = atom()" n + "%% Properties = [parallel | sequence | Shuffle | {RepeatType,N}]" n + "%% Execution properties of the test cases (may be combined)." n + "%% Shuffle = shuffle | {shuffle,Seed}" n + "%% To get cases executed in random order." n + "%% Seed = {integer(),integer(),integer()}" n + "%% RepeatType = repeat | repeat_until_all_ok | repeat_until_all_fail |" n + "%% repeat_until_any_ok | repeat_until_any_fail" n + "%% To get execution of cases repeated." n + "%% N = integer() | forever" n + "%% Reason = term()" n + "%% The reason for skipping the test suite." n + "%%" n + "%% Description: Returns a description of the test suite when" n + "%% Clause == doc, and a test specification (list" n + "%% of the conf and test cases in the suite) when" n + "%% Clause == suite." n + (erlang-skel-separator 2) + "all(doc) -> " n > + "[\"Describe the main purpose of this suite\"];" n n + "all(suite) -> " n > + "[a_test_case]." n n + n + (erlang-skel-separator 2) + "%% TEST CASES" n + (erlang-skel-separator 2) + n + (erlang-skel-separator 2) + "%% Function: TestCase(Arg) -> Descr | Spec | ok | exit() | {skip,Reason}" n + "%%" n + "%% Arg = doc | suite | Config" n + "%% Indicates expected behaviour and return value." n + "%% Config = [tuple()]" n + "%% A list of key/value pairs, holding the test case configuration." n + "%% Descr = [string()] | []" n + "%% String that describes the test case." n + "%% Spec = [tuple()] | []" n + "%% A test specification, see all/1." n + "%% Reason = term()" n + "%% The reason for skipping the test case." n + "%%" n + "%% Description: Test case function. Returns a description of the test" n + "%% case (doc), then returns a test specification (suite)," n + "%% or performs the actual test (Config)." n + (erlang-skel-separator 2) + "a_test_case(doc) -> " n > + "[\"Describe the main purpose of this test case\"];" n n + "a_test_case(suite) -> " n > + "[];" n n + "a_test_case(Config) when is_list(Config) -> " n > + "ok." n + ) + "*The template of a library module. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-ct-test-suite-l + '((erlang-skel-include erlang-skel-large-header) + "%% Note: This directive should only be used in test suites." n + "-compile(export_all)." n n + + "-include(\"ct.hrl\")." n n + + (erlang-skel-separator 2) + "%% COMMON TEST CALLBACK FUNCTIONS" n + (erlang-skel-separator 2) + n + (erlang-skel-separator 2) + "%% Function: suite() -> Info" n + "%%" n + "%% Info = [tuple()]" n + "%% List of key/value pairs." n + "%%" n + "%% Description: Returns list of tuples to set default properties" n + "%% for the suite." n + "%%" n + "%% Note: The suite/0 function is only meant to be used to return" n + "%% default data values, not perform any other operations." n + (erlang-skel-separator 2) + "suite() ->" n > + "[{timetrap,{minutes,10}}]." n n + + (erlang-skel-separator 2) + "%% Function: init_per_suite(Config0) ->" n + "%% Config1 | {skip,Reason} | {skip_and_save,Reason,Config1}" n + "%%" n + "%% Config0 = Config1 = [tuple()]" n + "%% A list of key/value pairs, holding the test case configuration." n + "%% Reason = term()" n + "%% The reason for skipping the suite." n + "%%" n + "%% Description: Initialization before the suite." n + "%%" n + "%% Note: This function is free to add any key/value pairs to the Config" n + "%% variable, but should NOT alter/remove any existing entries." n + (erlang-skel-separator 2) + "init_per_suite(Config) ->" n > + "Config." n n + + (erlang-skel-separator 2) + "%% Function: end_per_suite(Config0) -> void() | {save_config,Config1}" n + "%%" n + "%% Config0 = Config1 = [tuple()]" n + "%% A list of key/value pairs, holding the test case configuration." n + "%%" n + "%% Description: Cleanup after the suite." n + (erlang-skel-separator 2) + "end_per_suite(_Config) ->" n > + "ok." n n + + (erlang-skel-separator 2) + "%% Function: init_per_group(GroupName, Config0) ->" n + "%% Config1 | {skip,Reason} | {skip_and_save,Reason,Config1}" n + "%%" n + "%% GroupName = atom()" n + "%% Name of the test case group that is about to run." n + "%% Config0 = Config1 = [tuple()]" n + "%% A list of key/value pairs, holding configuration data for the group." n + "%% Reason = term()" n + "%% The reason for skipping all test cases and subgroups in the group." n + "%%" n + "%% Description: Initialization before each test case group." n + (erlang-skel-separator 2) + "init_per_group(_GroupName, Config) ->" n > + "Config." n n + + (erlang-skel-separator 2) + "%% Function: end_per_group(GroupName, Config0) ->" n + "%% void() | {save_config,Config1}" n + "%%" n + "%% GroupName = atom()" n + "%% Name of the test case group that is finished." n + "%% Config0 = Config1 = [tuple()]" n + "%% A list of key/value pairs, holding configuration data for the group." n + "%%" n + "%% Description: Cleanup after each test case group." n + (erlang-skel-separator 2) + "end_per_group(_GroupName, _Config) ->" n > + "ok." n n + + (erlang-skel-separator 2) + "%% Function: init_per_testcase(TestCase, Config0) ->" n + "%% Config1 | {skip,Reason} | {skip_and_save,Reason,Config1}" n + "%%" n + "%% TestCase = atom()" n + "%% Name of the test case that is about to run." n + "%% Config0 = Config1 = [tuple()]" n + "%% A list of key/value pairs, holding the test case configuration." n + "%% Reason = term()" n + "%% The reason for skipping the test case." n + "%%" n + "%% Description: Initialization before each test case." n + "%%" n + "%% Note: This function is free to add any key/value pairs to the Config" n + "%% variable, but should NOT alter/remove any existing entries." n + (erlang-skel-separator 2) + "init_per_testcase(_TestCase, Config) ->" n > + "Config." n n + + (erlang-skel-separator 2) + "%% Function: end_per_testcase(TestCase, Config0) ->" n + "%% void() | {save_config,Config1} | {fail,Reason}" n + "%%" n + "%% TestCase = atom()" n + "%% Name of the test case that is finished." n + "%% Config0 = Config1 = [tuple()]" n + "%% A list of key/value pairs, holding the test case configuration." n + "%% Reason = term()" n + "%% The reason for failing the test case." n + "%%" n + "%% Description: Cleanup after each test case." n + (erlang-skel-separator 2) + "end_per_testcase(_TestCase, _Config) ->" n > + "ok." n n + + (erlang-skel-separator 2) + "%% Function: groups() -> [Group]" n + "%%" n + "%% Group = {GroupName,Properties,GroupsAndTestCases}" n + "%% GroupName = atom()" n + "%% The name of the group." n + "%% Properties = [parallel | sequence | Shuffle | {RepeatType,N}]" n + "%% Group properties that may be combined." n + "%% GroupsAndTestCases = [Group | {group,GroupName} | TestCase]" n + "%% TestCase = atom()" n + "%% The name of a test case." n + "%% Shuffle = shuffle | {shuffle,Seed}" n + "%% To get cases executed in random order." n + "%% Seed = {integer(),integer(),integer()}" n + "%% RepeatType = repeat | repeat_until_all_ok | repeat_until_all_fail |" n + "%% repeat_until_any_ok | repeat_until_any_fail" n + "%% To get execution of cases repeated." n + "%% N = integer() | forever" n + "%%" n + "%% Description: Returns a list of test case group definitions." n + (erlang-skel-separator 2) + "groups() ->" n > + "[]." n n + + (erlang-skel-separator 2) + "%% Function: all() -> GroupsAndTestCases | {skip,Reason}" n + "%%" n + "%% GroupsAndTestCases = [{group,GroupName} | TestCase]" n + "%% GroupName = atom()" n + "%% Name of a test case group." n + "%% TestCase = atom()" n + "%% Name of a test case." n + "%% Reason = term()" n + "%% The reason for skipping all groups and test cases." n + "%%" n + "%% Description: Returns the list of groups and test cases that" n + "%% are to be executed." n + (erlang-skel-separator 2) + "all() -> " n > + "[my_test_case]." n n + + n + (erlang-skel-separator 2) + "%% TEST CASES" n + (erlang-skel-separator 2) + n + + (erlang-skel-separator 2) + "%% Function: TestCase() -> Info" n + "%%" n + "%% Info = [tuple()]" n + "%% List of key/value pairs." n + "%%" n + "%% Description: Test case info function - returns list of tuples to set" n + "%% properties for the test case." n + "%%" n + "%% Note: This function is only meant to be used to return a list of" n + "%% values, not perform any other operations." n + (erlang-skel-separator 2) + "my_test_case() -> " n > + "[]." n n + + (erlang-skel-separator 2) + "%% Function: TestCase(Config0) ->" n + "%% ok | exit() | {skip,Reason} | {comment,Comment} |" n + "%% {save_config,Config1} | {skip_and_save,Reason,Config1}" n + "%%" n + "%% Config0 = Config1 = [tuple()]" n + "%% A list of key/value pairs, holding the test case configuration." n + "%% Reason = term()" n + "%% The reason for skipping the test case." n + "%% Comment = term()" n + "%% A comment about the test case that will be printed in the html log." n + "%%" n + "%% Description: Test case function. (The name of it must be specified in" n + "%% the all/0 list or in a test case group for the test case" n + "%% to be executed)." n + (erlang-skel-separator 2) + "my_test_case(_Config) -> " n > + "ok." n + ) + "*The template of a library module. +Please see the function `tempo-define-template'.") + +(defvar erlang-skel-ct-test-suite-s + '((erlang-skel-include erlang-skel-large-header) + "-compile(export_all)." n n + + "-include(\"ct.hrl\")." n n + + (erlang-skel-separator 2) + "%% Function: suite() -> Info" n + "%% Info = [tuple()]" n + (erlang-skel-separator 2) + "suite() ->" n > + "[{timetrap,{seconds,30}}]." n n + + (erlang-skel-separator 2) + "%% Function: init_per_suite(Config0) ->" n + "%% Config1 | {skip,Reason} | {skip_and_save,Reason,Config1}" n + "%% Config0 = Config1 = [tuple()]" n + "%% Reason = term()" n + (erlang-skel-separator 2) + "init_per_suite(Config) ->" n > + "Config." n n + + (erlang-skel-separator 2) + "%% Function: end_per_suite(Config0) -> void() | {save_config,Config1}" n + "%% Config0 = Config1 = [tuple()]" n + (erlang-skel-separator 2) + "end_per_suite(_Config) ->" n > + "ok." n n + + (erlang-skel-separator 2) + "%% Function: init_per_group(GroupName, Config0) ->" n + "%% Config1 | {skip,Reason} | {skip_and_save,Reason,Config1}" n + "%% GroupName = atom()" n + "%% Config0 = Config1 = [tuple()]" n + "%% Reason = term()" n + (erlang-skel-separator 2) + "init_per_group(_GroupName, Config) ->" n > + "Config." n n + + (erlang-skel-separator 2) + "%% Function: end_per_group(GroupName, Config0) ->" n + "%% void() | {save_config,Config1}" n + "%% GroupName = atom()" n + "%% Config0 = Config1 = [tuple()]" n + (erlang-skel-separator 2) + "end_per_group(_GroupName, _Config) ->" n > + "ok." n n + + (erlang-skel-separator 2) + "%% Function: init_per_testcase(TestCase, Config0) ->" n + "%% Config1 | {skip,Reason} | {skip_and_save,Reason,Config1}" n + "%% TestCase = atom()" n + "%% Config0 = Config1 = [tuple()]" n + "%% Reason = term()" n + (erlang-skel-separator 2) + "init_per_testcase(_TestCase, Config) ->" n > + "Config." n n + + (erlang-skel-separator 2) + "%% Function: end_per_testcase(TestCase, Config0) ->" n + "%% void() | {save_config,Config1} | {fail,Reason}" n + "%% TestCase = atom()" n + "%% Config0 = Config1 = [tuple()]" n + "%% Reason = term()" n + (erlang-skel-separator 2) + "end_per_testcase(_TestCase, _Config) ->" n > + "ok." n n + + (erlang-skel-separator 2) + "%% Function: groups() -> [Group]" n + "%% Group = {GroupName,Properties,GroupsAndTestCases}" n + "%% GroupName = atom()" n + "%% Properties = [parallel | sequence | Shuffle | {RepeatType,N}]" n + "%% GroupsAndTestCases = [Group | {group,GroupName} | TestCase]" n + "%% TestCase = atom()" n + "%% Shuffle = shuffle | {shuffle,{integer(),integer(),integer()}}" n + "%% RepeatType = repeat | repeat_until_all_ok | repeat_until_all_fail |" n + "%% repeat_until_any_ok | repeat_until_any_fail" n + "%% N = integer() | forever" n + (erlang-skel-separator 2) + "groups() ->" n > + "[]." n n + + (erlang-skel-separator 2) + "%% Function: all() -> GroupsAndTestCases | {skip,Reason}" n + "%% GroupsAndTestCases = [{group,GroupName} | TestCase]" n + "%% GroupName = atom()" n + "%% TestCase = atom()" n + "%% Reason = term()" n + (erlang-skel-separator 2) + "all() -> " n > + "[my_test_case]." n n + + (erlang-skel-separator 2) + "%% Function: TestCase() -> Info" n + "%% Info = [tuple()]" n + (erlang-skel-separator 2) + "my_test_case() -> " n > + "[]." n n + + (erlang-skel-separator 2) + "%% Function: TestCase(Config0) ->" n + "%% ok | exit() | {skip,Reason} | {comment,Comment} |" n + "%% {save_config,Config1} | {skip_and_save,Reason,Config1}" n + "%% Config0 = Config1 = [tuple()]" n + "%% Reason = term()" n + "%% Comment = term()" n + (erlang-skel-separator 2) + "my_test_case(_Config) -> " n > + "ok." n + ) + "*The template of a library module. +Please see the function `tempo-define-template'.") + +;; Font-lock variables + +;; The next few variables define different Erlang font-lock patterns. +;; They could be appended to form a custom font-lock appearance. +;; +;; The function `erlang-font-lock-set-face' could be used to change +;; the face of a pattern. +;; +;; Note that Erlang strings and atoms are highlighted with using +;; syntactic analysis. + +(defvar erlang-font-lock-keywords-function-header + (list + (list (concat "^" erlang-atom-regexp "\\s-*(") + 1 'font-lock-function-name-face t)) + "Font lock keyword highlighting a function header.") + +(defvar erlang-font-lock-keywords-int-bifs + (list + (list (concat erlang-int-bif-regexp "\\s-*(") + 1 'font-lock-builtin-face)) + "Font lock keyword highlighting built in functions.") + +(defvar erlang-font-lock-keywords-ext-bifs + (list + (list (concat "\\<\\(erlang\\)\\s-*:\\s-*" erlang-ext-bif-regexp "\\s-*(") + '(1 'font-lock-builtin-face) + '(2 'font-lock-builtin-face))) + "Font lock keyword highlighting built in functions.") + +(defvar erlang-font-lock-keywords-int-function-calls + (list + (list (concat erlang-atom-regexp "\\s-*(") + 1 'font-lock-type-face)) + "Font lock keyword highlighting an internal function call.") + +(defvar erlang-font-lock-keywords-ext-function-calls + (list + (list (concat erlang-atom-regexp "\\s-*:\\s-*" + erlang-atom-regexp "\\s-*(") + '(1 'font-lock-type-face) + '(2 'font-lock-type-face))) + "Font lock keyword highlighting an external function call.") + +(defvar erlang-font-lock-keywords-fun-n + (list + (list (concat "\\(" erlang-atom-regexp "/[0-9]+\\)") + 1 'font-lock-type-face)) + "Font lock keyword highlighting a fun descriptor in F/N format.") + +(defvar erlang-font-lock-keywords-operators + (list + (list erlang-operators-regexp + 1 'font-lock-builtin-face)) + "Font lock keyword highlighting Erlang operators.") + +(defvar erlang-font-lock-keywords-dollar + (list + (list "\\(\\$\\([^\\]\\|\\\\\\([^0-7^\n]\\|[0-7]+\\|\\^[a-zA-Z]\\)\\)\\)" + 1 'font-lock-constant-face)) + "Font lock keyword highlighting numbers in ASCII form (e.g. $A).") + +(defvar erlang-font-lock-keywords-arrow + (list + (list "->\\(\\s \\|$\\)" 1 'font-lock-function-name-face)) + "Font lock keyword highlighting clause arrow.") + +(defvar erlang-font-lock-keywords-lc + (list + (list "\\(<-\\|<=\\|||\\)\\(\\s \\|$\\)" 1 'font-lock-keyword-face)) + "Font lock keyword highlighting list comprehension operators.") + +(defvar erlang-font-lock-keywords-keywords + (list + (list erlang-keywords-regexp 1 'font-lock-keyword-face)) + "Font lock keyword highlighting Erlang keywords.") + +(defvar erlang-font-lock-keywords-attr + (list + (list (concat "^\\(-" erlang-atom-regexp "\\)\\(\\s-\\|\\.\\|(\\)") + 1 (if (boundp 'font-lock-preprocessor-face) + 'font-lock-preprocessor-face + 'font-lock-function-name-face))) + "Font lock keyword highlighting attributes.") + +(defvar erlang-font-lock-keywords-quotes + (list + (list "`\\([-+a-zA-Z0-9_:*][-+a-zA-Z0-9_:*]+\\)'" + 1 + 'font-lock-keyword-face + t)) + "Font lock keyword highlighting words in single quotes in comments. + +This is not the highlighting of Erlang strings and atoms, which +are highlighted by syntactic analysis.") + +(defvar erlang-font-lock-keywords-guards + (list + (list (concat "[^:]" erlang-guards-regexp "\\s-*(") + 1 'font-lock-builtin-face)) + "Font lock keyword highlighting guards.") + +(defvar erlang-font-lock-keywords-predefined-types + (list + (list (concat "[^:]" erlang-predefined-types-regexp "\\s-*(") + 1 'font-lock-builtin-face)) + "Font lock keyword highlighting predefined types.") + + +(defvar erlang-font-lock-keywords-macros + (list + (list (concat "?\\s-*\\(" erlang-atom-regexp + "\\|" erlang-variable-regexp "\\)") + 1 'font-lock-type-face) + (list (concat "^\\(-\\(?:define\\|ifn?def\\)\\)\\s-*(\\s-*\\(" erlang-atom-regexp + "\\|" erlang-variable-regexp "\\)") + (list 1 'font-lock-preprocessor-face t) + (list 3 'font-lock-type-face t t)) + (list "^-e\\(lse\\|ndif\\)\\>" 0 'font-lock-preprocessor-face t)) + "Font lock keyword highlighting macros. +This must be placed in front of `erlang-font-lock-keywords-vars'.") + +(defvar erlang-font-lock-keywords-records + (list + (list (concat "#\\s *" erlang-atom-regexp) + 1 'font-lock-type-face) + ;; Don't highlight numerical constants. + (list (if erlang-regexp-modern-p + "\\_<[0-9]+#\\([0-9a-zA-Z]+\\)" + "\\<[0-9]+#\\([0-9a-zA-Z]+\\)") + 1 nil t) + (list (concat "^-record\\s-*(\\s-*" erlang-atom-regexp) + 1 'font-lock-type-face)) + "Font lock keyword highlighting Erlang records. +This must be placed in front of `erlang-font-lock-keywords-vars'.") + +(defvar erlang-font-lock-keywords-vars + (list + (list (concat "[^#]" erlang-variable-regexp) ; no numerical constants + 1 'font-lock-variable-name-face)) + "Font lock keyword highlighting Erlang variables. +Must be preceded by `erlang-font-lock-keywords-macros' to work properly.") + +(defvar erlang-font-lock-descr-string + "Font-lock keywords used by Erlang Mode. + +There exists three levels of Font Lock keywords for Erlang: + `erlang-font-lock-keywords-1' - Function headers and reserved keywords. + `erlang-font-lock-keywords-2' - Bifs, guards and `single quotes'. + `erlang-font-lock-keywords-3' - Variables, macros and records. + `erlang-font-lock-keywords-4' - Function names, Funs, LCs (not Atoms) + +To use a specific level, please set the variable +`font-lock-maximum-decoration' to the appropriate level. Note that the +variable must be set before Erlang mode is activated. + +Example: + (setq font-lock-maximum-decoration 2)") + +(defvar erlang-font-lock-keywords-1 + (append erlang-font-lock-keywords-function-header + erlang-font-lock-keywords-dollar + erlang-font-lock-keywords-arrow + erlang-font-lock-keywords-keywords + ) + ;; DocStringOrig: erlang-font-lock-keywords + erlang-font-lock-descr-string) + +(defvar erlang-font-lock-keywords-2 + (append erlang-font-lock-keywords-1 + erlang-font-lock-keywords-int-bifs + erlang-font-lock-keywords-ext-bifs + erlang-font-lock-keywords-attr + erlang-font-lock-keywords-quotes + erlang-font-lock-keywords-guards + ) + ;; DocStringCopy: erlang-font-lock-keywords + erlang-font-lock-descr-string) + +(defvar erlang-font-lock-keywords-3 + (append erlang-font-lock-keywords-2 + erlang-font-lock-keywords-operators + erlang-font-lock-keywords-macros + erlang-font-lock-keywords-records + erlang-font-lock-keywords-vars + erlang-font-lock-keywords-predefined-types + ) + ;; DocStringCopy: erlang-font-lock-keywords + erlang-font-lock-descr-string) + +(defvar erlang-font-lock-keywords-4 + (append erlang-font-lock-keywords-3 + erlang-font-lock-keywords-int-function-calls + erlang-font-lock-keywords-ext-function-calls + erlang-font-lock-keywords-fun-n + erlang-font-lock-keywords-lc + ) + ;; DocStringCopy: erlang-font-lock-keywords + erlang-font-lock-descr-string) + +(defvar erlang-font-lock-keywords erlang-font-lock-keywords-4 + ;; DocStringCopy: erlang-font-lock-keywords + erlang-font-lock-descr-string) + +(defvar erlang-font-lock-syntax-table nil + "Syntax table used by Font Lock mode. + +The difference between this and the standard Erlang Mode +syntax table is that `_' is treated as part of words by +this syntax table. + +Unfortunately, XEmacs hasn't got support for a special Font +Lock syntax table. The effect is that `apply' in the atom +`foo_apply' will be highlighted as a bif.") + + +;;; Avoid errors while compiling this file. + +;; `eval-when-compile' is