From 030e6ef2efaad12d485cec1727c4b68c09c6c584 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Wed, 12 Apr 2017 15:19:23 +0200 Subject: Add back TypEr to the main OTP repository It turned out that the dependencies between Dialyzer and TypEr makes it impractical to have TypEr in a separate repository. Add it back to the OTP repository, but put the Erlang module 'typer' in the dialyzer application. --- lib/dialyzer/doc/src/Makefile | 2 +- lib/dialyzer/doc/src/ref_man.xml | 1 + lib/dialyzer/doc/src/typer.xml | 157 ++++++ lib/dialyzer/src/Makefile | 6 +- lib/dialyzer/src/dialyzer.app.src | 3 +- lib/dialyzer/src/typer.erl | 1110 +++++++++++++++++++++++++++++++++++++ 6 files changed, 1276 insertions(+), 3 deletions(-) create mode 100644 lib/dialyzer/doc/src/typer.xml create mode 100644 lib/dialyzer/src/typer.erl (limited to 'lib') diff --git a/lib/dialyzer/doc/src/Makefile b/lib/dialyzer/doc/src/Makefile index 77d0a6fc68..8fe6cd30eb 100644 --- a/lib/dialyzer/doc/src/Makefile +++ b/lib/dialyzer/doc/src/Makefile @@ -34,7 +34,7 @@ RELSYSDIR = $(RELEASE_PATH)/lib/$(APPLICATION)-$(VSN) # Target Specs # ---------------------------------------------------- XML_APPLICATION_FILES = ref_man.xml -XML_REF3_FILES = dialyzer.xml +XML_REF3_FILES = dialyzer.xml typer.xml XML_PART_FILES = part.xml part_notes.xml XML_CHAPTER_FILES = dialyzer_chapter.xml notes.xml diff --git a/lib/dialyzer/doc/src/ref_man.xml b/lib/dialyzer/doc/src/ref_man.xml index ddac047f2e..d820fc5e00 100644 --- a/lib/dialyzer/doc/src/ref_man.xml +++ b/lib/dialyzer/doc/src/ref_man.xml @@ -31,5 +31,6 @@ + diff --git a/lib/dialyzer/doc/src/typer.xml b/lib/dialyzer/doc/src/typer.xml new file mode 100644 index 0000000000..abd7f07ccf --- /dev/null +++ b/lib/dialyzer/doc/src/typer.xml @@ -0,0 +1,157 @@ + + + + +
+ + 20062016 + Ericsson AB. All Rights Reserved. + + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + + + + typer + + + 2017-04-13 + + type.xml +
+ typer + Typer, a Type annotator for ERlang programs. + + +

TypEr shows type information for Erlang modules to the user. + Additionally, it can annotate the code of files with such type + information.

+ + +
+ + Using TypEr from the Command Line +

TypEr is used from the command-line. This section