not defined in Emacs 18. We define it as a +;; no-op. +(or (fboundp 'eval-when-compile) + (defmacro eval-when-compile (&rest rest) nil)) + +;; These umm...functions are new in Emacs 20. And, yes, until version +;; 19.27 Emacs backquotes were this ugly. + +(or (fboundp 'unless) + (defmacro unless (condition &rest body) + "(unless CONDITION BODY...): If CONDITION is false, do BODY, else return nil." + `((if (, condition) nil ,@body)))) + +(or (fboundp 'when) + (defmacro when (condition &rest body) + "(when CONDITION BODY...): If CONDITION is true, do BODY, else return nil." + `((if (, condition) (progn ,@body) nil)))) + +(or (fboundp 'char-before) + (defmacro char-before (&optional pos) + "Return the character in the current buffer just before POS." + `( (char-after (1- (or ,pos (point))))))) + +;; defvar some obsolete variables, which we still support for +;; backwardscompatibility reasons. +(eval-when-compile + (defvar comment-indent-hook) + (defvar dabbrev-case-fold-search) + (defvar tempo-match-finder) + (defvar compilation-menu-map) + (defvar next-error-last-buffer)) + +(eval-when-compile + (if (or (featurep 'bytecomp) + (featurep 'byte-compile)) + (progn + (cond ((string-match "Lucid\\|XEmacs" emacs-version) + (put 'comment-indent-hook 'byte-obsolete-variable nil) + ;; Do not warn for unused variables + ;; when compiling under XEmacs. + (setq byte-compile-warnings + '(free-vars unresolved callargs redefine)))) + (require 'comint) + (require 'tempo) + (require 'compile)))) + + +(defun erlang-version () + "Return the current version of Erlang mode." + (interactive) + (if (interactive-p) + (message "Erlang mode version %s, written by Anders Lindgren" + erlang-version)) + erlang-version) + + +;;;###autoload +(defun erlang-mode () + "Major mode for editing Erlang source files in Emacs. +It knows about syntax and comment, it can indent code, it is capable +of fontifying the source file, the TAGS commands are aware of Erlang +modules, and the Erlang man pages can be accessed. + +Should this module, \"erlang.el\", be installed properly, Erlang mode +is activated whenever an Erlang source or header file is loaded into +Emacs. To indicate this, the mode line should contain the word +\"Erlang\". + +The main feature of Erlang mode is indentation, press TAB and the +current line will be indented correctly. + +Comments starting with only one `%' are indented to the column stored +in the variable `comment-column'. Comments starting with two `%':s +are indented with the same indentation as code. Comments starting +with at least three `%':s are indented to the first column. + +However, Erlang mode contains much more, this is a list of the most +useful commands: + TAB - Indent the line. + C-c C-q - Indent current function. + M-; - Create a comment at the end of the line. + M-q - Fill a comment, i.e. wrap lines so that they (hopefully) + will look better. + M-a - Goto the beginning of an Erlang clause. + M-C-a - Ditto for function. + M-e - Goto the end of an Erlang clause. + M-C-e - Ditto for function. + M-h - Mark current Erlang clause. + M-C-h - Ditto for function. + C-c C-z - Start, or switch to, an inferior Erlang shell. + C-c C-k - Compile current file. + C-x ` - Next error. + , - Electric comma. + ; - Electric semicolon. + +Erlang mode check the name of the file against the module name when +saving, whenever a mismatch occurs Erlang mode offers to modify the +source. + +The variable `erlang-electric-commands' controls the electric +commands. To deactivate all of them, set it to nil. + +There exists a large number of commands and variables in the Erlang +module. Please press `M-x apropos RET erlang RET' to see a complete +list. Press `C-h f name-of-function RET' and `C-h v name-of-variable +RET'to see the full description of functions and variables, +respectively. + +On entry to this mode the contents of the hook `erlang-mode-hook' is +executed. + +Please see the beginning of the file `erlang.el' for more information +and examples of hooks. + +Other commands: +\\{erlang-mode-map}" + (interactive) + (kill-all-local-variables) + (setq major-mode 'erlang-mode) + (setq mode-name "Erlang") + (erlang-syntax-table-init) + (erlang-keymap-init) + (erlang-electric-init) + (erlang-menu-init) + (erlang-mode-variables) + (erlang-check-module-name-init) + (erlang-add-compilation-alist erlang-error-regexp-alist) + (erlang-man-init) + (erlang-tags-init) + (erlang-font-lock-init) + (erlang-skel-init) + (tempo-use-tag-list 'erlang-tempo-tags) + (run-hooks 'erlang-mode-hook) + (if (zerop (buffer-size)) + (run-hooks 'erlang-new-file-hook)) + ;; Doesn't exist in Emacs v21.4; required by Emacs v23. + (if (boundp 'after-change-major-mode-hook) + (run-hooks 'after-change-major-mode-hook))) + + +(defun erlang-syntax-table-init () + (if (null erlang-mode-syntax-table) + (let ((table (make-syntax-table))) + (modify-syntax-entry ?\n ">" table) + (modify-syntax-entry ?\" "\"" table) + (modify-syntax-entry ?# "." table) +;; (modify-syntax-entry ?$ "\\" table) ;; Creates problems with indention afterwards +;; (modify-syntax-entry ?$ "'" table) ;; Creates syntax highlighting and indention problems + (modify-syntax-entry ?$ "/" table) ;; Misses the corner case "string that ends with $" + ;; we have to live with that for now..it is the best alternative + ;; that can be worked around with "string hat ends with \$" + (modify-syntax-entry ?% "<" table) + (modify-syntax-entry ?& "." table) + (modify-syntax-entry ?\' "\"" table) + (modify-syntax-entry ?* "." table) + (modify-syntax-entry ?+ "." table) + (modify-syntax-entry ?- "." table) + (modify-syntax-entry ?/ "." table) + (modify-syntax-entry ?: "." table) + (modify-syntax-entry ?< "." table) + (modify-syntax-entry ?= "." table) + (modify-syntax-entry ?> "." table) + (modify-syntax-entry ?\\ "\\" table) + (modify-syntax-entry ?_ "_" table) + (modify-syntax-entry ?| "." table) + (modify-syntax-entry ?^ "'" table) + + ;; Pseudo bit-syntax: Latin1 double angle quotes as parens. + ;;(modify-syntax-entry ?\253 "(?\273" table) + ;;(modify-syntax-entry ?\273 ")?\253" table) + + (setq erlang-mode-syntax-table table))) + + (set-syntax-table erlang-mode-syntax-table)) + + +(defun erlang-keymap-init () + (if erlang-mode-map + nil + (setq erlang-mode-map (make-sparse-keymap)) + (erlang-mode-commands erlang-mode-map)) + (use-local-map erlang-mode-map)) + + +(defun erlang-mode-commands (map) + (unless (boundp 'indent-line-function) + (define-key map "\t" 'erlang-indent-command)) + (define-key map ";" 'erlang-electric-semicolon) + (define-key map "," 'erlang-electric-comma) + (define-key map "<" 'erlang-electric-lt) + (define-key map ">" 'erlang-electric-gt) + (define-key map "\C-m" 'erlang-electric-newline) + (if (not (boundp 'delete-key-deletes-forward)) + (define-key map "\177" 'backward-delete-char-untabify) + (define-key map [(backspace)] 'backward-delete-char-untabify)) + ;;(unless (boundp 'fill-paragraph-function) + (define-key map "\M-q" 'erlang-fill-paragraph) + (unless (boundp 'beginning-of-defun-function) + (define-key map "\M-\C-a" 'erlang-beginning-of-function) + (define-key map "\M-\C-e" 'erlang-end-of-function) + (define-key map '(meta control h) 'erlang-mark-function)) ; Xemacs + (define-key map "\M-\t" 'erlang-complete-tag) + (define-key map "\C-c\M-\t" 'tempo-complete-tag) + (define-key map "\M-+" 'erlang-find-next-tag) + (define-key map "\C-c\M-a" 'erlang-beginning-of-clause) + (define-key map "\C-c\M-b" 'tempo-backward-mark) + (define-key map "\C-c\M-e" 'erlang-end-of-clause) + (define-key map "\C-c\M-f" 'tempo-forward-mark) + (define-key map "\C-c\M-h" 'erlang-mark-clause) + (define-key map "\C-c\C-c" 'comment-region) + (define-key map "\C-c\C-j" 'erlang-generate-new-clause) + (define-key map "\C-c\C-k" 'erlang-compile) + (define-key map "\C-c\C-l" 'erlang-compile-display) + (define-key map "\C-c\C-s" 'erlang-show-syntactic-information) + (define-key map "\C-c\C-q" 'erlang-indent-function) + (define-key map "\C-c\C-u" 'erlang-uncomment-region) + (define-key map "\C-c\C-y" 'erlang-clone-arguments) + (define-key map "\C-c\C-a" 'erlang-align-arrows) + (define-key map "\C-c\C-z" 'erlang-shell-display) + (unless inferior-erlang-use-cmm + (define-key map "\C-x`" 'erlang-next-error))) + + +(defun erlang-electric-init () + ;; Set up electric character functions to work with + ;; delsel/pending-del mode. Also, set up text properties for bit + ;; syntax handling. + (mapc #'(lambda (cmd) + (put cmd 'delete-selection t) ;for delsel (Emacs) + (put cmd 'pending-delete t)) ;for pending-del (XEmacs) + '(erlang-electric-semicolon + erlang-electric-comma + erlang-electric-gt)) + + (put 'bitsyntax-open-outer 'syntax-table '(4 . ?>)) + (put 'bitsyntax-open-outer 'rear-nonsticky '(category)) + (put 'bitsyntax-open-inner 'rear-nonsticky '(category)) + (put 'bitsyntax-close-inner 'rear-nonsticky '(category)) + (put 'bitsyntax-close-outer 'syntax-table '(5 . ?<)) + (put 'bitsyntax-close-outer 'rear-nonsticky '(category)) + (make-local-variable 'parse-sexp-lookup-properties) + (setq parse-sexp-lookup-properties 't)) + + +(defun erlang-mode-variables () + (or erlang-mode-abbrev-table + (define-abbrev-table 'erlang-mode-abbrev-table ())) + (setq local-abbrev-table erlang-mode-abbrev-table) + (make-local-variable 'paragraph-start) + (setq paragraph-start (concat "^$\\|" page-delimiter)) + (make-local-variable 'paragraph-separate) + (setq paragraph-separate paragraph-start) + (make-local-variable 'paragraph-ignore-fill-prefix) + (setq paragraph-ignore-fill-prefix t) + (make-local-variable 'require-final-newline) + (setq require-final-newline t) + (make-local-variable 'defun-prompt-regexp) + (setq defun-prompt-regexp erlang-defun-prompt-regexp) + (make-local-variable 'comment-start) + (setq comment-start "%") + (make-local-variable 'comment-start-skip) + (setq comment-start-skip "%+\\s *") + (make-local-variable 'comment-column) + (setq comment-column 48) + (make-local-variable 'indent-line-function) + (setq indent-line-function 'erlang-indent-command) + (make-local-variable 'indent-region-function) + (setq indent-region-function 'erlang-indent-region) + (set (make-local-variable 'comment-indent-function) 'erlang-comment-indent) + (if (<= erlang-emacs-major-version 18) + (set (make-local-variable 'comment-indent-hook) 'erlang-comment-indent)) + (set (make-local-variable 'parse-sexp-ignore-comments) t) + (set (make-local-variable 'dabbrev-case-fold-search) nil) + (set (make-local-variable 'imenu-prev-index-position-function) + 'erlang-beginning-of-function) + (set (make-local-variable 'imenu-extract-index-name-function) + 'erlang-get-function-name) + (set (make-local-variable 'tempo-match-finder) + "[^-a-zA-Z0-9_]\\([-a-zA-Z0-9_]*\\)\\=") + (set (make-local-variable 'beginning-of-defun-function) + 'erlang-beginning-of-function) + (set (make-local-variable 'end-of-defun-function) 'erlang-end-of-function) + (set (make-local-variable 'open-paren-in-column-0-is-defun-start) nil) + (set (make-local-variable 'fill-paragraph-function) 'erlang-fill-paragraph) + (set (make-local-variable 'comment-add) 1) + (set (make-local-variable 'outline-regexp) "[[:lower:]0-9_]+ *(.*) *-> *$") + (set (make-local-variable 'outline-level) (lambda () 1)) + (set (make-local-variable 'add-log-current-defun-function) + 'erlang-current-defun)) + + +;; Compilation. +;; +;; The following code is compatible with the standard package `compilation', +;; making it possible to go to errors using `erlang-next-error' (or just +;; `next-error' in Emacs 21). +;; +;; The normal `compile' command works of course. For best result, please +;; execute `make' with the `-w' flag. +;; +;; Please see the variables named `compiling-..' above. + +(defun erlang-add-compilation-alist (alist) + (require 'compile) + (cond ((boundp 'compilation-error-regexp-alist) ; Emacs 19 + (while alist + (or (assoc (car (car alist)) compilation-error-regexp-alist) + (setq compilation-error-regexp-alist + (cons (car alist) compilation-error-regexp-alist))) + (setq alist (cdr alist)))) + ((boundp 'compilation-error-regexp) + ;; Emacs 18, Only one regexp is allowed. + (funcall (symbol-function 'set) + 'compilation-error-regexp (car (car alist)))))) + +(defun erlang-font-lock-init () + "Initialize Font Lock for Erlang mode." + (or erlang-font-lock-syntax-table + (setq erlang-font-lock-syntax-table + (let ((table (copy-syntax-table erlang-mode-syntax-table))) + (modify-syntax-entry ?_ "w" table) + table))) + (set (make-local-variable 'font-lock-syntax-table) + erlang-font-lock-syntax-table) + (set (make-local-variable 'font-lock-beginning-of-syntax-function) + 'erlang-beginning-of-clause) + (make-local-variable 'font-lock-keywords) + (let ((level (cond ((boundp 'font-lock-maximum-decoration) + (symbol-value 'font-lock-maximum-decoration)) + ((boundp 'font-lock-use-maximal-decoration) + (symbol-value 'font-lock-use-maximal-decoration)) + (t nil)))) + (if (consp level) + (setq level (cdr-safe (or (assq 'erlang-mode level) + (assq t level))))) + ;; `level' can here be: + ;; A number - The fontification level + ;; nil - Use the default + ;; t - Use maximum + (cond ((eq level nil) + (set 'font-lock-keywords erlang-font-lock-keywords)) + ((eq level 1) + (set 'font-lock-keywords erlang-font-lock-keywords-1)) + ((eq level 2) + (set 'font-lock-keywords erlang-font-lock-keywords-2)) + ((eq level 3) + (set 'font-lock-keywords erlang-font-lock-keywords-3)) + (t + (set 'font-lock-keywords erlang-font-lock-keywords-4)))) + + ;; Modern font-locks can handle the above much more elegantly: + (set (make-local-variable 'font-lock-defaults) + '((erlang-font-lock-keywords erlang-font-lock-keywords-1 + erlang-font-lock-keywords-2 + erlang-font-lock-keywords-3 + erlang-font-lock-keywords-4) + nil nil ((?_ . "w")) erlang-beginning-of-clause + (font-lock-mark-block-function . erlang-mark-clause)))) + + + +;; Useful when defining your own keywords. +(defun erlang-font-lock-set-face (ks &rest faces) + "Replace the face components in a list of keywords. + +The first argument, KS, is a list of keywords. The rest of the +arguments are expressions to replace the face information with. The +first expression replaces the face of the first keyword, the second +expression the second keyword etc. + +Should an expression be nil, the face of the corresponding keyword is +not changed. + +Should fewer expressions than keywords be given, the last expression +is used for all remaining keywords. + +Normally, the expressions are just atoms representing the new face. +They could however be more complex, returning different faces in +different situations. + +This function only handles keywords with elements on the forms: + (REGEXP NUMBER FACE) + (REGEXP NUMBER FACE OVERWRITE) + +This could be used when defining your own special font-lock setup, e.g: + +\(setq my-font-lock-keywords + (append erlang-font-lock-keywords-function-header + erlang-font-lock-keywords-dollar + (erlang-font-lock-set-face + erlang-font-lock-keywords-macros 'my-neon-green-face) + (erlang-font-lock-set-face + erlang-font-lock-keywords-lc 'my-deep-red 'my-light-red) + erlang-font-lock-keywords-attr)) + +For a more elaborate example, please see the beginning of the file +`erlang.el'." + (let ((res '())) + (while ks + (let* ((regexp (car (car ks))) + (number (car (cdr (car ks)))) + (new-face (if (and faces (car faces)) + (car faces) + (car (cdr (cdr (car ks)))))) + (overwrite (car (cdr (cdr (cdr (car ks)))))) + (new-keyword (list regexp number new-face))) + (if overwrite (nconc new-keyword (list overwrite))) + (setq res (cons new-keyword res)) + (setq ks (cdr ks)) + (if (and faces (cdr faces)) + (setq faces (cdr faces))))) + (nreverse res))) + + +(defun erlang-font-lock-level-0 () + ;; DocStringOrig: font-cmd + "Unfontify current buffer." + (interactive) + (font-lock-mode 0)) + + +(defun erlang-font-lock-level-1 () + ;; DocStringCopy: font-cmd + "Fontify current buffer at level 1. +This highlights function headers, reserved keywords, strings and comments." + (interactive) + (require 'font-lock) + (set 'font-lock-keywords erlang-font-lock-keywords-1) + (font-lock-mode 1) + (funcall (symbol-function 'font-lock-fontify-buffer))) + + +(defun erlang-font-lock-level-2 () + ;; DocStringCopy: font-cmd + "Fontify current buffer at level 2. +This highlights level 1 features (see `erlang-font-lock-level-1') +plus bifs, guards and `single quotes'." + (interactive) + (require 'font-lock) + (set 'font-lock-keywords erlang-font-lock-keywords-2) + (font-lock-mode 1) + (funcall (symbol-function 'font-lock-fontify-buffer))) + + +(defun erlang-font-lock-level-3 () + ;; DocStringCopy: font-cmd + "Fontify current buffer at level 3. +This highlights level 2 features (see `erlang-font-lock-level-2') +plus variables, macros and records." + (interactive) + (require 'font-lock) + (set 'font-lock-keywords erlang-font-lock-keywords-3) + (font-lock-mode 1) + (funcall (symbol-function 'font-lock-fontify-buffer))) + +(defun erlang-font-lock-level-4 () + ;; DocStringCopy: font-cmd + "Fontify current buffer at level 4. +This highlights level 3 features (see `erlang-font-lock-level-2') +plus variables, macros and records." + (interactive) + (require 'font-lock) + (set 'font-lock-keywords erlang-font-lock-keywords-4) + (font-lock-mode 1) + (funcall (symbol-function 'font-lock-fontify-buffer))) + + +(defun erlang-menu-init () + "Init menus for Erlang mode. + +The variable `erlang-menu-items' contain a description of the Erlang +mode menu. Normally, the list contains atoms, representing variables +bound to pieces of the menu. + +Personal extensions could be added to `erlang-menu-personal-items'. + +This function should be called if any variable describing the +menu configuration is changed." + (erlang-menu-install "Erlang" erlang-menu-items erlang-mode-map t)) + + +(defun erlang-menu-install (name items keymap &optional popup) + "Install a menu in Emacs or XEmacs based on an abstract description. + +NAME is the name of the menu. + +ITEMS is a list. The elements are either nil representing a horizontal +line or a list with two or three elements. The first is the name of +the menu item, the second the function to call, or a submenu, on the +same same form as ITEMS. The third optional element is an expression +which is evaluated every time the menu is displayed. Should the +expression evaluate to nil the menu item is ghosted. + +KEYMAP is the keymap to add to menu to. (When using XEmacs, the menu +will only be visible when this menu is the global, the local, or an +activate minor mode keymap.) + +If POPUP is non-nil, the menu is bound to the XEmacs `mode-popup-menu' +variable, i.e. it will popup when pressing the right mouse button. + +Please see the variable `erlang-menu-base-items'." + (cond (erlang-xemacs-p + (let ((menu (erlang-menu-xemacs name items keymap))) + ;; We add the menu to the global menubar. + ;;(funcall (symbol-function 'set-buffer-menubar) + ;; (symbol-value 'current-menubar)) + (funcall (symbol-function 'add-submenu) nil menu) + (setcdr erlang-xemacs-popup-menu (cdr menu)) + (if (and popup (boundp 'mode-popup-menu)) + (funcall (symbol-function 'set) + 'mode-popup-menu erlang-xemacs-popup-menu)))) + ((>= erlang-emacs-major-version 19) + (define-key keymap (vector 'menu-bar (intern name)) + (erlang-menu-make-keymap name items))) + (t nil))) + + +(defun erlang-menu-make-keymap (name items) + "Build a menu for Emacs 19." + (let ((menumap (funcall (symbol-function 'make-sparse-keymap) + name)) + (count 0) + id def first second third) + (setq items (reverse items)) + (while items + ;; Replace any occurrence of atoms by their value. + (while (and items (atom (car items)) (not (null (car items)))) + (if (and (boundp (car items)) + (listp (symbol-value (car items)))) + (setq items (append (reverse (symbol-value (car items))) + (cdr items))) + (setq items (cdr items)))) + (setq first (car-safe (car items))) + (setq second (car-safe (cdr-safe (car items)))) + (setq third (car-safe (cdr-safe (cdr-safe (car items))))) + (cond ((null first) + (setq count (+ count 1)) + (setq id (intern (format "separator-%d" count))) + (setq def '("--" . nil))) + ((and (consp second) (eq (car second) 'lambda)) + (setq count (+ count 1)) + (setq id (intern (format "lambda-%d" count))) + (setq def (cons first second))) + ((symbolp second) + (setq id second) + (setq def (cons first second))) + (t + (setq count (+ count 1)) + (setq id (intern (format "submenu-%d" count))) + (setq def (erlang-menu-make-keymap first second)))) + (define-key menumap (vector id) def) + (if third + (put id 'menu-enable third)) + (setq items (cdr items))) + (cons name menumap))) + + +(defun erlang-menu-xemacs (name items &optional keymap) + "Build a menu for XEmacs." + (let ((res '()) + first second third entry) + (while items + ;; Replace any occurrence of atoms by their value. + (while (and items (atom (car items)) (not (null (car items)))) + (if (and (boundp (car items)) + (listp (symbol-value (car items)))) + (setq items (append (reverse (symbol-value (car items))) + (cdr items))) + (setq items (cdr items)))) + (setq first (car-safe (car items))) + (setq second (car-safe (cdr-safe (car items)))) + (setq third (car-safe (cdr-safe (cdr-safe (car items))))) + (cond ((null first) + (setq res (cons "------" res))) + ((symbolp second) + (setq res (cons (vector first second (or third t)) res))) + ((and (consp second) (eq (car second) 'lambda)) + (setq res (cons (vector first (list 'call-interactively second) + (or third t)) res))) + (t + (setq res (cons (cons first + (cdr (erlang-menu-xemacs + first second))) + res)))) + (setq items (cdr items))) + (setq res (reverse res)) + ;; When adding a menu to a minor-mode keymap under Emacs, + ;; it disappears when the mode is disabled. The expression + ;; generated below imitates this behaviour. + ;; (This could be expressed much clearer using backquotes, + ;; but I don't want to pull in every package.) + (if keymap + (let ((expr (list 'or + (list 'eq keymap 'global-map) + (list 'eq keymap (list 'current-local-map)) + (list 'symbol-value + (list 'car-safe + (list 'rassq + keymap + 'minor-mode-map-alist)))))) + (setq res (cons ':included (cons expr res))))) + (cons name res))) + + +(defun erlang-menu-substitute (items alist) + "Substitute functions in menu described by ITEMS. + +The menu ITEMS is updated destructively. + +ALIST is list of pairs where the car is the old function and cdr the new." + (let (first second pair) + (while items + (setq first (car-safe (car items))) + (setq second (car-safe (cdr-safe (car items)))) + (cond ((null first)) + ((symbolp second) + (setq pair (and second (assq second alist))) + (if pair + (setcar (cdr (car items)) (cdr pair)))) + ((and (consp second) (eq (car second) 'lambda))) + (t + (erlang-menu-substitute second alist))) + (setq items (cdr items))))) + + +(defun erlang-menu-add-above (entry above items) + "Add menu ENTRY above menu entry ABOVE in menu ITEMS. +Do nothing if the items already should be in the menu. +Should ABOVE not be in the list, the entry is added at +the bottom of the menu. + +The new menu is returned. No guarantee is given that the original +menu is left unchanged. + +The equality test is performed by `eq'. + +Example: (erlang-menu-add-above 'my-erlang-menu-items + 'erlang-menu-man-items)" + (erlang-menu-add-below entry above items t)) + + +(defun erlang-menu-add-below (entry below items &optional above-p) + "Add menu ENTRY below menu items BELOW in the Erlang menu. +Do nothing if the items already should be in the menu. +Should BELOW not be in the list, items is added at the bottom +of the menu. + +The new menu is returned. No guarantee is given that the original +menu is left unchanged. + +The equality test is performed by `eq'. + +Example: + +\(setq erlang-menu-items + (erlang-menu-add-below 'my-erlang-menu-items + 'erlang-menu-base-items + erlang-menu-items))" + (if (memq entry items) + items ; Return the original menu. + (let ((head '()) + (done nil) + res) + (while (not done) + (cond ((null items) + (setq res (append head (list entry))) + (setq done t)) + ((eq below (car items)) + (setq res + (if above-p + (append head (cons entry items)) + (append head (cons (car items) + (cons entry (cdr items)))))) + (setq done t)) + (t + (setq head (append head (list (car items)))) + (setq items (cdr items))))) + res))) + +(defun erlang-menu-delete (entry items) + "Delete ENTRY from menu ITEMS. + +The new menu is returned. No guarantee is given that the original +menu is left unchanged." + (delq entry items)) + +;; Man code: + +(defun erlang-man-init () + "Add menus containing the manual pages of the Erlang. + +The variable `erlang-man-dirs' contains entries describing +the location of the manual pages." + (interactive) + (if erlang-man-inhibit + () + (setq erlang-menu-man-items + '(nil + ("Man - Function" erlang-man-function))) + (if erlang-man-dirs + (setq erlang-menu-man-items + (append erlang-menu-man-items + (erlang-man-make-top-menu erlang-man-dirs)))) + (setq erlang-menu-items + (erlang-menu-add-above 'erlang-menu-man-items + 'erlang-menu-version-items + erlang-menu-items)) + (erlang-menu-init))) + + +(defun erlang-man-uninstall () + "Remove the man pages from the Erlang mode." + (interactive) + (setq erlang-menu-items + (erlang-menu-delete 'erlang-menu-man-items erlang-menu-items)) + (erlang-menu-init)) + + +;; The man menu is a hierarchal structure, with the manual sections +;; at the top, described by `erlang-man-dirs'. The next level could +;; either be the manual pages if not to many, otherwise it is an index +;; menu whose submenus will contain up to `erlang-man-max-menu-size' +;; manual pages. + +(defun erlang-man-make-top-menu (dir-list) + "Create one menu entry per element of DIR-LIST. +The format is described in the documentation of `erlang-man-dirs'." + (let ((menu '()) + dir) + (while dir-list + (setq dir (cond ((nth 2 (car dir-list)) + ;; Relative to `erlang-root-dir'. + (and (stringp erlang-root-dir) + (concat erlang-root-dir (nth 1 (car dir-list))))) + (t + ;; Absolute + (nth 1 (car dir-list))))) + (if (and dir + (file-readable-p dir)) + (setq menu (cons (list (car (car dir-list)) + (erlang-man-make-middle-menu + (erlang-man-get-files dir))) + menu))) + (setq dir-list (cdr dir-list))) + ;; Should no menus be found, generate a menu item which + ;; will display a help text, when selected. + (if menu + (nreverse menu) + '(("Man Pages" + (("Error! Why?" erlang-man-describe-error))))))) + + +;; Should the menu be to long, let's split it into a number of +;; smaller menus. Warning, this code contains beautiful +;; destructive operations! +(defun erlang-man-make-middle-menu (filelist) + "Create the second level menu from FILELIST. + +Should the list be longer than `erlang-man-max-menu-size', a tree of +menus is created." + (if (<= (length filelist) erlang-man-max-menu-size) + (erlang-man-make-menu filelist) + (let ((menu '()) + (filelist (copy-sequence filelist)) + segment submenu pair) + (while filelist + (setq pair (nthcdr (- erlang-man-max-menu-size 1) filelist)) + (setq segment filelist) + (if (null pair) + (setq filelist nil) + (setq filelist (cdr pair)) + (setcdr pair nil)) + (setq submenu (erlang-man-make-menu segment)) + (setq menu (cons (list (concat (car (car submenu)) + " -- " + (car (car (reverse submenu)))) + submenu) + menu))) + (nreverse menu)))) + + +(defun erlang-man-make-menu (filelist) + "Make a leaf menu based on FILELIST." + (let ((menu '()) + item) + (while filelist + (setq item (erlang-man-make-menu-item (car filelist))) + (if item + (setq menu (cons item menu))) + (setq filelist (cdr filelist))) + (nreverse menu))) + + +(defun erlang-man-make-menu-item (file) + "Create a menu item containing the name of the man page." + (and (string-match ".+/\\([^/]+\\)\\.\\([124-9]\\|3\\(erl\\)?\\)\\(\\.gz\\)?$" file) + (let ((page (substring file (match-beginning 1) (match-end 1)))) + (list (capitalize page) + (list 'lambda '() + '(interactive) + (list 'funcall 'erlang-man-display-function + file)))))) + + +(defun erlang-man-get-files (dir) + "Return files in directory DIR." + (directory-files dir t ".+\\.\\([124-9]\\|3\\(erl\\)?\\)\\(\\.gz\\)?\\'")) + + +(defun erlang-man-module (&optional module) + "Find manual page for MODULE, defaults to module of function under point. +This function is aware of imported functions." + (interactive + (list (let* ((mod (car-safe (erlang-get-function-under-point))) + (input (read-string + (format "Manual entry for module%s: " + (if (or (null mod) (string= mod "")) + "" + (format " (default %s)" mod)))))) + (if (string= input "") + mod + input)))) + (or module (setq module (car (erlang-get-function-under-point)))) + (if (or (null module) (string= module "")) + (error "No Erlang module name given")) + (let ((dir-list erlang-man-dirs) + (pat (concat "/" (regexp-quote module) "\\.\\([124-9]\\|3\\(erl\\)?\\)\\(\\.gz\\)?$")) + (file nil) + file-list) + (while (and dir-list (null file)) + (setq file-list (erlang-man-get-files + (if (nth 2 (car dir-list)) + (concat erlang-root-dir (nth 1 (car dir-list))) + (nth 1 (car dir-list))))) + (while (and file-list (null file)) + (if (string-match pat (car file-list)) + (setq file (car file-list))) + (setq file-list (cdr file-list))) + (setq dir-list (cdr dir-list))) + (if file + (funcall erlang-man-display-function file) + (error "No manual page for module %s found" module)))) + + +;; Warning, the function `erlang-man-function' is a hack! +;; It links itself into the man code in a non-clean way. I have +;; chosen to keep it since it provides a very useful functionality +;; which is not possible to achieve using a clean approach. +;; / AndersL + +(defvar erlang-man-function-name nil + "Name of function for last `erlang-man-function' call. +Used for communication between `erlang-man-function' and the +patch to `Man-notify-when-ready'.") + +(defun erlang-man-function (&optional name) + "Find manual page for NAME, where NAME is module:function. +The entry for `function' is displayed. + +This function is aware of imported functions." + (interactive + (list (let* ((mod-func (erlang-get-function-under-point)) + (mod (car-safe mod-func)) + (func (nth 1 mod-func)) + (input (read-string + (format + "Manual entry for `module:func' or `module'%s: " + (if (or (null mod) (string= mod "")) + "" + (format " (default %s:%s)" mod func)))))) + (if (string= input "") + (if (and mod func) + (concat mod ":" func) + mod) + input)))) + ;; Emacs 18 doesn't provide `man'... + (condition-case nil + (require 'man) + (error nil)) + (let ((modname nil) + (funcname nil)) + (cond ((null name) + (let ((mod-func (erlang-get-function-under-point))) + (setq modname (car-safe mod-func)) + (setq funcname (nth 1 mod-func)))) + ((string-match ":" name) + (setq modname (substring name 0 (match-beginning 0))) + (setq funcname (substring name (match-end 0) nil))) + ((stringp name) + (setq modname name))) + (if (or (null modname) (string= modname "")) + (error "No Erlang module name given")) + (cond ((fboundp 'Man-notify-when-ready) + ;; Emacs 19: The man command could possibly start an + ;; asynchronous process, i.e. we must hook ourselves into + ;; the system to be activated when the man-process + ;; terminates. + (if (null funcname) + () + (erlang-man-patch-notify) + (setq erlang-man-function-name funcname)) + (condition-case nil + (erlang-man-module modname) + (error (setq erlang-man-function-name nil)))) + (t + (erlang-man-module modname) + (if funcname + (erlang-man-find-function + (or (get-buffer "*Manual Entry*") ; Emacs 18 + (current-buffer)) ; XEmacs + funcname)))))) + + +;; Should the defadvice be at the top level, the package `advice' would +;; be required. Now it is only required when this functionality +;; is used. (Emacs 19 specific.) +(defun erlang-man-patch-notify () + "Patch the function `Man-notify-when-ready' to search for function. +The variable `erlang-man-function-name' is assumed to be bound to +the function name, or to nil. + +The reason for patching a function is that under Emacs 19, the man +command is executed asynchronously." + (condition-case nil + (require 'advice) + ;; This should never happened since this is only called when + ;; running under Emacs 19. + (error (error (concat "This command needs the package `advice', " + "please upgrade your Emacs.")))) + (require 'man) + (defadvice Man-notify-when-ready + (after erlang-Man-notify-when-ready activate) + "Set point at the documentation of the function name in +`erlang-man-function-name' when the man page is displayed." + (if erlang-man-function-name + (erlang-man-find-function (ad-get-arg 0) erlang-man-function-name)) + (setq erlang-man-function-name nil))) + + +(defun erlang-man-find-function (buf func) + "Find manual page for function in `erlang-man-function-name' in buffer BUF." + (if func + (let ((win (get-buffer-window buf))) + (if win + (progn + (set-buffer buf) + (goto-char (point-min)) + (if (re-search-forward + (concat "^[ \t]+" func " ?(") + (point-max) t) + (progn + (forward-word -1) + (set-window-point win (point))) + (message "Could not find function `%s'" func))))))) + + +(defun erlang-man-display (file) + "Display FILE as a `man' file. +This is the default manual page display function. +The variables `erlang-man-display-function' contains the function +to be used." + ;; Emacs 18 doesn't `provide' man. + (condition-case nil + (require 'man) + (error nil)) + (if file + (let ((process-environment (copy-sequence process-environment))) + (if (string-match "\\(.*\\)/man[^/]*/\\([^.]+\\)\\.\\([124-9]\\|3\\(erl\\)?\\)\\(\\.gz\\)?$" file) + (let ((dir (substring file (match-beginning 1) (match-end 1))) + (page (substring file (match-beginning 2) (match-end 2)))) + (if (fboundp 'setenv) + (setenv "MANPATH" dir) + ;; Emacs 18 + (setq process-environment (cons (concat "MANPATH=" dir) + process-environment))) + (cond ((not (and (not erlang-xemacs-p) + (= erlang-emacs-major-version 19) + (< erlang-emacs-minor-version 29))) + (manual-entry page)) + (t + ;; Emacs 19.28 and earlier versions of 19: + ;; The manual-entry command unconditionally prompts + ;; the user :-( + (funcall (symbol-function 'Man-getpage-in-background) + page)))) + (error "Can't find man page for %s\n" file))))) + + +(defun erlang-man-describe-error () + "Describe why the manual pages weren't found." + (interactive) + (with-output-to-temp-buffer "*Erlang Man Error*" + (princ "Normally, this menu should contain Erlang manual pages. + +In order to find the manual pages, the variable `erlang-root-dir' +should be bound to the name of the directory containing the Erlang +installation. The name should not include the final slash. + +Practically, you should add a line on the following form to +your ~/.emacs, or ask your system administrator to add it to +the site init file: + (setq erlang-root-dir \"/the/erlang/root/dir/goes/here\") + +For example: + (setq erlang-root-dir \"/usr/local/erlang\") + +After installing the line, kill and restart Emacs, or restart Erlang +mode with the command `M-x erlang-mode RET'."))) + +;; Skeleton code: + +;; This code is based on the package `tempo' which is part of modern +;; Emacsen. (GNU Emacs 19.25 (?) and XEmacs 19.14.) + +(defun erlang-skel-init () + "Generate the skeleton functions and menu items. +The variable `erlang-skel' contains the name and descriptions of +all skeletons. + +The skeleton routines are based on the `tempo' package. Should this +package not be present, this function does nothing." + (interactive) + (condition-case nil + (require 'tempo) + (error t)) + (if (featurep 'tempo) + (let ((skel erlang-skel) + (menu '())) + (while skel + (cond ((null (car skel)) + (setq menu (cons nil menu))) + (t + (funcall (symbol-function 'tempo-define-template) + (concat "erlang-" (nth 1 (car skel))) + ;; The tempo template used contains an `include' + ;; function call only, hence changes to the + ;; variables describing the templates take effect + ;; immdiately. + (list (list 'erlang-skel-include (nth 2 (car skel)))) + (nth 1 (car skel)) + (car (car skel)) + 'erlang-tempo-tags) + (setq menu (cons (erlang-skel-make-menu-item + (car skel)) menu)))) + (setq skel (cdr skel))) + (setq erlang-menu-skel-items + (list nil (list "Skeletons" (nreverse menu)))) + (setq erlang-menu-items + (erlang-menu-add-above 'erlang-menu-skel-items + 'erlang-menu-version-items + erlang-menu-items)) + (erlang-menu-init)))) + +(defun erlang-skel-make-menu-item (skel) + (let ((func (intern (concat "tempo-template-erlang-" (nth 1 skel))))) + (cond ((null (nth 3 skel)) + (list (car skel) func)) + (t + (list (car skel) + (list 'lambda '() + '(interactive) + (list 'funcall + (list 'quote (nth 3 skel)) + (list 'quote func)))))))) + +;; Functions designed to be added to the skeleton menu. +;; (Not normally used) +(defun erlang-skel-insert (func) + "Insert skeleton generated by FUNC and goto first tempo mark." + (save-excursion (funcall func)) + (funcall (symbol-function 'tempo-forward-mark))) + +(defun erlang-skel-header (func) + "Insert the header generated by FUNC at the beginning of the buffer." + (goto-char (point-min)) + (save-excursion (funcall func)) + (funcall (symbol-function 'tempo-forward-mark))) + + +;; Functions used inside the skeleton descriptions. +(defun erlang-skel-skip-blank () + (skip-chars-backward " \t") + nil) + +(defun erlang-skel-include (&rest args) + "Include a template inside another template. + +Example of use, assuming that `erlang-skel-func' is defined: + + (defvar foo-skeleton '(\"%%% New function:\" + (erlang-skel-include erlang-skel-func))) + +Technically, this function returns the `tempo' attribute`(l ...)' which +can contain other `tempo' attributes. Please see the function +`tempo-define-template' for a description of the `(l ...)' attribute." + (let ((res '()) + entry) + (while args + (setq entry (car args)) + (while entry + (setq res (cons (car entry) res)) + (setq entry (cdr entry))) + (setq args (cdr args))) + (cons 'l (nreverse res)))) + +(defvar erlang-skel-separator-length 70) + +(defun erlang-skel-separator (&optional percent) + "Return a comment separator." + (let ((percent (or percent 3))) + (concat (make-string percent ?%) + (make-string (- erlang-skel-separator-length percent) ?-) + "\n"))) + +(defun erlang-skel-double-separator (&optional percent) + "Return a comment separator." + (let ((percent (or percent 3))) + (concat (make-string percent ?%) + (make-string (- erlang-skel-separator-length percent) ?=) + "\n"))) + +(defun erlang-skel-dd-mmm-yyyy () + "Return the current date as a string in \"DD Mon YYYY\" form. +The first character of DD is space if the value is less than 10." + (let ((date (current-time-string))) + (format "%2d %s %s" + (erlang-string-to-int (substring date 8 10)) + (substring date 4 7) + (substring date -4)))) + +;; Indentation code: + +(defun erlang-indent-command (&optional whole-exp) + "Indent current line as Erlang code. +With argument, indent any additional lines of the same clause +rigidly along with this one." + (interactive "P") + (if whole-exp + ;; If arg, always indent this line as Erlang + ;; and shift remaining lines of clause the same amount. + (let ((shift-amt (erlang-indent-line)) + beg end) + (save-excursion + (if erlang-tab-always-indent + (beginning-of-line)) + (setq beg (point)) + (erlang-end-of-clause 1) + (setq end (point)) + (goto-char beg) + (forward-line 1) + (setq beg (point))) + (if (> end beg) + (indent-code-rigidly beg end shift-amt "\n"))) + (if (and (not erlang-tab-always-indent) + (save-excursion + (skip-chars-backward " \t") + (not (bolp)))) + (insert-tab) + (erlang-indent-line)))) + + +(defun erlang-indent-line () + "Indent current line as Erlang code. +Return the amount the indentation changed by." + (let ((pos (- (point-max) (point))) + indent beg + shift-amt) + (beginning-of-line 1) + (setq beg (point)) + (skip-chars-forward " \t") + (cond ((looking-at "%") + (setq indent (funcall comment-indent-function)) + (setq shift-amt (- indent (current-column)))) + (t + (setq indent (erlang-calculate-indent)) + (cond ((null indent) + (setq indent (current-indentation))) + ((eq indent t) + ;; This should never occur here. + (error "Erlang mode error")) + ;;((= (char-syntax (following-char)) ?\)) + ;; (setq indent (1- indent))) + ) + (setq shift-amt (- indent (current-column))))) + (if (zerop shift-amt) + nil + (delete-region beg (point)) + (indent-to indent)) + ;; If initial point was within line's indentation, position + ;; after the indentation. Else stay at same point in text. + (if (> (- (point-max) pos) (point)) + (goto-char (- (point-max) pos))) + shift-amt)) + + +(defun erlang-indent-region (beg end) + "Indent region of Erlang code. + +This is automagically called by the user level function `indent-region'." + (interactive "r") + (save-excursion + (let ((case-fold-search nil) + (continue t) + (from-end (- (point-max) end)) + indent-point;; The beginning of the current line + indent;; The indent amount + state) + (goto-char beg) + (beginning-of-line) + (setq indent-point (point)) + (erlang-beginning-of-clause) + ;; Parse the Erlang code from the beginning of the clause to + ;; the beginning of the region. + (while (< (point) indent-point) + (setq state (erlang-partial-parse (point) indent-point state))) + ;; Indent every line in the region + (while continue + (goto-char indent-point) + (skip-chars-forward " \t") + (cond ((looking-at "%") + ;; Do not use our stack to help the user to customize + ;; comment indentation. + (setq indent (funcall comment-indent-function))) + ((looking-at "$") + ;; Don't indent empty lines. + (setq indent 0)) + (t + (setq indent + (save-excursion + (erlang-calculate-stack-indent (point) state))) + (cond ((null indent) + (setq indent (current-indentation))) + ((eq indent t) + ;; This should never occur here. + (error "Erlang mode error")) + ;;((= (char-syntax (following-char)) ?\)) + ;; (setq indent (1- indent))) + ))) + (if (zerop (- indent (current-column))) + nil + (delete-region indent-point (point)) + (indent-to indent)) + ;; Find the next line in the region + (goto-char indent-point) + (save-excursion + (forward-line 1) + (setq indent-point (point))) + (if (>= from-end (- (point-max) indent-point)) + (setq continue nil) + (while (< (point) indent-point) + (setq state (erlang-partial-parse + (point) indent-point state)))))))) + + +(defun erlang-indent-current-buffer () + "Indent current buffer as Erlang code." + (interactive) + (save-excursion + (save-restriction + (widen) + (erlang-indent-region (point-min) (point-max))))) + + +(defun erlang-indent-function () + "Indent current Erlang function." + (interactive) + (save-excursion + (let ((end (progn (erlang-end-of-function 1) (point))) + (beg (progn (erlang-beginning-of-function 1) (point)))) + (erlang-indent-region beg end)))) + + +(defun erlang-indent-clause () + "Indent current Erlang clause." + (interactive) + (save-excursion + (let ((end (progn (erlang-end-of-clause 1) (point))) + (beg (progn (erlang-beginning-of-clause 1) (point)))) + (erlang-indent-region beg end)))) + + +(defmacro erlang-push (x stack) (list 'setq stack (list 'cons x stack))) +(defmacro erlang-pop (stack) (list 'setq stack (list 'cdr stack))) +;; Would much prefer to make caddr a macro but this clashes. +(defun erlang-caddr (x) (car (cdr (cdr x)))) + + +(defun erlang-calculate-indent (&optional parse-start) + "Compute appropriate indentation for current line as Erlang code. +Return nil if line starts inside string, t if in a comment." + (save-excursion + (let ((indent-point (point)) + (case-fold-search nil) + (state nil)) + (if parse-start + (goto-char parse-start) + (erlang-beginning-of-clause)) + (while (< (point) indent-point) + (setq state (erlang-partial-parse (point) indent-point state))) + (erlang-calculate-stack-indent indent-point state)))) + +(defun erlang-show-syntactic-information () + "Show syntactic information for current line." + + (interactive) + + (save-excursion + (let ((starting-point (point)) + (case-fold-search nil) + (state nil)) + (erlang-beginning-of-clause) + (while (< (point) starting-point) + (setq state (erlang-partial-parse (point) starting-point state))) + (message "%S" state)))) + + +(defun erlang-partial-parse (from to &optional state) + "Parse Erlang syntax starting at FROM until TO, with an optional STATE. +Value is list (stack token-start token-type in-what)." + (goto-char from) ; Start at the beginning + (erlang-skip-blank to) + (let ((cs (char-syntax (following-char))) + (stack (car state)) + (token (point)) + in-what) + (cond + + ;; Done: Return previous state. + ((>= token to) + (setq token (nth 1 state)) + (setq cs (nth 2 state)) + (setq in-what (nth 3 state))) + + ;; Word constituent: check and handle keywords. + ((= cs ?w) + (cond ((looking-at "\\(end\\|after\\)[^_a-zA-Z0-9]") + ;; Must pop top icr layer, `after' will push a new + ;; layer next. + (progn + (while (and stack (eq (car (car stack)) '->)) + (erlang-pop stack)) + (if (and stack (memq (car (car stack)) '(icr begin fun try))) + (erlang-pop stack)))) + ((looking-at "catch.*of") + t) + ((looking-at "catch\\s *\\($\\|%\\|.*->\\)") + ;; Must pop top icr layer, `catch' in try/catch + ;;will push a new layer next. + (progn + (while (and stack (eq (car (car stack)) '->)) + (erlang-pop stack)) + (if (and stack (memq (car (car stack)) '(icr begin try))) + (erlang-pop stack)))) + ) + (cond ((looking-at "\\(if\\|case\\|receive\\)[^_a-zA-Z0-9]") + ;; Must push a new icr (if/case/receive) layer. + (erlang-push (list 'icr token (current-column)) stack)) + ((looking-at "\\(try\\|after\\)[^_a-zA-Z0-9]") + ;; Must handle separately, try catch or try X of -> catch + ;; same for `after', it could be + ;; receive after Time -> X end, or + ;; try after X end + (erlang-push (list 'try token (current-column)) stack)) + ((looking-at "\\(of\\)[^_a-zA-Z0-9]") + ;; Must handle separately, try X of -> catch + (if (and stack (eq (car (car stack)) 'try)) + (let ((try-column (nth 2 (car stack)))) + (erlang-pop stack) + (erlang-push (list 'icr token try-column) stack)))) + + ((looking-at "\\(fun\\)[^_a-zA-Z0-9]") + ;; Push a new layer if we are defining a `fun' + ;; expression, not when we are refering an existing + ;; function. 'fun's defines are only indented one level now. + (if (save-excursion + (goto-char (match-end 1)) + (erlang-skip-blank to) + (eq (following-char) ?\()) + (erlang-push (list 'fun token (current-column)) stack))) + ((looking-at "\\(begin\\|query\\)[^_a-zA-Z0-9]") + (erlang-push (list 'begin token (current-column)) stack)) + ;; Normal when case + ;;((looking-at "when\\s ") + ;;((looking-at "when\\s *\\($\\|%\\)") + ((looking-at "when[^_a-zA-Z0-9]") + (erlang-push (list 'when token (current-column)) stack)) + ((looking-at "catch.*of") + t) + ((looking-at "catch\\s *\\($\\|%\\|.*->\\)") + (erlang-push (list 'icr token (current-column)) stack)) + ;;(erlang-push (list '-> token (current-column)) stack)) + ;;((looking-at "^of$") + ;; (erlang-push (list 'icr token (current-column)) stack) + ;;(erlang-push (list '-> token (current-column)) stack)) + ) + (forward-sexp 1)) + ;; String: Try to skip over it. (Catch error if not complete.) + ((= cs ?\") + (condition-case nil + (progn + (forward-sexp 1) + (if (> (point) to) + (progn + (setq in-what 'string) + (goto-char to)))) + (error + (setq in-what 'string) + (goto-char to)))) + + ;; Expression prefix e.i. $ or ^ (Note ^ can be in the character + ;; literal $^ or part of string and $ outside of a string denotes + ;; a character literal) + ((= cs ?') + (cond + ((= (following-char) ?\") ;; $ or ^ was the last char in a string + (forward-char 1)) + (t + ;; Maybe a character literal, quote the next char to avoid + ;; situations as $" being seen as the begining of a string. + ;; Note the quoting something in the middle of a string is harmless. + (quote (following-char)) + (forward-char 1)))) + + ;; Symbol constituent or punctuation + + ((memq cs '(?. ?_)) + (cond + + ;; Clause end + ((= (following-char) ?\;) + (if (and stack (and (eq (car (car stack)) 'when) + (eq (car (car (cdr (cdr stack)))) 'spec))) + (erlang-pop stack)) + (if (and stack (eq (car (car stack)) '->)) + (erlang-pop stack)) + (forward-char 1)) + + ;; Parameter separator + ((looking-at ",") + (forward-char 1) + (if (and stack (eq (car (car stack)) '::)) + ;; Type or spec + (erlang-pop stack))) + + ;; Function end + ((looking-at "\\.\\(\\s \\|\n\\|\\s<\\)") + (setq stack nil) + (forward-char 1)) + + ;; Function head + ((looking-at "->") + (if (and stack (eq (car (car stack)) 'when)) + (erlang-pop stack)) + (erlang-push (list '-> token (current-column)) stack) + (forward-char 2)) + + ;; List-comprehension divider + ((looking-at "||") + (erlang-push (list '|| token (current-column)) stack) + (forward-char 2)) + + ;; Bit-syntax open paren + ((looking-at "<<") + (erlang-push (list '<< token (current-column)) stack) + (forward-char 2)) + + ;; Bbit-syntax close paren + ((looking-at ">>") + (while (memq (car (car stack)) '(|| ->)) + (erlang-pop stack)) + (cond ((eq (car (car stack)) '<<) + (erlang-pop stack)) + ((memq (car (car stack)) '(icr begin fun)) + (error "Missing `end'")) + (t + (error "Unbalanced parentheses"))) + (forward-char 2)) + + ;; Macro + ((= (following-char) ??) + ;; Skip over the ? + (forward-char 1) + ) + + ;; Type spec's + ((looking-at "-type\\s \\|-opaque\\s ") + (if stack + (forward-char 1) + (erlang-push (list 'icr token (current-column)) stack) + (forward-char 6))) + ((looking-at "-spec\\s ") + (if stack + (forward-char 1) + (forward-char 6) + (skip-chars-forward "^(\n") + (erlang-push (list 'spec (point) (current-column)) stack) + )) + + ;; Type spec delimiter + ((looking-at "::") + (erlang-push (list ':: token (current-column)) stack) + (forward-char 2)) + + ;; Don't follow through in the clause below + ;; '|' don't need spaces around it + ((looking-at "|") + (forward-char 1)) + + ;; Other punctuation: Skip over it and any following punctuation + ((= cs ?.) + ;; Skip over all characters in the operand. + (skip-syntax-forward ".")) + + ;; Other char: Skip over it. + (t + (forward-char 1)))) + + ;; Open parenthesis + ((= cs ?\() + (erlang-push (list '\( token (current-column)) stack) + (forward-char 1)) + + ;; Close parenthesis + ((= cs ?\)) + (while (memq (car (car stack)) '(|| -> :: when)) + (erlang-pop stack)) + (cond ((eq (car (car stack)) '\() + (erlang-pop stack) + (if (and (eq (car (car stack)) 'fun) + (eq (car (car (cdr stack))) '::)) + ;; Inside fun type def ') closes fun definition + (erlang-pop stack))) + ((eq (car (car stack)) 'icr) + (erlang-pop stack) + ;; Normal catch not try-catch might have caused icr + ;; and then incr should be removed and is not an error. + (if (eq (car (car stack)) '\() + (erlang-pop stack) + (error "Missing `end'") + )) + ((eq (car (car stack)) 'begin) + (error "Missing `end'")) + (t + (error "Unbalanced parenthesis")) + ) + (forward-char 1)) + + ;; Character quote: Skip it and the quoted char. + ((= cs ?/) + (forward-char 2)) + + ;; Character escape: Skip it and the escape sequence. + ((= cs ?\\) + (forward-char 1) + (skip-syntax-forward "w")) + + ;; Everything else + (t + (forward-char 1))) + (list stack token cs in-what))) + +(defun erlang-calculate-stack-indent (indent-point state) + "From the given last position and state (stack) calculate indentation. +Return nil if inside string, t if in a comment." + (let* ((stack (and state (car state))) + (token (nth 1 state)) + (stack-top (and stack (car stack)))) + (cond ((null state) ;No state + 0) + ((nth 3 state) + ;; Return nil or t. + (eq (nth 3 state) 'comment)) + ((null stack) + (if (looking-at "when[^_a-zA-Z0-9]") + erlang-indent-guard + 0)) + ((eq (car stack-top) '\() + ;; Element of list, tuple or part of an expression, + (cond ((null erlang-argument-indent) + ;; indent to next column. + (1+ (nth 2 stack-top))) + ((= (char-syntax (following-char)) ?\)) + (goto-char (nth 1 stack-top)) + (cond ((looking-at "[({]\\s *\\($\\|%\\)") + ;; Line ends with parenthesis. + (let ((previous (erlang-indent-find-preceding-expr)) + (stack-pos (nth 2 stack-top))) + (if (>= previous stack-pos) stack-pos + (- (+ previous erlang-argument-indent) 1)))) + (t + (nth 2 stack-top)))) + (t + (goto-char (nth 1 stack-top)) + (cond ((looking-at "[({]\\s *\\($\\|%\\)") + ;; Line ends with parenthesis. + (erlang-indent-parenthesis (nth 2 stack-top))) + (t + ;; Indent to the same column as the first + ;; argument. + (goto-char (1+ (nth 1 stack-top))) + (skip-chars-forward " \t") + (current-column)))))) + ;; + ((eq (car stack-top) '<<) + ;; Element of binary (possible comprehension) expression, + (cond ((null erlang-argument-indent) + ;; indent to next column. + (+ 2 (nth 2 stack-top))) + ((looking-at "\\(>>\\)[^_a-zA-Z0-9]") + (nth 2 stack-top)) + (t + (goto-char (nth 1 stack-top)) + ;; Indent to the same column as the first + ;; argument. + (goto-char (+ 2 (nth 1 stack-top))) + (skip-chars-forward " \t") + (current-column)))) + + ((memq (car stack-top) '(icr fun spec)) + ;; The default indentation is the column of the option + ;; directly following the keyword. (This does not apply to + ;; `case'.) Should no option be on the same line, the + ;; indentation is the indentation of the keyword + + ;; `erlang-indent-level'. + ;; + ;; `after' should be indented to the same level as the + ;; corresponding receive. + (cond ((looking-at "\\(after\\|catch\\|of\\)\\($\\|[^_a-zA-Z0-9]\\)") + (nth 2 stack-top)) + ((looking-at "when[^_a-zA-Z0-9]") + ;; Handling one when part + (+ (nth 2 stack-top) erlang-indent-level erlang-indent-guard)) + (t + (save-excursion + (goto-char (nth 1 stack-top)) + (if (looking-at "case[^_a-zA-Z0-9]") + (+ (nth 2 stack-top) erlang-indent-level) + (skip-chars-forward "a-z") + (skip-chars-forward " \t") + (if (memq (following-char) '(?% ?\n)) + (+ (nth 2 stack-top) erlang-indent-level) + (current-column)))))) + ) + ((and (eq (car stack-top) '||) (looking-at "\\(]\\|>>\\)[^_a-zA-Z0-9]")) + (nth 2 (car (cdr stack)))) + ;; Real indentation, where operators create extra indentation etc. + ((memq (car stack-top) '(-> || begin try)) + (if (looking-at "\\(of\\)[^_a-zA-Z0-9]") + (nth 2 stack-top) + (goto-char (nth 1 stack-top)) + ;; Check if there is more code after the '->' on the + ;; same line. If so use this indentation as base, else + ;; use parent indentation + 2 * level as base. + (let ((off erlang-indent-level) + (skip 2)) + (cond ((null (cdr stack))) ; Top level in function. + ((eq (car stack-top) 'begin) + (setq skip 5)) + ((eq (car stack-top) 'try) + (setq skip 5)) + ((eq (car stack-top) '->) + ;; If in fun definition use standard indent level not double + ;;(if (not (eq (car (car (cdr stack))) 'fun)) + ;; Removed it made multi clause fun's look to bad + (setq off (* 2 erlang-indent-level)))) ;; ) + (let ((base (erlang-indent-find-base stack indent-point off skip))) + ;; Special cases + (goto-char indent-point) + (cond ((looking-at "\\(end\\|after\\)\\($\\|[^_a-zA-Z0-9]\\)") + (if (eq (car stack-top) '->) + (erlang-pop stack)) + (if stack + (erlang-caddr (car stack)) + 0)) + ((looking-at "catch\\($\\|[^_a-zA-Z0-9]\\)") + (if (or (eq (car stack-top) 'try) + (eq (car (car (cdr stack))) 'icr)) + (progn + (if (eq (car stack-top) '->) + (erlang-pop stack)) + (if stack + (erlang-caddr (car stack)) + 0)) + base)) ;; old catch + (t + ;; Look at last thing to see how we are to move relative + ;; to the base. + (goto-char token) + (cond ((looking-at "||\\|,\\|->") + base) + ((erlang-at-keyword) + (+ (current-column) erlang-indent-level)) + ((or (= (char-syntax (following-char)) ?.) + (erlang-at-operator)) + (+ base erlang-indent-level)) + (t + (goto-char indent-point) + (cond ((memq (following-char) '(?\( ?{)) + ;; Function application or record. + (+ (erlang-indent-find-preceding-expr) + erlang-argument-indent)) + ;; Empty line, or end; treat it as the end of + ;; the block. (Here we have a choice: should + ;; the user be forced to reindent continued + ;; lines, or should the "end" be reindented?) + + ;; Avoid treating comments a continued line. + ((= (following-char) ?%) + base) + ;; Continued line (e.g. line beginning + ;; with an operator.) + (t (+ base erlang-indent-level))))))))) + )) + ((eq (car stack-top) 'when) + (goto-char (nth 1 stack-top)) + (if (looking-at "when\\s *\\($\\|%\\)") + (progn + (erlang-pop stack) + (if (and stack (memq (nth 0 (car stack)) '(icr fun))) + (progn + (goto-char (nth 1 (car stack))) + (+ (nth 2 (car stack)) erlang-indent-guard + ;; receive XYZ or receive + ;; XYZ + ;; This if thing does not seem to be needed + ;;(if (looking-at "[a-z]+\\s *\\($\\|%\\)") + ;; erlang-indent-level + ;; (* 2 erlang-indent-level)))) + (* 2 erlang-indent-level))) + ;;erlang-indent-level)) + (+ erlang-indent-level erlang-indent-guard))) + ;; "when" is followed by code, let's indent to the same + ;; column. + (forward-char 4) ; Skip "when" + (skip-chars-forward " \t") + (current-column))) + ;; Type and Spec indentation + ((eq (car stack-top) '::) + (cond ((null erlang-argument-indent) + ;; indent to next column. + (+ 2 (nth 2 stack-top))) + ((looking-at "::[^_a-zA-Z0-9]") + (nth 2 stack-top)) + (t + (goto-char (nth 1 stack-top)) + (cond ((looking-at "::\\s *\\($\\|%\\)") + ;; Line ends with :: + (+ (erlang-indent-find-preceding-expr 2) + erlang-argument-indent)) + ;; (* 2 erlang-indent-level)) + (t + ;; Indent to the same column as the first + ;; argument. + (goto-char (+ 2 (nth 1 stack-top))) + (skip-chars-forward " \t") + (current-column)))))) + ))) + + +(defun erlang-indent-find-base (stack indent-point &optional offset skip) + "Find the base column for current stack." + (or skip (setq skip 2)) + (or offset (setq offset erlang-indent-level)) + (save-excursion + (let* ((stack-top (car stack))) + (goto-char (nth 1 stack-top)) + (if (< skip (- (point-max) (point))) + (progn + (forward-char skip) + (if (looking-at "\\s *\\($\\|%\\)") + (progn + (if (memq (car stack-top) '(-> ||)) + (erlang-pop stack)) + ;; Take parent identation + offset, + ;; else just erlang-indent-level if no parent + (if stack + (+ (erlang-caddr (car stack)) + offset) + erlang-indent-level)) + (erlang-skip-blank indent-point) + (current-column))) + (+ (current-column) skip))))) + + +;; Does not handle `begin' .. `end'. +(defun erlang-indent-find-preceding-expr (&optional arg) + "Return the first column of the preceding expression. +This assumes that the preceding expression is either simple +\(i.e. an atom) or parenthesized." + (save-excursion + (or arg (setq arg 1)) + (forward-sexp (- arg)) + (let ((col (current-column))) + (skip-chars-backward " \t") + ;; Needed to match the colon in "'foo':'bar'". + (if (not (memq (preceding-char) '(?# ?:))) + col + (backward-char 1) + (forward-sexp -1) + (current-column))))) + +(defun erlang-indent-parenthesis (stack-position) + (let ((previous (erlang-indent-find-preceding-expr))) + (if (> previous stack-position) + (+ stack-position erlang-argument-indent) + (+ previous erlang-argument-indent)))) + +(defun erlang-skip-blank (&optional lim) + "Skip over whitespace and comments until limit reached." + (or lim (setq lim (point-max))) + (let (stop) + (while (and (not stop) (< (point) lim)) + (cond ((= (following-char) ?%) + (skip-chars-forward "^\n" lim)) + ((= (following-char) ?\n) + (skip-chars-forward "\n" lim)) + ((looking-at "\\s ") + (if (re-search-forward "\\S " lim 'move) + (forward-char -1))) + (t + (setq stop t)))) + stop)) + +(defun erlang-at-keyword () + "Are we looking at an Erlang keyword which will increase indentation?" + (looking-at (concat "\\(when\\|if\\|fun\\|case\\|begin\\|query\\|" + "of\\|receive\\|after\\|catch\\|try\\)[^_a-zA-Z0-9]"))) + +(defun erlang-at-operator () + "Are we looking at an Erlang operator?" + (looking-at + "\\(bnot\\|div\\|mod\\|band\\|bor\\|bxor\\|bsl\\|bsr\\)[^_a-zA-Z0-9]")) + +(defun erlang-comment-indent () + "Compute Erlang comment indentation. + +Used both by `indent-for-comment' and the Erlang specific indentation +commands." + (cond ((looking-at "%%%") 0) + ((looking-at "%%") + (or (erlang-calculate-indent) + (current-indentation))) + (t + (save-excursion + (skip-chars-backward " \t") + (max (if (bolp) 0 (1+ (current-column))) + comment-column))))) + +;;; Erlang movement commands + +;; All commands below work as movement commands. I.e. if the point is +;; at the end of the clause, and the command `erlang-end-of-clause' is +;; executed, the point is moved to the end of the NEXT clause. (This +;; mimics the behaviour of `end-of-defun'.) +;; +;; Personally I would like to rewrite them to be "pure", and add a set +;; of movement functions, like `erlang-next-clause', +;; `erlang-previous-clause', and the same for functions. +;; +;; The current implementation makes it hopeless to use the functions as +;; subroutines in more complex commands. /andersl + +(defun erlang-beginning-of-clause (&optional arg) + "Move backward to previous start of clause. +With argument, do this that many times. +Return t unless search stops due to end of buffer." + (interactive "p") + (or arg (setq arg 1)) + (if (< arg 0) + ;; Step back to the end of the previous line, unless we are at + ;; the beginning of the buffer. The reason for this move is + ;; that the regexp below includes the last character of the + ;; previous line. + (if (bobp) + (or (looking-at "\n") + (forward-char 1)) + (forward-char -1) + (if (looking-at "\\`\n") + (forward-char 1)))) + ;; The regexp matches a function header that isn't + ;; included in a string. + (and (re-search-forward "\\(\\`\\|\\`\n\\|[^\\]\n\\)\\(-?[a-z]\\|'\\|-\\)" + nil 'move (- arg)) + (let ((beg (match-beginning 2))) + (and beg (goto-char beg)) + t))) + +(defun erlang-end-of-clause (&optional arg) + "Move to the end of the current clause. +With argument, do this that many times." + (interactive "p") + (or arg (setq arg 1)) + (while (and (looking-at "[ \t]*[%\n]") + (zerop (forward-line 1)))) + ;; Move to the next clause. + (erlang-beginning-of-clause (- arg)) + (beginning-of-line);; Just to be sure... + (let ((continue t)) + (while (and (not (bobp)) continue) + (forward-line -1) + (skip-chars-forward " \t") + (if (looking-at "[%\n]") + nil + (end-of-line) + (setq continue nil))))) + +(defun erlang-mark-clause () + "Put mark at end of clause, point at beginning." + (interactive) + (push-mark (point)) + (erlang-end-of-clause 1) + ;; Sets the region. In Emacs 19 and XEmacs, we want to activate + ;; the region. + (condition-case nil + (push-mark (point) nil t) + (error (push-mark (point)))) + (erlang-beginning-of-clause 1) + ;; The above function deactivates the mark. + (if (boundp 'deactivate-mark) + (funcall (symbol-function 'set) 'deactivate-mark nil))) + +(defun erlang-beginning-of-function (&optional arg) + "Move backward to previous start of function. +With positive argument, do this that many times. +With negative argument, search forward. + +Return t unless search stops due to end of buffer." + (interactive "p") + (or arg (setq arg 1)) + (cond + ;; Search backward + ((> arg 0) + (while (and (> arg 0) + (and (erlang-beginning-of-clause 1) + (let ((start (point)) + (name (erlang-name-of-function)) + (arity (erlang-get-function-arity))) + ;; Note: "arity" is nil for e.g. "-import", hence + ;; two "-import" clauses are not considered to + ;; be part of the same function. + (while (and (erlang-beginning-of-clause 1) + (string-equal name + (erlang-name-of-function)) + arity + (equal arity + (erlang-get-function-arity))) + (setq start (point))) + (goto-char start) + t))) + (setq arg (1- arg)))) + ;; Search forward + ((< arg 0) + (end-of-line) + (erlang-beginning-of-clause 1) + ;; Step -arg functions forward. + (while (and (< arg 0) + ;; Step one function forward, or stop if the end of + ;; the buffer was reached. Return t if we found the + ;; function. + (let ((name (erlang-name-of-function)) + (arity (erlang-get-function-arity)) + (found (erlang-beginning-of-clause -1))) + (while (and found + (string-equal name (erlang-name-of-function)) + arity + (equal arity + (erlang-get-function-arity))) + (setq found (erlang-beginning-of-clause -1))) + found)) + (setq arg (1+ arg))))) + (zerop arg)) + + +(defun erlang-end-of-function (&optional arg) + "Move forward to next end of function. + +With argument, do this that many times. +With negative argument go towards the beginning of the buffer." + (interactive "p") + (or arg (setq arg 1)) + (let ((first t)) + ;; Forward + (while (and (> arg 0) (< (point) (point-max))) + (let ((pos (point))) + (while (progn + (if (and first + (progn + (forward-char 1) + (erlang-beginning-of-clause 1))) + nil + (or (bobp) (forward-char -1)) + (erlang-beginning-of-clause -1)) + (setq first nil) + (erlang-pass-over-function) + (skip-chars-forward " \t") + (if (looking-at "[%\n]") + (forward-line 1)) + (<= (point) pos)))) + (setq arg (1- arg))) + ;; Backward + (while (< arg 0) + (let ((pos (point))) + (erlang-beginning-of-clause 1) + (erlang-pass-over-function) + (forward-line 1) + (if (>= (point) pos) + (if (erlang-beginning-of-function 2) + (progn + (erlang-pass-over-function) + (skip-chars-forward " \t") + (if (looking-at "[%\n]") + (forward-line 1))) + (goto-char (point-min))))) + (setq arg (1+ arg))))) + +(eval-and-compile + (if (default-boundp 'beginning-of-defun-function) + (defalias 'erlang-mark-function 'mark-defun) + (defun erlang-mark-function () + "Put mark at end of function, point at beginning." + (interactive) + (push-mark (point)) + (erlang-end-of-function 1) + ;; Sets the region. In Emacs 19 and XEmacs, we want to activate + ;; the region. + (condition-case nil + (push-mark (point) nil t) + (error (push-mark (point)))) + (erlang-beginning-of-function 1) + ;; The above function deactivates the mark. + (if (boundp 'deactivate-mark) + (funcall (symbol-function 'set) 'deactivate-mark nil))))) + +(defun erlang-pass-over-function () + (while (progn + (erlang-skip-blank) + (and (not (looking-at "\\.\\(\\s \\|\n\\|\\s<\\)")) + (not (eobp)))) + (forward-sexp 1)) + (if (not (eobp)) + (forward-char 1))) + +(defun erlang-name-of-function () + (save-excursion + ;; Skip over attribute leader. + (if (looking-at "-[ \t]*") + (re-search-forward "-[ \t]*" nil 'move)) + (let ((start (point))) + (forward-sexp 1) + (buffer-substring start (point))))) + + +;;; Miscellaneous + +(defun erlang-fill-paragraph (&optional justify) + "Like \\[fill-paragraph], but handle Erlang comments. +If any of the current line is a comment, fill the comment or the +paragraph of it that point is in, preserving the comment's indentation +and initial `%':s." + (interactive "P") + (let ((has-comment nil) + ;; If has-comment, the appropriate fill-prefix for the comment. + comment-fill-prefix) + ;; Figure out what kind of comment we are looking at. + (save-excursion + (beginning-of-line) + (cond + ;; Find the command prefix. + ((looking-at (concat "\\s *" comment-start-skip)) + (setq has-comment t) + (setq comment-fill-prefix (buffer-substring (match-beginning 0) + (match-end 0)))) + ;; A line with some code, followed by a comment? Remember that the + ;; % which starts the comment shouldn't be part of a string or + ;; character. + ((progn + (while (not (looking-at "%\\|$")) + (skip-chars-forward "^%\n\"\\\\") + (cond + ((eq (char-after (point)) ?\\) (forward-char 2)) + ((eq (char-after (point)) ?\") (forward-sexp 1)))) + (looking-at comment-start-skip)) + (setq has-comment t) + (setq comment-fill-prefix + (concat (make-string (current-column) ? ) + (buffer-substring (match-beginning 0) (match-end 0))))))) + (if (not has-comment) + (fill-paragraph justify) + ;; Narrow to include only the comment, and then fill the region. + (save-restriction + (narrow-to-region + ;; Find the first line we should include in the region to fill. + (save-excursion + (while (and (zerop (forward-line -1)) + (looking-at "^\\s *%"))) + ;; We may have gone to far. Go forward again. + (or (looking-at "^\\s *%") + (forward-line 1)) + (point)) + ;; Find the beginning of the first line past the region to fill. + (save-excursion + (while (progn (forward-line 1) + (looking-at "^\\s *%"))) + (point))) + ;; Lines with only % on them can be paragraph boundaries. + (let ((paragraph-start (concat paragraph-start "\\|^[ \t%]*$")) + (paragraph-separate (concat paragraph-start "\\|^[ \t%]*$")) + (fill-prefix comment-fill-prefix)) + (fill-paragraph justify)))))) + + +(defun erlang-uncomment-region (beg end) + "Uncomment all commented lines in the region." + (interactive "r") + (uncomment-region beg end)) + + +(defun erlang-generate-new-clause () + "Create additional Erlang clause header. + +Parses the source file for the name of the current Erlang function. +Create the header containing the name, A pair of parentheses, +and an arrow. The space between the function name and the +first parenthesis is preserved. The point is placed between +the parentheses." + (interactive) + (let ((name (save-excursion + (and (erlang-beginning-of-clause) + (erlang-get-function-name t)))) + (arrow (save-excursion + (and (erlang-beginning-of-clause) + (erlang-get-function-arrow))))) + (if (or (null arrow) (null name)) + (error "Can't find name of current Erlang function")) + (if (and (bolp) (eolp)) + nil + (end-of-line) + (newline)) + (insert name) + (save-excursion + (insert ") " arrow)) + (if erlang-new-clause-with-arguments + (erlang-clone-arguments)))) + + +(defun erlang-clone-arguments () + "Insert, at the point, the argument list of the previous clause. + +The mark is set at the beginning of the inserted text, the point +at the end." + (interactive) + (let ((args (save-excursion + (beginning-of-line) + (and (erlang-beginning-of-clause) + (erlang-get-function-arguments)))) + (p (point))) + (if (null args) + (error "Can't clone argument list")) + (insert args) + (set-mark p))) + +;;; Information retrieval functions. + +(defun erlang-buffer-substring (beg end) + "Like `buffer-substring-no-properties'. +Although, this function works on all versions of Emacs." + (if (fboundp 'buffer-substring-no-properties) + (funcall (symbol-function 'buffer-substring-no-properties) beg end) + (buffer-substring beg end))) + + +(defun erlang-get-module () + "Return the name of the module as specified by `-module'. + +Return nil if file contains no `-module' attribute." + (save-excursion + (save-restriction + (widen) + (goto-char (point-min)) + (let ((md (match-data))) + (unwind-protect + (if (re-search-forward + (eval-when-compile + (concat "^-module\\s *(\\s *\\(\\(" + erlang-atom-regexp + "\\)?\\)\\s *)\\s *\\.")) + (point-max) t) + (erlang-remove-quotes + (erlang-buffer-substring (match-beginning 1) + (match-end 1))) + nil) + (store-match-data md)))))) + + +(defun erlang-get-module-from-file-name (&optional file) + "Extract the module name from a file name. + +First, the directory part is removed. Second, the part of the file name +matching `erlang-file-name-extension-regexp' is removed. + +Should the match fail, nil is returned. + +By modifying `erlang-file-name-extension-regexp' to match files other +than Erlang source files, Erlang specific functions could be applied on +non-Erlang files. Most notably; the support for Erlang modules in the +tags system could be used by files written in other languages." + (or file (setq file buffer-file-name)) + (if (null file) + nil + (setq file (file-name-nondirectory file)) + (if (string-match erlang-file-name-extension-regexp file) + (substring file 0 (match-beginning 0)) + nil))) + + +;; Used by `erlang-get-export' and `erlang-get-import'. + +(defun erlang-get-function-arity-list () + "Parse list of `function/arity' as used by `-import' and `-export'. + +Point must be before the opening bracket. When the +function returns the point will be placed after the closing bracket. + +The function does not return an error if the list is incorrectly +formatted. + +Return list of (function . arity). The order of the returned list +corresponds to the order of the parsed Erlang list." + (let ((res '())) + (erlang-skip-blank) + (forward-char 1) + (if (not (eq (preceding-char) ?\[)) + '() ; Not looking at an Erlang list. + (while ; Note: `while' has no body. + (progn + (erlang-skip-blank) + (and (looking-at (eval-when-compile + (concat erlang-atom-regexp "/\\([0-9]+\\)\\>"))) + (progn + (setq res (cons + (cons + (erlang-remove-quotes + (erlang-buffer-substring + (match-beginning 1) (match-end 1))) + (erlang-string-to-int + (erlang-buffer-substring + (match-beginning + (+ 1 erlang-atom-regexp-matches)) + (match-end + (+ 1 erlang-atom-regexp-matches))))) + res)) + (goto-char (match-end 0)) + (erlang-skip-blank) + (forward-char 1) + ;; Test if there are more exported functions. + (eq (preceding-char) ?,)))))) + (nreverse res))) + + +;;; Note that `-export' and the open parenthesis must be written on +;;; the same line. + +(defun erlang-get-export () + "Return a list of `(function . arity)' as specified by `-export'." + (save-excursion + (goto-char (point-min)) + (let ((md (match-data)) + (res '())) + (unwind-protect + (progn + (while (re-search-forward "^-export\\s *(" (point-max) t) + (erlang-skip-blank) + (setq res (nconc res (erlang-get-function-arity-list)))) + res) + (store-match-data md))))) + + +(defun erlang-get-import () + "Parse an Erlang source file for imported functions. + +Return an alist with module name as car part and list of conses containing +function and arity as cdr part." + (save-excursion + (goto-char (point-min)) + (let ((md (match-data)) + (res '())) + (unwind-protect + (progn + (while (re-search-forward "^-import\\s *(" (point-max) t) + (erlang-skip-blank) + (if (looking-at erlang-atom-regexp) + (let ((module (erlang-remove-quotes + (erlang-buffer-substring + (match-beginning 0) + (match-end 0))))) + (goto-char (match-end 0)) + (erlang-skip-blank) + (if (eq (following-char) ?,) + (progn + (forward-char 1) + (erlang-skip-blank) + (let ((funcs (erlang-get-function-arity-list)) + (pair (assoc module res))) + (if pair + (setcdr pair (nconc (cdr pair) funcs)) + (setq res (cons (cons module funcs) + res))))))))) + (nreverse res)) + (store-match-data md))))) + + +(defun erlang-get-function-name (&optional arg) + "Return name of current function, or nil. + +If optional argument is non-nil, everything up to and including +the first `(' is returned. + +Normally used in conjunction with `erlang-beginning-of-clause', e.g.: + (save-excursion + (if (not (eobp)) (forward-char 1)) + (and (erlang-beginning-of-clause) + (erlang-get-function-name t)))" + (let ((n (if arg 0 1))) + (and (looking-at (eval-when-compile + (concat "^" erlang-atom-regexp "\\s *("))) + (erlang-buffer-substring (match-beginning n) (match-end n))))) + + +(defun erlang-get-function-arrow () + "Return arrow of current function, could be \"->\" or nil. + +Normally used in conjunction with `erlang-beginning-of-clause', e.g.: + (save-excursion + (if (not (eobp)) (forward-char 1)) + (and (erlang-beginning-of-clause) + (erlang-get-function-arrow)))" + (and + (save-excursion + (re-search-forward "[^-:]*-\\|:" (point-max) t) + (erlang-buffer-substring (- (point) 1) (+ (point) 1))))) + +(defun erlang-get-function-arity () + "Return the number of arguments of function at point, or nil." + (and (looking-at (eval-when-compile + (concat "^" erlang-atom-regexp "\\s *("))) + (save-excursion + (goto-char (match-end 0)) + (condition-case nil + (let ((res 0) + (cont t)) + (while cont + (cond ((eobp) + (setq res nil) + (setq cont nil)) + ((looking-at "\\s *)") + (setq cont nil)) + ((looking-at "\\s *\\($\\|%\\)") + (forward-line 1)) + ((looking-at "\\s *,") + (setq res (+ 1 res)) + (goto-char (match-end 0))) + (t + (when (zerop res) + (setq res (+ 1 res))) + (forward-sexp 1)))) + res) + (error nil))))) + +(defun erlang-get-function-arguments () + "Return arguments of current function, or nil." + (if (not (looking-at (eval-when-compile + (concat "^" erlang-atom-regexp "\\s *(")))) + nil + (save-excursion + (condition-case nil + (let ((start (match-end 0))) + (goto-char (- start 1)) + (forward-sexp) + (erlang-buffer-substring start (- (point) 1))) + (error nil))))) + + +(defun erlang-get-function-under-point () + "Return the module and function under the point, or nil. + +Should no explicit module name be present at the point, the +list of imported functions is searched. + +The following could be returned: + (\"module\" \"function\") -- Both module and function name found. + (nil \"function\") -- No module name was found. + nil -- No function name found + +In the future the list may contain more elements." + (save-excursion + (let ((md (match-data)) + (res nil)) + (if (eq (char-syntax (following-char)) ? ) + (skip-chars-backward " \t")) + (skip-chars-backward "a-zA-Z0-9_:'") + (cond ((looking-at (eval-when-compile + (concat erlang-atom-regexp ":" erlang-atom-regexp))) + (setq res (list + (erlang-remove-quotes + (erlang-buffer-substring + (match-beginning 1) (match-end 1))) + (erlang-remove-quotes + (erlang-buffer-substring + (match-beginning (1+ erlang-atom-regexp-matches)) + (match-end (1+ erlang-atom-regexp-matches))))))) + ((looking-at erlang-atom-regexp) + (let ((fk (erlang-remove-quotes + (erlang-buffer-substring + (match-beginning 0) (match-end 0)))) + (mod nil) + (imports (erlang-get-import))) + (while (and imports (null mod)) + (if (assoc fk (cdr (car imports))) + (setq mod (car (car imports))) + (setq imports (cdr imports)))) + (setq res (list mod fk))))) + (store-match-data md) + res))) + + +;; TODO: Escape single quotes inside the string without +;; replace-regexp-in-string. +(defun erlang-add-quotes-if-needed (str) + "Return STR, possibly with quotes." + (let ((case-fold-search nil)) ; force string matching to be case sensitive + (if (and (stringp str) + (not (string-match (eval-when-compile + (concat "\\`" erlang-atom-regexp "\\'")) str))) + (progn (if (fboundp 'replace-regexp-in-string) + (setq str (replace-regexp-in-string "'" "\\'" str t t ))) + (concat "'" str "'")) + str))) + + +(defun erlang-remove-quotes (str) + "Return STR without quotes, if present." + (let ((md (match-data))) + (prog1 + (if (string-match "\\`'\\(.*\\)'\\'" str) + (substring str 1 -1) + str) + (store-match-data md)))) + + +;;; Check module name + +;; The function `write-file', bound to C-x C-w, calls +;; `set-visited-file-name' which clears the hook. :-( +;; To make sure that the hook always is present, we advise +;; `set-visited-file-name'. +(defun erlang-check-module-name-init () + "Initialize the functionality to compare file and module names. + +Unless we have `before-save-hook', we redefine the function +`set-visited-file-name' since it clears the variable +`local-write-file-hooks'. The original function definition is +stored in `erlang-orig-set-visited-file-name'." + (if (boundp 'before-save-hook) + ;; If we have that, `make-local-hook' is obsolete. + (add-hook 'before-save-hook 'erlang-check-module-name nil t) + (require 'advice) + (unless (ad-advised-definition-p 'set-visited-file-name) + (defadvice set-visited-file-name (after erlang-set-visited-file-name + activate) + (if (eq major-mode 'erlang-mode) + (add-hook 'local-write-file-hooks 'erlang-check-module-name)))) + (add-hook 'local-write-file-hooks 'erlang-check-module-name))) + + +(defun erlang-check-module-name () + "If the module name doesn't match file name, ask for permission to change. + +The variable `erlang-check-module-name' controls the behaviour of this +function. It it is nil, this function does nothing. If it is t, the +source is silently changed. If it is set to the atom `ask', the user +is prompted. + +This function is normally placed in the hook `local-write-file-hooks'." + (if erlang-check-module-name + (let ((mn (erlang-add-quotes-if-needed + (erlang-get-module))) + (fn (erlang-add-quotes-if-needed + (erlang-get-module-from-file-name (buffer-file-name))))) + (if (and (stringp mn) (stringp fn)) + (or (string-equal mn fn) + (if (or (eq erlang-check-module-name t) + (y-or-n-p + "Module does not match file name. Modify source? ")) + (save-excursion + (save-restriction + (widen) + (goto-char (point-min)) + (if (re-search-forward + (eval-when-compile + (concat "^-module\\s *(\\s *\\(\\(" + erlang-atom-regexp + "\\)?\\)\\s *)\\s *\\.")) + (point-max) t) + (progn + (goto-char (match-beginning 1)) + (delete-region (match-beginning 1) + (match-end 1)) + (insert fn)))))))))) + ;; Must return nil since it is added to `local-write-file-hook'. + nil) + + +;;; Electric functions. + +(defun erlang-electric-semicolon (&optional arg) + "Insert a semicolon character and possibly a prototype for the next line. + +The variable `erlang-electric-semicolon-criteria' states a criterion, +when fulfilled a newline is inserted, the next line is indented and a +prototype for the next line is inserted. Normally the prototype +consists of \" ->\". Should the semicolon end the clause a new clause +header is generated. + +The variable `erlang-electric-semicolon-insert-blank-lines' controls +the number of blank lines inserted between the current line and new +function header. + +Behaves just like the normal semicolon when supplied with a +numerical arg, point is inside string or comment, or when there are +non-whitespace characters following the point on the current line." + (interactive "P") + (self-insert-command (prefix-numeric-value arg)) + (if (or arg + (and (listp erlang-electric-commands) + (not (memq 'erlang-electric-semicolon + erlang-electric-commands))) + (erlang-in-literal) + (not (looking-at "\\s *\\(%.*\\)?$")) + (null (erlang-test-criteria-list + erlang-electric-semicolon-criteria))) + (setq erlang-electric-newline-inhibit nil) + (setq erlang-electric-newline-inhibit t) + (undo-boundary) + (end-of-line) + (newline) + (if (condition-case nil + (progn (erlang-indent-line) t) + (error (if (bolp) (delete-backward-char 1)))) + (if (not (bolp)) + (save-excursion + (insert " ->")) + (condition-case nil + (progn + (erlang-generate-new-clause) + (if erlang-electric-semicolon-insert-blank-lines + (save-excursion + (beginning-of-line) + (newline + erlang-electric-semicolon-insert-blank-lines)))) + (error (if (bolp) (delete-backward-char 1)))))))) + + +(defun erlang-electric-comma (&optional arg) + "Insert a comma character and possibly a new indented line. +The variable `erlang-electric-comma-criteria' states a criterion, +when fulfilled a newline is inserted and the next line is indented. + +Behaves just like the normal comma when supplied with a +numerical arg, point is inside string or comment, or when there are +non-whitespace characters following the point on the current line." + (interactive "P") + + (self-insert-command (prefix-numeric-value arg)) + + (if (or arg + (and (listp erlang-electric-commands) + (not (memq 'erlang-electric-comma erlang-electric-commands))) + (erlang-in-literal) + (not (looking-at "\\s *\\(%.*\\)?$")) + (null (erlang-test-criteria-list + erlang-electric-comma-criteria))) + (setq erlang-electric-newline-inhibit nil) + (setq erlang-electric-newline-inhibit t) + (undo-boundary) + (end-of-line) + (newline) + (condition-case nil + (erlang-indent-line) + (error (if (bolp) (delete-backward-char 1)))))) + +(defun erlang-electric-lt (&optional arg) + "Insert a less-than sign, and optionally mark it as an open paren." + + (interactive "p") + + (self-insert-command arg) + + ;; Was this the second char in bit-syntax open (`<<')? + (unless (< (point) 2) + (save-excursion + (backward-char 2) + (when (and (eq (char-after (point)) ?<) + (not (eq (get-text-property (point) 'category) + 'bitsyntax-open-inner))) + ;; Then mark the two chars... + (put-text-property (point) (1+ (point)) + 'category 'bitsyntax-open-outer) + (forward-char 1) + (put-text-property (point) (1+ (point)) + 'category 'bitsyntax-open-inner) + ;;...and unmark any subsequent less-than chars. + (forward-char 1) + (while (eq (char-after (point)) ?<) + (remove-text-properties (point) (1+ (point)) + '(category nil)) + (forward-char 1)))))) + +(defun erlang-after-bitsyntax-close () + "Return t if point is immediately after a bit-syntax close parenthesis (`>>')." + (and (>= (point) 2) + (save-excursion + (backward-char 2) + (and (eq (char-after (point)) ?>) + (not (eq (get-text-property (point) 'category) + 'bitsyntax-close-outer)))))) + +(defun erlang-after-arrow () + "Return true if point is immediately after a function arrow (`->')." + (and (>= (point) 2) + (and + (save-excursion + (backward-char) + (eq (char-before (point)) ?-)) + (or (not (listp erlang-electric-commands)) + (memq 'erlang-electric-gt + erlang-electric-commands)) + (not (erlang-in-literal)) + (looking-at "\\s *\\(%.*\\)?$") + (erlang-test-criteria-list erlang-electric-arrow-criteria)))) + + +(defun erlang-electric-gt (&optional arg) + "Insert a greater-than sign, and optionally mark it as a close paren." + + (interactive "p") + + (self-insert-command arg) + + (cond + ;; Did we just write a bit-syntax close (`>>')? + ((erlang-after-bitsyntax-close) + (save-excursion + ;; Then mark the two chars... + (backward-char 2) + (put-text-property (point) (1+ (point)) + 'category 'bitsyntax-close-inner) + (forward-char) + (put-text-property (point) (1+ (point)) + 'category 'bitsyntax-close-outer) + ;;...and unmark any subsequent greater-than chars. + (forward-char) + (while (eq (char-after (point)) ?>) + (remove-text-properties (point) (1+ (point)) + '(category nil)) + (forward-char)))) + + ;; Did we just write a function arrow (`->')? + ((erlang-after-arrow) + (let ((erlang-electric-newline-inhibit t)) + (undo-boundary) + (end-of-line) + (newline) + (condition-case nil + (erlang-indent-line) + (error (if (bolp) (delete-backward-char 1)))))) + + ;; Then it's just a plain greater-than. + (t + nil))) + + +(defun erlang-electric-arrow\ off (&optional arg) + "Insert a '>'-sign and possibly a new indented line. + +This command is only `electric' when the `>' is part of an `->' arrow. +The variable `erlang-electric-arrow-criteria' states a sequence of +criteria, which decides when a newline should be inserted and the next +line indented. + +It behaves just like the normal greater than sign when supplied with a +numerical arg, point is inside string or comment, or when there are +non-whitespace characters following the point on the current line. + +After being split/merged into `erlang-after-arrow' and +`erlang-electric-gt', it is now unused and disabled." + (interactive "P") + (let ((prec (preceding-char))) + (self-insert-command (prefix-numeric-value arg)) + (if (or arg + (and (listp erlang-electric-commands) + (not (memq 'erlang-electric-arrow + erlang-electric-commands))) + (not (eq prec ?-)) + (erlang-in-literal) + (not (looking-at "\\s *\\(%.*\\)?$")) + (null (erlang-test-criteria-list + erlang-electric-arrow-criteria))) + (setq erlang-electric-newline-inhibit nil) + (setq erlang-electric-newline-inhibit t) + (undo-boundary) + (end-of-line) + (newline) + (condition-case nil + (erlang-indent-line) + (error (if (bolp) (delete-backward-char 1))))))) + + +(defun erlang-electric-newline (&optional arg) + "Break line at point and indent, continuing comment if within one. +The variable `erlang-electric-newline-criteria' states a criterion, +when fulfilled a newline is inserted and the next line is indented. + +Should the current line begin with a comment, and the variable +`comment-multi-line' be non-nil, a new comment start is inserted. + +Should the previous command be another electric command we assume that +the user pressed newline out of old habit, hence we will do nothing." + (interactive "P") + (cond ((and (not arg) + erlang-electric-newline-inhibit + (memq last-command erlang-electric-newline-inhibit-list)) + ()) ; Do nothing! + ((or arg + (and (listp erlang-electric-commands) + (not (memq 'erlang-electric-newline + erlang-electric-commands))) + (null (erlang-test-criteria-list + erlang-electric-newline-criteria))) + (newline (prefix-numeric-value arg))) + (t + (if (and comment-multi-line + (save-excursion + (beginning-of-line) + (looking-at (concat "\\s *" comment-start-skip)))) + (let ((str (buffer-substring + (or (match-end 1) (match-beginning 0)) + (min (match-end 0) (point))))) + (newline) + (undo-boundary) + (insert str)) + (newline) + (undo-boundary) + (indent-according-to-mode))))) + + +(defun erlang-test-criteria-list (criteria) + "Given a list of criterion functions, test if criteria are fulfilled. + +Each element in the criteria list can a function returning nil, t or +the atom `stop'. t means that the criterion is fulfilled, `stop' means +that it isn't fulfilled and that the search should stop, +and nil means continue searching. + +Should the list contain the atom t the criterion is assumed to be +fulfilled, unless preceded by a function returning `stop', of course. + +Should the argument be the atom t instead of a list, the criterion is +assumed to be trivially true. + +Should all functions return nil, the criteria are assumed not to be +fulfilled. + +Return t if criteria fulfilled, nil otherwise." + (if (eq criteria t) + t + (save-excursion + (let ((answer nil)) + (while (and criteria (null answer)) + (if (eq (car criteria) t) + (setq answer t) + (setq answer (funcall (car criteria)))) + (setq criteria (cdr criteria))) + (if (and answer (not (eq answer 'stop))) + t + nil))))) + + +(defun erlang-in-literal (&optional lim) + "Test if point is in string, quoted atom or comment. + +Return one of the three atoms `atom', `string', and `comment'. +Should the point be inside none of the above mentioned types of +context, nil is returned." + (save-excursion + (let* ((lim (or lim (save-excursion + (erlang-beginning-of-clause) + (point)))) + (state (if (fboundp 'syntax-ppss) ; post Emacs 21.3 + (funcall (symbol-function 'syntax-ppss)) + (parse-partial-sexp lim (point))))) + (cond + ((eq (nth 3 state) ?') 'atom) + ((nth 3 state) 'string) + ((nth 4 state) 'comment) + (t nil))))) + + +(defun erlang-at-end-of-function-p () + "Test if point is at end of an Erlang function. + +This function is designed to be a member of a criteria list." + (eq (save-excursion (erlang-skip-blank) (point)) + (save-excursion + (erlang-beginning-of-function -1) (point)))) + + +(defun erlang-at-end-of-clause-p () + "Test if point is at end of an Erlang clause. + +This function is designed to be a member of a criteria list." + (eq (save-excursion (erlang-skip-blank) (point)) + (save-excursion + (erlang-beginning-of-clause -1) (point)))) + + +(defun erlang-stop-when-inside-argument-list () + "Return `stop' if inside parenthesis list, nil otherwise. + +Knows about the list comprehension syntax. When the point is +after `||', `stop' is not returned. + +This function is designed to be a member of a criteria list." + (save-excursion + (condition-case nil + (let ((orig-point (point)) + (state nil)) + (up-list -1) + (if (not (eq (following-char) ?\[)) + 'stop + ;; Do not return `stop' when inside a list comprehension + ;; construction. (The point must be after `||'). + (while (< (point) orig-point) + (setq state (erlang-partial-parse (point) orig-point state))) + (if (and (car state) (eq (car (car (car state))) '||)) + nil + 'stop))) + (error + nil)))) + + +(defun erlang-stop-when-at-guard () + "Return `stop' when at function guards. + +This function is designed to be a member of a criteria list." + (save-excursion + (beginning-of-line) + (if (and (looking-at (eval-when-compile + (concat "^" erlang-atom-regexp "\\s *("))) + (not (looking-at + (eval-when-compile + (concat "^" erlang-atom-regexp ".*->"))))) + 'stop + nil))) + + +(defun erlang-next-lines-empty-p () + "Return non-nil if next lines are empty. + +The variable `erlang-next-lines-empty-threshold' contains the number +of lines required to be empty. + +A line containing only spaces and tabs is considered empty. + +This function is designed to be a member of a criteria list." + (and erlang-next-lines-empty-threshold + (save-excursion + (let ((left erlang-next-lines-empty-threshold) + (cont t)) + (while (and cont (> left 0)) + (forward-line 1) + (setq cont (looking-at "\\s *$")) + (setq left (- left 1))) + cont)))) + + +(defun erlang-at-keyword-end-p () + "Test if next readable token is the keyword end. + +This function is designed to be a member of a criteria list." + (save-excursion + (erlang-skip-blank) + (looking-at "end[^_a-zA-Z0-9]"))) + + +;; Erlang tags support which is aware of erlang modules. +;; +;; Not yet implemented under XEmacs. (Hint: The Emacs 19 etags +;; package works under XEmacs.) + +(eval-when-compile + (if (or (featurep 'bytecomp) + (featurep 'byte-compile)) + (progn + (require 'etags)))) + + +;; Variables: + +(defvar erlang-tags-function-alist + '((find-tag . erlang-find-tag) + (find-tag-other-window . erlang-find-tag-other-window) + (find-tag-regexp . erlang-find-tag-regexp) + (find-tag-other-frame . erlang-find-tag-other-frame)) + "Alist of old tags commands and the replacement functions.") + +(defvar erlang-tags-installed nil + "Non-nil when the Erlang tags system is installed.") +(defvar erlang-tags-file-list '() + "List of files in tag list. Used when finding tag on form `module:'.") +(defvar erlang-tags-completion-table nil + "Like `tags-completion-table', this table contains `tag' and `module:tag'.") +(defvar erlang-tags-buffer-installed-p nil + "Non-nil when Erlang module recognising functions installed.") +(defvar erlang-tags-buffer-list '() + "Temporary list of buffers.") +(defvar erlang-tags-orig-completion-table nil + "Temporary storage for `tags-completion-table'.") +(defvar erlang-tags-orig-tag-order nil + "Temporary storage for `find-tag-tag-order'.") +(defvar erlang-tags-orig-regexp-tag-order nil + "Temporary storage for `find-tag-regexp-tag-order'.") +(defvar erlang-tags-orig-search-function nil + "Temporary storage for `find-tag-search-function'.") +(defvar erlang-tags-orig-regexp-search-function nil + "Temporary storage for `find-tag-regexp-search-function'.") +(defvar erlang-tags-orig-format-hooks nil + "Temporary storage for `tags-table-format-hooks'.") ;v19 +(defvar erlang-tags-orig-format-functions nil + "Temporary storage for `tags-table-format-functions'.") ;v > 19 + +(defun erlang-tags-init () + "Install an alternate version of tags, aware of Erlang modules. + +After calling this function, the tags functions are aware of +Erlang modules. Tags can be entered on the for `module:tag' as well +as on the old form `tag'. + +In the completion list, `module:tag' and `module:' shows up. + +Call this function from an appropriate init file, or add it to +Erlang mode hook with the commands: + (add-hook 'erlang-mode-hook 'erlang-tags-init) + (add-hook 'erlang-shell-mode-hook 'erlang-tags-init) + +This function only works under Emacs 18 and Emacs 19. Currently, It +is not implemented under XEmacs. (Hint: The Emacs 19 etags module +works under XEmacs.)" + (interactive) + (cond ((= erlang-emacs-major-version 18) + (require 'tags) + (erlang-tags-define-keys (current-local-map)) + (setq erlang-tags-installed t)) + (t + (require 'etags) + ;; Test on a function available in the Emacs 19 version + ;; of tags but not in the XEmacs version. + (if (not (fboundp 'find-tag-noselect)) + () + (erlang-tags-define-keys (current-local-map)) + (setq erlang-tags-installed t))))) + + +;; Set all keys bound to `find-tag' et.al. in the global map and the +;; menu to `erlang-find-tag' et.al. in `map'. +;; +;; The function `substitute-key-definition' does not work properly +;; in all version of Emacs. + +(defun erlang-tags-define-keys (map) + "Bind tags commands to keymap MAP aware of Erlang modules." + (let ((alist erlang-tags-function-alist)) + (while alist + (let* ((old (car (car alist))) + (new (cdr (car alist))) + (keys (append (where-is-internal old global-map)))) + (while keys + (define-key map (car keys) new) + (setq keys (cdr keys)))) + (setq alist (cdr alist)))) + ;; Update the menu. + (erlang-menu-substitute erlang-menu-base-items erlang-tags-function-alist) + (erlang-menu-init)) + + +;; There exists a variable `find-tag-default-function'. It is not used +;; since `complete-tag' uses it to get current word under point. In that +;; situation we don't want the module to be prepended. + +(defun erlang-find-tag-default () + "Return the default tag. +Search `-import' list of imported functions. +Single quotes are been stripped away." + (let ((mod-func (erlang-get-function-under-point))) + (cond ((null mod-func) + nil) + ((null (car mod-func)) + (nth 1 mod-func)) + (t + (concat (car mod-func) ":" (nth 1 mod-func)))))) + + +;; Return `t' since it is used inside `tags-loop-form'. +;;;###autoload +(defun erlang-find-tag (modtagname &optional next-p regexp-p) + "Like `find-tag'. Capable of retrieving Erlang modules. + +Tags can be given on the forms `tag', `module:', `module:tag'." + (interactive (erlang-tag-interactive "Find `module:tag' or `tag': ")) + (switch-to-buffer (erlang-find-tag-noselect modtagname next-p regexp-p)) + t) + + +;; Code mainly from `find-tag-other-window' in `etags.el'. +;;;###autoload +(defun erlang-find-tag-other-window (tagname &optional next-p regexp-p) + "Like `find-tag-other-window' but aware of Erlang modules." + (interactive (erlang-tag-interactive + "Find `module:tag' or `tag' other window: ")) + + ;; This is to deal with the case where the tag is found in the + ;; selected window's buffer; without this, point is moved in both + ;; windows. To prevent this, we save the selected window's point + ;; before doing find-tag-noselect, and restore it afterwards. + (let* ((window-point (window-point (selected-window))) + (tagbuf (erlang-find-tag-noselect tagname next-p regexp-p)) + (tagpoint (progn (set-buffer tagbuf) (point)))) + (set-window-point (prog1 + (selected-window) + (switch-to-buffer-other-window tagbuf) + ;; We have to set this new window's point; it + ;; might already have been displaying a + ;; different portion of tagbuf, in which case + ;; switch-to-buffer-other-window doesn't set + ;; the window's point from the buffer. + (set-window-point (selected-window) tagpoint)) + window-point))) + + +(defun erlang-find-tag-other-frame (tagname &optional next-p) + "Like `find-tag-other-frame' but aware of Erlang modules." + (interactive (erlang-tag-interactive + "Find `module:tag' or `tag' other frame: ")) + (let ((pop-up-frames t)) + (erlang-find-tag-other-window tagname next-p))) + + +(defun erlang-find-tag-regexp (regexp &optional next-p other-window) + "Like `find-tag-regexp' but aware of Erlang modules." + (interactive (if (fboundp 'find-tag-regexp) + (erlang-tag-interactive + "Find `module:regexp' or `regexp': ") + (error "This version of Emacs can't find tags by regexps"))) + (funcall (if other-window + 'erlang-find-tag-other-window + 'erlang-find-tag) + regexp next-p t)) + + +;; Just like C-u M-. This could be added to the menu. +(defun erlang-find-next-tag () + "Find next tag, like \\[find-tag] with prefix arg." + (interactive) + (let ((current-prefix-arg '(4))) + (if erlang-tags-installed + (call-interactively 'erlang-find-tag) + (call-interactively 'find-tag)))) + + +;; Mimics `find-tag-noselect' found in `etags.el', but uses `find-tag' to +;; be compatible with `tags.el'. +;; +;; Handles three cases: +;; * `module:' Loop over all possible file names. Stop if a file-name +;; without extension and directory matches the module. +;; +;; * `module:tag' +;; Emacs 19: Replace test functions with functions aware of +;; Erlang modules. Tricky because the etags system wasn't +;; built for these kind of operations... +;; +;; Emacs 18: We loop over `find-tag' until we find a file +;; whose module matches the requested module. The +;; drawback is that a lot of files could be loaded into +;; Emacs. +;; +;; * `tag' Just give it to `find-tag'. + +(defun erlang-find-tag-noselect (modtagname &optional next-p regexp-p) + "Like `find-tag-noselect' but aware of Erlang modules." + (interactive (erlang-tag-interactive "Find `module:tag' or `tag': ")) + (or modtagname + (setq modtagname (symbol-value 'last-tag))) + (funcall (symbol-function 'set) 'last-tag modtagname) + ;; `tags.el' uses this variable to record how M-, would + ;; know where to restart a tags command. + (if (boundp 'tags-loop-form) + (funcall (symbol-function 'set) + 'tags-loop-form '(erlang-find-tag nil t))) + (save-window-excursion + (cond + ((string-match ":$" modtagname) + ;; Only the module name was given. Read all files whose file name + ;; match. + (let ((modname (substring modtagname 0 (match-beginning 0))) + (file nil)) + (if (not next-p) + (save-excursion + (visit-tags-table-buffer) + (setq erlang-tags-file-list + (funcall (symbol-function 'tags-table-files))))) + (while (null file) + (or erlang-tags-file-list + (save-excursion + (if (and (featurep 'etags) + (funcall + (symbol-function 'visit-tags-table-buffer) 'same) + (funcall + (symbol-function 'visit-tags-table-buffer) t)) + (setq erlang-tags-file-list + (funcall (symbol-function 'tags-table-files))) + (error "No %stags containing %s" (if next-p "more " "") + modtagname)))) + (if erlang-tags-file-list + (let ((this-module (erlang-get-module-from-file-name + (car erlang-tags-file-list)))) + (if (and (stringp this-module) + (string= modname this-module)) + (setq file (car erlang-tags-file-list))) + (setq erlang-tags-file-list (cdr erlang-tags-file-list))))) + (set-buffer (or (get-file-buffer file) + (find-file-noselect file))))) + + ((string-match ":" modtagname) + (if (boundp 'find-tag-tag-order) + ;; Method one: Add module-recognising functions to the + ;; list of order functions. However, the tags system + ;; from Emacs 18, and derives thereof (read: XEmacs) + ;; hasn't got this feature. + (progn + (erlang-tags-install-module-check) + (unwind-protect + (funcall (symbol-function 'find-tag) + modtagname next-p regexp-p) + (erlang-tags-remove-module-check))) + ;; Method two: Call the tags system until a file matching + ;; the module is found. This could result in that many + ;; files are read. (e.g. The tag "foo:file" will take a + ;; while to process.) + (let* ((modname (substring modtagname 0 (match-beginning 0))) + (tagname (substring modtagname (match-end 0) nil)) + (last-tag tagname) + file) + (while + (progn + (funcall (symbol-function 'find-tag) tagname next-p regexp-p) + (setq next-p t) + ;; Determine the module form the file name. (The + ;; alternative, to check `-module', would make this + ;; code useless for non-Erlang programs.) + (setq file (erlang-get-module-from-file-name buffer-file-name)) + (not (and (stringp file) + (string= modname file)))))))) + (t + (funcall (symbol-function 'find-tag) modtagname next-p regexp-p))) + (current-buffer))) ; Return the new buffer. + + +;; Process interactive arguments for erlang-find-tag-*. +;; +;; Negative arguments work only for `etags', not `tags'. This is not +;; a problem since negative arguments means step back into the +;; history list, a feature not implemented in `tags'. + +(defun erlang-tag-interactive (prompt) + (condition-case nil + (require 'etags) + (error + (require 'tags))) + (if current-prefix-arg + (list nil (if (< (prefix-numeric-value current-prefix-arg) 0) + '- + t)) + (let* ((default (erlang-find-tag-default)) + (prompt (if default + (format "%s(default %s) " prompt default) + prompt)) + (spec (if (featurep 'etags) + (completing-read prompt 'erlang-tags-complete-tag) + (read-string prompt)))) + (list (if (equal spec "") + (or default (error "There is no default tag")) + spec))))) + + +;; Search tag functions which are aware of Erlang modules. The tactic +;; is to store new search functions into the local variables of the +;; TAGS buffers. The variables are restored directly after the +;; search. The situation is complicated by the fact that new TAGS +;; files can be loaded during the search. +;; + +(defun erlang-tags-install-module-check () + "Install our own tag search functions." + ;; Make sure our functions are installed in TAGS files loaded + ;; into Emacs while searching. + (cond + ((>= erlang-emacs-major-version 20) + (setq erlang-tags-orig-format-functions + (symbol-value 'tags-table-format-functions)) + (funcall (symbol-function 'set) 'tags-table-format-functions + (cons 'erlang-tags-recognize-tags-table + erlang-tags-orig-format-functions)) + (setq erlang-tags-buffer-list '()) + ) + (t + (setq erlang-tags-orig-format-hooks + (symbol-value 'tags-table-format-hooks)) + (funcall (symbol-function 'set) 'tags-table-format-hooks + (cons 'erlang-tags-recognize-tags-table + erlang-tags-orig-format-hooks)) + (setq erlang-tags-buffer-list '()) + )) + + ;; Install our functions in the TAGS files already resident. + (save-excursion + (let ((files (symbol-value 'tags-table-computed-list))) + (while files + (if (stringp (car files)) + (if (get-file-buffer (car files)) + (progn + (set-buffer (get-file-buffer (car files))) + (erlang-tags-install-local)))) + (setq files (cdr files)))))) + + +(defun erlang-tags-install-local () + "Install our tag search functions in current buffer." + (if erlang-tags-buffer-installed-p + () + ;; Mark this buffer as "installed" and record. + (set (make-local-variable 'erlang-tags-buffer-installed-p) t) + (setq erlang-tags-buffer-list + (cons (current-buffer) erlang-tags-buffer-list)) + + ;; Save the original values. + (set (make-local-variable 'erlang-tags-orig-tag-order) + (symbol-value 'find-tag-tag-order)) + (set (make-local-variable 'erlang-tags-orig-regexp-tag-order) + (symbol-value 'find-tag-regexp-tag-order)) + (set (make-local-variable 'erlang-tags-orig-search-function) + (symbol-value 'find-tag-search-function)) + (set (make-local-variable 'erlang-tags-orig-regexp-search-function) + (symbol-value 'find-tag-regexp-search-function)) + + ;; Install our own functions. + (set (make-local-variable 'find-tag-search-function) + 'erlang-tags-search-forward) + (set (make-local-variable 'find-tag-regexp-search-function) + 'erlang-tags-regexp-search-forward) + (set (make-local-variable 'find-tag-tag-order) + '(erlang-tag-match-module-p)) + (set (make-local-variable 'find-tag-regexp-tag-order) + '(erlang-tag-match-module-regexp-p)))) + + +(defun erlang-tags-remove-module-check () + "Remove our own tags search functions." + (cond + ((>= erlang-emacs-major-version 20) + (funcall (symbol-function 'set) + 'tags-table-format-functions + erlang-tags-orig-format-functions) + ) + (t + (funcall (symbol-function 'set) + 'tags-table-format-hooks + erlang-tags-orig-format-hooks) + )) + + ;; Remove our functions from the TAGS files. (Note that + ;; `tags-table-computed-list' need not be the same list as when + ;; the search was started.) + (save-excursion + (let ((buffers erlang-tags-buffer-list)) + (while buffers + (if (buffer-name (car buffers)) + (progn + (set-buffer (car buffers)) + (erlang-tags-remove-local))) + (setq buffers (cdr buffers)))))) + + +(defun erlang-tags-remove-local () + "Remove our tag search functions from current buffer." + (if (null erlang-tags-buffer-installed-p) + () + (funcall (symbol-function 'set) 'erlang-tags-buffer-installed-p nil) + (funcall (symbol-function 'set) + 'find-tag-tag-order erlang-tags-orig-tag-order) + (funcall (symbol-function 'set) + 'find-tag-regexp-tag-order erlang-tags-orig-regexp-tag-order) + (funcall (symbol-function 'set) + 'find-tag-search-function erlang-tags-orig-search-function) + (funcall (symbol-function 'set) + 'find-tag-regexp-search-function + erlang-tags-orig-regexp-search-function))) + + +(defun erlang-tags-recognize-tags-table () + "Install our functions in all loaded TAGS files. + +This function is added to `tags-table-format-hooks/functions' when searching +for a tag on the form `module:tag'." + (if (null (funcall (symbol-function 'etags-recognize-tags-table))) + nil + (erlang-tags-install-local) + t)) + + +(defun erlang-tags-search-forward (tag &optional bound noerror count) + "Forward search function, aware of Erlang module prefix." + (if (string-match ":" tag) + (setq tag (substring tag (match-end 0) nil))) + ;; Avoid unintended recursion. + (if (eq erlang-tags-orig-search-function 'erlang-tags-search-forward) + (search-forward tag bound noerror count) + (funcall erlang-tags-orig-search-function tag bound noerror count))) + + +(defun erlang-tags-regexp-search-forward (tag &optional bound noerror count) + "Forward regexp search function, aware of Erlang module prefix." + (if (string-match ":" tag) + (setq tag (substring tag (match-end 0) nil))) + (if (eq erlang-tags-orig-regexp-search-function + 'erlang-tags-regexp-search-forward) + (re-search-forward tag bound noerror count) + (funcall erlang-tags-orig-regexp-search-function + tag bound noerror count))) + + +;; t if point is at a tag line that matches TAG, containing +;; module information. Assumes that all other order functions +;; are stored in `erlang-tags-orig-[regex]-tag-order'. + +(defun erlang-tag-match-module-p (tag) + (erlang-tag-match-module-common-p tag erlang-tags-orig-tag-order)) + +(defun erlang-tag-match-module-regexp-p (tag) + (erlang-tag-match-module-common-p tag erlang-tags-orig-regexp-tag-order)) + +(defun erlang-tag-match-module-common-p (tag order) + (let ((mod nil) + (found nil)) + (if (string-match ":" tag) + (progn + (setq mod (substring tag 0 (match-beginning 0))) + (setq tag (substring tag (match-end 0) nil)))) + (while (and order (not found)) + (setq found + (and (not (memq (car order) + '(erlang-tag-match-module-p + erlang-tag-match-module-regexp-p))) + (funcall (car order) tag))) + (setq order (cdr order))) + (and found + (or (null mod) + (string= mod (erlang-get-module-from-file-name + (file-of-tag))))))) + + +;;; Tags completion, Emacs 19 `etags' specific. +;;; +;;; The basic idea is to create a second completion table `erlang-tags- +;;; completion-table' containing all normal tags plus tags on the form +;;; `module:tag'. + + +(defun erlang-complete-tag () + "Perform tags completion on the text around point. +Completes to the set of names listed in the current tags table. + +Should the Erlang tags system be installed this command knows +about Erlang modules." + (interactive) + (condition-case nil + (require 'etags) + (error nil)) + (cond ((and erlang-tags-installed + (fboundp 'complete-tag)) ; Emacs 19 + (let ((orig-tags-complete-tag (symbol-function 'tags-complete-tag))) + (fset 'tags-complete-tag + (symbol-function 'erlang-tags-complete-tag)) + (unwind-protect + (funcall (symbol-function 'complete-tag)) + (fset 'tags-complete-tag orig-tags-complete-tag)))) + ((fboundp 'complete-tag) ; Emacs 19 + (funcall (symbol-function 'complete-tag))) + ((fboundp 'tag-complete-symbol) ; XEmacs + (funcall (symbol-function 'tag-complete-symbol))) + (t + (error "This version of Emacs can't complete tags")))) + + +;; Based on `tags-complete-tag', but this one uses +;; `erlang-tags-completion-table' instead of `tags-completion-table'. +;; +;; This is the entry-point called by system function `completing-read'. +(defun erlang-tags-complete-tag (string predicate what) + (save-excursion + ;; If we need to ask for the tag table, allow that. + (let ((enable-recursive-minibuffers t)) + (visit-tags-table-buffer)) + (if (eq what t) + (all-completions string (erlang-tags-completion-table) predicate) + (try-completion string (erlang-tags-completion-table) predicate)))) + + +;; `tags-completion-table' calls itself recursively, make it +;; call our own wedge instead. Note that the recursive call +;; is very rare; it only occurs when a tags-file contains +;; `include'-statements. +(defun erlang-tags-completion-table () + "Build completion table. Tags on the form `tag' or `module:tag'." + (setq erlang-tags-orig-completion-table + (symbol-function 'tags-completion-table)) + (fset 'tags-completion-table + (symbol-function 'erlang-tags-completion-table-1)) + (unwind-protect + (erlang-tags-completion-table-1) + (fset 'tags-completion-table + erlang-tags-orig-completion-table))) + + +(defun erlang-tags-completion-table-1 () + (make-local-variable 'erlang-tags-completion-table) + (or erlang-tags-completion-table + (let ((tags-completion-table nil) + (tags-completion-table-function + 'erlang-etags-tags-completion-table)) + (funcall erlang-tags-orig-completion-table) + (setq erlang-tags-completion-table tags-completion-table)))) + + +;; Based on `etags-tags-completion-table'. The difference is that we +;; add three symbols to the vector, the tag, module: and module:tag. +;; The module is extracted from the file name of a tag. (This one +;; only works if we are looking at an `etags' file. However, this is +;; the only format supported by Emacs, so far.) +(defun erlang-etags-tags-completion-table () + (let ((table (make-vector 511 0)) + (file nil)) + (save-excursion + (goto-char (point-min)) + ;; This monster regexp matches an etags tag line. + ;; \1 is the string to match; + ;; \2 is not interesting; + ;; \3 is the guessed tag name; XXX guess should be better eg DEFUN + ;; \4 is not interesting; + ;; \5 is the explicitly-specified tag name. + ;; \6 is the line to start searching at; + ;; \7 is the char to start searching at. + (while (progn + (while (and + (eq (following-char) ?\f) + (looking-at "\f\n\\([^,\n]*\\),.*\n")) + (setq file (buffer-substring + (match-beginning 1) (match-end 1))) + (goto-char (match-end 0))) + (re-search-forward + "\ +^\\(\\([^\177]+[^-a-zA-Z0-9_$\177]+\\)?\\([-a-zA-Z0-9_$?:]+\\)\ +\[^-a-zA-Z0-9_$?:\177]*\\)\177\\(\\([^\n\001]+\\)\001\\)?\ +\\([0-9]+\\)?,\\([0-9]+\\)?\n" + nil t)) + (let ((tag (if (match-beginning 5) + ;; There is an explicit tag name. + (buffer-substring (match-beginning 5) (match-end 5)) + ;; No explicit tag name. Best guess. + (buffer-substring (match-beginning 3) (match-end 3)))) + (module (and file + (erlang-get-module-from-file-name file)))) + (intern tag table) + (if (stringp module) + (progn + (intern (concat module ":" tag) table) + ;; Only the first one will be stored in the table. + (intern (concat module ":") table)))))) + table)) + +;;; +;;; Prepare for other methods to run an Erlang slave process. +;;; + +(defvar erlang-shell-function 'inferior-erlang + "Command to execute start a new Erlang shell. + +Change this variable to use your favorite +Erlang compilation package.") + +(defvar erlang-shell-display-function 'inferior-erlang-run-or-select + "Command to execute to display Erlang shell. + +Change this variable to use your favorite +Erlang compilation package.") + +(defvar erlang-compile-function 'inferior-erlang-compile + "Command to execute to compile current buffer. + +Change this variable to use your favorite +Erlang compilation package.") + +(defvar erlang-compile-erlang-function "c" + "Erlang function to call to compile an erlang file.") + +(defvar erlang-compile-display-function 'inferior-erlang-run-or-select + "Command to execute to view last compilation. + +Change this variable to use your favorite +Erlang compilation package.") + +(defvar erlang-next-error-function 'inferior-erlang-next-error + "Command to execute to go to the next error. + +Change this variable to use your favorite Erlang compilation +package. Not used in Emacs 21.") + + +;;;###autoload +(defun erlang-shell () + "Start a new Erlang shell. + +The variable `erlang-shell-function' decides which method to use, +default is to start a new Erlang host. It is possible that, in the +future, a new shell on an already running host will be started." + (interactive) + (call-interactively erlang-shell-function)) + + +;;;###autoload (autoload 'run-erlang "erlang" "Start a new Erlang shell." t) + +;; It is customary for Emacs packages to supply a function on this +;; form, even though it violates the `erlang-*' name convention. +(defalias 'run-erlang 'erlang-shell) + + +(defun erlang-shell-display () + "Display an Erlang shell, or start a new." + (interactive) + (call-interactively erlang-shell-display-function)) + + +;;;###autoload +(defun erlang-compile () + "Compile Erlang module in current buffer." + (interactive) + (call-interactively erlang-compile-function)) + + +(defun erlang-compile-display () + "Display compilation output." + (interactive) + (call-interactively erlang-compile-display-function)) + + +(defun erlang-next-error () + "Display next error message from the latest compilation." + (interactive) + (call-interactively erlang-next-error-function)) + + + +;;; +;;; Erlang Shell Mode -- Major mode used for Erlang shells. +;;; + +;; This mode is designed to be implementation independent, +;; e.g. it does not assume that we are running an inferior +;; Erlang, there exists a lot of other possibilities. + + +(defvar erlang-shell-buffer-name "*erlang*" + "The name of the Erlang link shell buffer.") + +(defvar erlang-shell-mode-map nil + "Keymap used by Erlang shells.") + + +(defvar erlang-shell-mode-hook nil + "*User functions to run when an Erlang shell is started. + +This hook is used to change the behaviour of Erlang mode. It is +normally used by the user to personalise the programming environment. +When used in a site init file, it could be used to customise Erlang +mode for all users on the system. + +The function added to this hook is run every time a new Erlang +shell is started. + +See also `erlang-load-hook', a hook which is run once, when Erlang +mode is loaded, and `erlang-mode-hook' which is run every time a new +Erlang source file is loaded into Emacs.") + + +(defvar erlang-input-ring-file-name "~/.erlang_history" + "*When non-nil, file name used to store Erlang shell history information.") + + +(defun erlang-shell-mode () + "Major mode for interacting with an Erlang shell. + +We assume that we already are in Comint mode. + +The following special commands are available: +\\{erlang-shell-mode-map}" + (interactive) + (setq major-mode 'erlang-shell-mode) + (setq mode-name "Erlang Shell") + (erlang-mode-variables) + (if erlang-shell-mode-map + nil + (setq erlang-shell-mode-map (copy-keymap comint-mode-map)) + (erlang-shell-mode-commands erlang-shell-mode-map)) + (use-local-map erlang-shell-mode-map) + (unless inferior-erlang-use-cmm + ;; This was originally not a marker, but it needs to be, at least + ;; in Emacs 21, and should be backwards-compatible. Otherwise, + ;; would need to test whether compilation-parsing-end is a marker + ;; after requiring `compile'. + (set (make-local-variable 'compilation-parsing-end) (copy-marker 1)) + (set (make-local-variable 'compilation-error-list) nil) + (set (make-local-variable 'compilation-old-error-list) nil)) + ;; Needed when compiling directly from the Erlang shell. + (setq compilation-last-buffer (current-buffer)) + (erlang-add-compilation-alist erlang-error-regexp-alist) + (setq comint-prompt-regexp "^[^>=]*> *") + (setq comint-eol-on-send t) + (setq comint-input-ignoredups t) + (setq comint-scroll-show-maximum-output t) + (setq comint-scroll-to-bottom-on-output t) + ;; In Emacs 19.30, `add-hook' has got a `local' flag, use it. If + ;; the call fails, just call the normal `add-hook'. + (condition-case nil + (progn + (add-hook 'comint-output-filter-functions + 'inferior-erlang-strip-delete nil t) + (add-hook 'comint-output-filter-functions + 'inferior-erlang-strip-ctrl-m nil t)) + (error + (funcall (symbol-function 'make-local-hook) + 'comint-output-filter-functions) ; obsolete as of Emacs 21.1 + (add-hook 'comint-output-filter-functions 'inferior-erlang-strip-delete) + (add-hook 'comint-output-filter-functions 'inferior-erlang-strip-ctrl-m))) + ;; Some older versions of comint don't have an input ring. + (if (fboundp 'comint-read-input-ring) + (progn + (setq comint-input-ring-file-name erlang-input-ring-file-name) + (comint-read-input-ring t) + (make-local-variable 'kill-buffer-hook) + (add-hook 'kill-buffer-hook 'comint-write-input-ring))) + ;; At least in Emacs 21, we need to be in `compilation-minor-mode' + ;; for `next-error' to work. We can avoid it clobbering the shell + ;; keys thus. + (when inferior-erlang-use-cmm + (compilation-minor-mode 1) + (set (make-local-variable 'minor-mode-overriding-map-alist) + `((compilation-minor-mode + . ,(let ((map (make-sparse-keymap))) + ;; It would be useful to put keymap properties on the + ;; error lines so that we could use RET and mouse-2 + ;; on them directly. + (when (boundp 'compilation-skip-threshold) ; new compile.el + (define-key map [mouse-2] #'erlang-mouse-2-command) + (define-key map "\C-m" #'erlang-RET-command)) + (if (boundp 'compilation-menu-map) + (define-key map [menu-bar compilation] + (cons "Errors" compilation-menu-map))) + map))))) + (run-hooks 'erlang-shell-mode-hook)) + + +(defun erlang-mouse-2-command (event) + "Command bound to `mouse-2' in inferior Erlang buffer. +Selects Comint or Compilation mode command as appropriate." + (interactive "e") + (if (save-window-excursion + (save-excursion + (mouse-set-point event) + (consp (get-text-property (line-beginning-position) 'message)))) + (call-interactively (lookup-key compilation-mode-map [mouse-2])) + (call-interactively (lookup-key comint-mode-map [mouse-2])))) + +(defun erlang-RET-command () + "Command bound to `RET' in inferior Erlang buffer. +Selects Comint or Compilation mode command as appropriate." + (interactive) + (if (consp (get-text-property (line-beginning-position) 'message)) + (call-interactively (lookup-key compilation-mode-map "\C-m")) + (call-interactively (lookup-key comint-mode-map "\C-m")))) + +(defun erlang-shell-mode-commands (map) + (define-key map "\M-\t" 'erlang-complete-tag) + (define-key map "\C-a" 'comint-bol) ; Normally the other way around. + (define-key map "\C-c\C-a" 'beginning-of-line) + (define-key map "\C-d" nil) ; Was `comint-delchar-or-maybe-eof' + (define-key map "\M-\C-m" 'compile-goto-error) + (unless inferior-erlang-use-cmm + (define-key map "\C-x`" 'erlang-next-error))) + +;;; +;;; Inferior Erlang -- Run an Erlang shell as a subprocess. +;;; + +(defvar inferior-erlang-display-buffer-any-frame nil + "*When nil, `inferior-erlang-display-buffer' use only selected frame. +When t, all frames are searched. When 'raise, the frame is raised.") + +(defvar inferior-erlang-shell-type 'newshell + "The type of Erlang shell to use. + +When this variable is set to the atom `oldshell', the old shell is used. +When set to `newshell' the new shell is used. Should the variable be +nil, the default shell is used. + +This variable influence the setting of other variables.") + +(defvar inferior-erlang-machine "erl" + "*The name of the Erlang shell.") + +(defvar inferior-erlang-machine-options '() + "*The options used when activating the Erlang shell. + +This must be a list of strings.") + +(defvar inferior-erlang-process-name "inferior-erlang" + "The name of the inferior Erlang process.") + +(defvar inferior-erlang-buffer-name erlang-shell-buffer-name + "The name of the inferior Erlang buffer.") + +(defvar inferior-erlang-prompt-timeout 60 + "*Number of seconds before `inferior-erlang-wait-prompt' timeouts. + +The time specified is waited after every output made by the inferior +Erlang shell. When this variable is t, we assume that we always have +a prompt. When nil, we will wait forever, or until \\[keyboard-quit].") + +(defvar inferior-erlang-process nil + "Process of last invoked inferior Erlang, or nil.") + +(defvar inferior-erlang-buffer nil + "Buffer of last invoked inferior Erlang, or nil.") + +;;;###autoload +(defun inferior-erlang () + "Run an inferior Erlang. + +This is just like running Erlang in a normal shell, except that +an Emacs buffer is used for input and output. +\\<comint-mode-map> +The command line history can be accessed with \\[comint-previous-input] and \\[comint-next-input]. +The history is saved between sessions. + +Entry to this mode calls the functions in the variables +`comint-mode-hook' and `erlang-shell-mode-hook' with no arguments. + +The following commands imitate the usual Unix interrupt and +editing control characters: +\\{erlang-shell-mode-map}" + (interactive) + (require 'comint) + (let ((opts inferior-erlang-machine-options)) + (cond ((eq inferior-erlang-shell-type 'oldshell) + (setq opts (cons "-oldshell" opts))) + ((eq inferior-erlang-shell-type 'newshell) + (setq opts (append '("-newshell" "-env" "TERM" "vt100") opts)))) + (setq inferior-erlang-buffer + (apply 'make-comint + inferior-erlang-process-name inferior-erlang-machine + nil opts))) + (setq inferior-erlang-process + (get-buffer-process inferior-erlang-buffer)) + (if (> 21 erlang-emacs-major-version) ; funcalls to avoid compiler warnings + (funcall (symbol-function 'set-process-query-on-exit-flag) + inferior-erlang-process nil) + (funcall (symbol-function 'process-kill-without-query) inferior-erlang-process)) + (if erlang-inferior-shell-split-window + (switch-to-buffer-other-window inferior-erlang-buffer) + (switch-to-buffer inferior-erlang-buffer)) + (if (and (not (eq system-type 'windows-nt)) + (eq inferior-erlang-shell-type 'newshell)) + (setq comint-process-echoes t)) + ;; `rename-buffer' takes only one argument in Emacs 18. + (condition-case nil + (rename-buffer inferior-erlang-buffer-name t) + (error (rename-buffer inferior-erlang-buffer-name))) + (erlang-shell-mode)) + + +(defun inferior-erlang-run-or-select () + "Switch to an inferior Erlang buffer, possibly starting new process." + (interactive) + (if (null (inferior-erlang-running-p)) + (inferior-erlang) + (inferior-erlang-display-buffer t))) + + +(defun inferior-erlang-display-buffer (&optional select) + "Make the inferior Erlang process visible. +The window is returned. + +Should `inferior-erlang-display-buffer-any-frame' be nil the buffer is +displayed in the current frame. Should it be non-nil, and the buffer +already is visible in any other frame, no new window will be created. +Should it be the atom 'raise, the frame containing the window will +be raised. + +Should the optional argument SELECT be non-nil, the window is +selected. Should the window be in another frame, that frame is raised. + +Note, should the mouse pointer be places outside the raised frame, that +frame will become deselected before the next command." + (interactive) + (or (inferior-erlang-running-p) + (error "No inferior Erlang process is running")) + (let ((win (inferior-erlang-window + inferior-erlang-display-buffer-any-frame)) + (frames-p (fboundp 'selected-frame))) + (if (null win) + (let ((old-win (selected-window))) + (save-excursion + (switch-to-buffer-other-window inferior-erlang-buffer) + (setq win (selected-window))) + (select-window old-win)) + (if (and window-system + frames-p + (or select + (eq inferior-erlang-display-buffer-any-frame 'raise)) + (not (eq (selected-frame) (window-frame win)))) + (raise-frame (window-frame win)))) + (if select + (select-window win)) + (sit-for 0) + win)) + + +(defun inferior-erlang-running-p () + "Non-nil when an inferior Erlang is running." + (and inferior-erlang-process + (memq (process-status inferior-erlang-process) '(run open)) + inferior-erlang-buffer + (buffer-name inferior-erlang-buffer))) + + +(defun inferior-erlang-window (&optional all-frames) + "Return the window containing the inferior Erlang, or nil." + (and (inferior-erlang-running-p) + (if (and all-frames (>= erlang-emacs-major-version 19)) + (get-buffer-window inferior-erlang-buffer t) + (get-buffer-window inferior-erlang-buffer)))) + + +(defun inferior-erlang-wait-prompt () + "Wait until the inferior Erlang shell prompt appears." + (if (eq inferior-erlang-prompt-timeout t) + () + (or (inferior-erlang-running-p) + (error "No inferior Erlang shell is running")) + (save-excursion + (set-buffer inferior-erlang-buffer) + (let ((msg nil)) + (while (save-excursion + (goto-char (process-mark inferior-erlang-process)) + (forward-line 0) + (not (looking-at comint-prompt-regexp))) + (if msg + () + (setq msg t) + (message "Waiting for Erlang shell prompt (press C-g to abort).")) + (or (accept-process-output inferior-erlang-process + inferior-erlang-prompt-timeout) + (error "No Erlang shell prompt before timeout"))) + (if msg (message "")))))) + +(defun inferior-erlang-send-empty-cmd-unless-already-at-prompt () + "If not already at a prompt, try to send an empty cmd to get a prompt. +The empty command resembles hitting RET. This is useful in some +situations, for instance if a crash or error report from sasl +has been printed after the last prompt." + (save-excursion + (set-buffer inferior-erlang-buffer) + (if (> (point-max) 1) + ;; make sure we get a prompt if buffer contains data + (if (save-excursion + (goto-char (process-mark inferior-erlang-process)) + (forward-line 0) + (not (looking-at comint-prompt-regexp))) + (inferior-erlang-send-command ""))))) + +(autoload 'comint-send-input "comint") + +(defun inferior-erlang-send-command (cmd &optional hist) + "Send command CMD to the inferior Erlang. + +The contents of the current command line (if any) will +be placed at the next prompt. + +If optional second argument is non-nil the command is inserted into +the history list. + +Return the position after the newly inserted command." + (or (inferior-erlang-running-p) + (error "No inferior Erlang process is running")) + (let ((old-buffer (current-buffer)) + (insert-point (marker-position (process-mark inferior-erlang-process))) + (insert-length (if comint-process-echoes + 0 + (1+ (length cmd))))) + (set-buffer inferior-erlang-buffer) + (goto-char insert-point) + (insert cmd) + ;; Strange things happened if `comint-eol-on-send' is declared + ;; in the `let' expression above, but setq:d here. The + ;; `set-buffer' statement obviously makes the buffer local + ;; instance of `comint-eol-on-send' shadow this one. + ;; I'm considering this a bug in Elisp. + ;; + ;; This was previously cautioned against in the Lisp manual. It + ;; has been sorted out in Emacs 21. -- fx + (let ((comint-eol-on-send nil) + (comint-input-filter (if hist comint-input-filter 'ignore))) + (if (and (not erlang-xemacs-p) + (>= emacs-major-version 22)) + (comint-send-input nil t) + (comint-send-input))) + ;; Adjust all windows whose points are incorrect. + (if (null comint-process-echoes) + (walk-windows + (function + (lambda (window) + (if (and (eq (window-buffer window) inferior-erlang-buffer) + (= (window-point window) insert-point)) + (set-window-point window + (+ insert-point insert-length))))) + nil t)) + (set-buffer old-buffer) + (+ insert-point insert-length))) + + +(defun inferior-erlang-strip-delete (&optional s) + "Remove `^H' (delete) and the characters it was supposed to remove." + (interactive) + (if (and (boundp 'comint-last-input-end) + (boundp 'comint-last-output-start)) + (save-excursion + (goto-char + (if (interactive-p) + (symbol-value 'comint-last-input-end) + (symbol-value 'comint-last-output-start))) + (while (progn (skip-chars-forward "^\C-h") + (not (eq (point) (point-max)))) + (delete-char 1) + (or (bolp) + (backward-delete-char 1)))))) + + +;; Basically `comint-strip-ctrl-m', with a few extra checks. +(defun inferior-erlang-strip-ctrl-m (&optional string) + "Strip trailing `^M' characters from the current output group." + (interactive) + (if (and (boundp 'comint-last-input-end) + (boundp 'comint-last-output-start)) + (let ((pmark (process-mark (get-buffer-process (current-buffer))))) + (save-excursion + (goto-char + (if (interactive-p) + (symbol-value 'comint-last-input-end) + (symbol-value 'comint-last-output-start))) + (while (re-search-forward "\r+$" pmark t) + (replace-match "" t t)))))) + + +(defun inferior-erlang-compile (arg) + "Compile the file in the current buffer. + +With prefix arg, compiles for debug. + +Should Erlang return `{error, nofile}' it could not load the object +module after completing the compilation. This is due to a bug in the +compile command `c' when using the option `outdir'. + +There exists two workarounds for this bug: + + 1) Place the directory in the Erlang load path. + + 2) Set the Emacs variable `erlang-compile-use-outdir' to nil. + To do so, place the following line in your `~/.emacs'-file: + (setq erlang-compile-use-outdir nil)" + (interactive "P") + (save-some-buffers) + (inferior-erlang-prepare-for-input) + (let* ((dir (inferior-erlang-compile-outdir)) +;;; (file (file-name-nondirectory (buffer-file-name))) + (noext (substring (buffer-file-name) 0 -4)) + (opts (append (list (cons 'outdir dir)) + (if current-prefix-arg + (list 'debug_info 'export_all)) + erlang-compile-extra-opts)) + end) + (save-excursion + (set-buffer inferior-erlang-buffer) + (compilation-forget-errors)) + (setq end (inferior-erlang-send-command + (inferior-erlang-compute-compile-command noext opts) + nil)) + (sit-for 0) + (inferior-erlang-wait-prompt) + (save-excursion + (set-buffer inferior-erlang-buffer) + (setq compilation-error-list nil) + (set-marker compilation-parsing-end end)) + (setq compilation-last-buffer inferior-erlang-buffer))) + +(defun inferior-erlang-prepare-for-input (&optional no-display) + "Create an inferior erlang buffer if needed and ready it for input. +The buffer is displayed, according to `inferior-erlang-display-buffer' +unless the optional NO-DISPLAY is non-nil." + (or (inferior-erlang-running-p) + (save-excursion + (inferior-erlang))) + (or (inferior-erlang-running-p) + (error "Error starting inferior Erlang shell")) + (if (not no-display) + (inferior-erlang-display-buffer)) + (inferior-erlang-send-empty-cmd-unless-already-at-prompt) + (sit-for 0) + (inferior-erlang-wait-prompt)) + +(defun inferior-erlang-compile-outdir () + "Return the directory to compile the current buffer into." + (let* ((buffer-dir (directory-file-name + (file-name-directory (buffer-file-name)))) + (parent-dir (directory-file-name + (file-name-directory buffer-dir))) + (ebin-dir (concat (file-name-as-directory parent-dir) "ebin")) + (buffer-dir-base-name (file-name-nondirectory + (expand-file-name + (concat (file-name-as-directory buffer-dir) + "."))))) + (if (and (string= buffer-dir-base-name "src") + (file-directory-p ebin-dir)) + (file-name-as-directory ebin-dir) + (file-name-as-directory buffer-dir)))) + +(defun inferior-erlang-compute-compile-command (module-name opts) + (let* ((out-dir-opt (assoc 'outdir opts)) + (out-dir (cdr out-dir-opt))) + (if erlang-compile-use-outdir + (format "%s(\"%s\"%s)." + erlang-compile-erlang-function + module-name + (inferior-erlang-format-comma-opts opts)) + (let (;; Hopefully, noone else will ever use these... + (tmpvar "Tmp7236") + (tmpvar2 "Tmp8742")) + (format + (concat + "f(%s), {ok, %s} = file:get_cwd(), " + "file:set_cwd(\"%s\"), " + "%s = %s(\"%s\"%s), file:set_cwd(%s), f(%s), %s.") + tmpvar2 tmpvar + out-dir + tmpvar2 + erlang-compile-erlang-function + module-name (inferior-erlang-format-comma-opts + (remq out-dir-opt opts)) + tmpvar tmpvar tmpvar2))))) + +(defun inferior-erlang-format-comma-opts (opts) + (if (null opts) + "" + (concat ", " (inferior-erlang-format-opts opts)))) + +(defun inferior-erlang-format-opts (opts) + (concat "[" (inferior-erlang-string-join (mapcar 'inferior-erlang-format-opt + opts) + ", ") + "]")) + +(defun inferior-erlang-format-opt (opt) + (cond ((stringp opt) (concat "\"" opt "\"")) + ((atom opt) (format "%s" opt)) + ((consp opt) (concat "{" (inferior-erlang-string-join + (mapcar 'inferior-erlang-format-opt + (list (car opt) (cdr opt))) + ", ") + "}")) + (t (error (format "Unexpected opt %s" opt))))) + +(defun inferior-erlang-string-join (strs sep) + (let ((result (or (car strs) ""))) + (setq strs (cdr strs)) + (while strs + (setq result (concat result sep (car strs))) + (setq strs (cdr strs))) + result)) + +;; `next-error' only accepts buffers with major mode `compilation-mode' +;; or with the minor mode `compilation-minor-mode' activated. +;; (To activate the minor mode is out of the question, since it will +;; ruin the inferior Erlang keymap.) +;; This is done differently in Emacs 21. +(defun inferior-erlang-next-error (&optional argp) + "Just like `next-error'. +Capable of finding error messages in an inferior Erlang buffer." + (interactive "P") + (let ((done nil) + (buf (or (and (boundp 'next-error-last-buffer) + next-error-last-buffer) + (and (boundp 'compilation-last-buffer) + compilation-last-buffer)))) + (if (and (bufferp buf) + (save-excursion + (set-buffer buf) + (and (eq major-mode 'erlang-shell-mode) + (setq major-mode 'compilation-mode)))) + (unwind-protect + (progn + (setq done t) + (next-error argp)) + (save-excursion + (set-buffer buf) + (setq major-mode 'erlang-shell-mode)))) + (or done + (next-error argp)))) + + +(defun inferior-erlang-change-directory (&optional dir) + "Make the inferior Erlang change directory. +The default is to go to the directory of the current buffer." + (interactive) + (or dir (setq dir (file-name-directory (buffer-file-name)))) + (or (inferior-erlang-running-p) + (error "No inferior Erlang is running")) + (inferior-erlang-display-buffer) + (inferior-erlang-send-empty-cmd-unless-already-at-prompt) + (inferior-erlang-wait-prompt) + (inferior-erlang-send-command (format "cd('%s')." dir) nil)) + +(defun erlang-align-arrows (start end) + "Align arrows (\"->\") in function clauses from START to END. +When called interactively, aligns arrows after function clauses inside +the region. + +With a prefix argument, aligns all arrows, not just those in function +clauses. + +Example: + +sum(L) -> sum(L, 0). +sum([H|T], Sum) -> sum(T, Sum + H); +sum([], Sum) -> Sum. + +becomes: + +sum(L) -> sum(L, 0). +sum([H|T], Sum) -> sum(T, Sum + H); +sum([], Sum) -> Sum." + (interactive "r") + (save-excursion + (let (;; regexp for matching arrows. without a prefix argument, + ;; the regexp matches function heads. With a prefix, it + ;; matches any arrow. + (re (if current-prefix-arg + "^.*\\(\\)->" + (eval-when-compile + (concat "^" erlang-atom-regexp ".*\\(\\)->")))) + ;; part of regexp matching directly before the arrow + (arrow-match-pos (if current-prefix-arg + 1 + (1+ erlang-atom-regexp-matches))) + ;; accumulator for positions where arrows are found, ordered + ;; by buffer position (from greatest to smallest) + (arrow-positions '()) + ;; accumulator for longest distance from start of line to arrow + (most-indent 0) + ;; marker to track the end of the region we're aligning + (end-marker (progn (goto-char end) + (point-marker)))) + ;; Pass 1: Find the arrow positions, adjust the whitespace + ;; before each arrow to one space, and find the greatest + ;; indentation level. + (goto-char start) + (while (re-search-forward re end-marker t) + (goto-char (match-beginning arrow-match-pos)) + (just-one-space) ; adjust whitespace + (setq arrow-positions (cons (point) arrow-positions)) + (setq most-indent (max most-indent (erlang-column-number)))) + (set-marker end-marker nil) ; free the marker + ;; Pass 2: Insert extra padding so that all arrow indentation is + ;; equal. This is done last-to-first by buffer position, so that + ;; inserting spaces before one arrow doesn't change the + ;; positions of the next ones. + (mapc (lambda (arrow-pos) + (goto-char arrow-pos) + (let* ((pad (- most-indent (erlang-column-number)))) + (when (> pad 0) + (insert-char ?\ pad)))) + arrow-positions)))) + +(defun erlang-column-number () + "Return the column number of the current position in the buffer. +Tab characters are counted by their visual width." + (string-width (buffer-substring (line-beginning-position) (point)))) + +(defun erlang-current-defun () + "`add-log-current-defun-function' for Erlang." + (save-excursion + (erlang-beginning-of-function) + (if (looking-at "[a-z0-9_]+") + (match-string 0)))) + +;; Aliases for backward compatibility with older versions of Erlang Mode. +;; +;; Unfortuantely, older versions of Emacs doesn't have `defalias' and +;; `make-obsolete' so we have to define our own `obsolete' function. + +(defun erlang-obsolete (sym newdef) + "Make the obsolete function SYM refer to the defined function NEWDEF. + +Simplified version of a combination `defalias' and `make-obsolete', +it assumes that NEWDEF is loaded." + (defalias sym (symbol-function newdef)) + (if (fboundp 'make-obsolete) + (make-obsolete sym newdef))) + + +(erlang-obsolete 'calculate-erlang-indent 'erlang-calculate-indent) +(erlang-obsolete 'calculate-erlang-stack-indent + 'erlang-calculate-stack-indent) +(erlang-obsolete 'at-erlang-keyword 'erlang-at-keyword) +(erlang-obsolete 'at-erlang-operator 'erlang-at-operator) +(erlang-obsolete 'beginning-of-erlang-clause 'erlang-beginning-of-clause) +(erlang-obsolete 'end-of-erlang-clause 'erlang-end-of-clause) +(erlang-obsolete 'mark-erlang-clause 'erlang-mark-clause) +(erlang-obsolete 'beginning-of-erlang-function 'erlang-beginning-of-function) +(erlang-obsolete 'end-of-erlang-function 'erlang-end-of-function) +(erlang-obsolete 'mark-erlang-function 'erlang-mark-function) +(erlang-obsolete 'pass-over-erlang-clause 'erlang-pass-over-function) +(erlang-obsolete 'name-of-erlang-function 'erlang-name-of-function) + + +;; Fixme: shouldn't redefine `set-visited-file-name' anyhow -- see above. +(defconst erlang-unload-hook + (list (lambda () + (defalias 'set-visited-file-name + 'erlang-orig-set-visited-file-name) + (when (featurep 'advice) + (ad-unadvise 'Man-notify-when-ready) + (ad-unadvise 'set-visited-file-name))))) + + +(defun erlang-string-to-int (string) + (if (fboundp 'string-to-number) + (string-to-number string) + (funcall (symbol-function 'string-to-int) string))) + +;; The end... + +(provide 'erlang) + +(run-hooks 'erlang-load-hook) + +;; Local variables: +;; coding: iso-8859-1 +;; End: + +;;; erlang.el ends here |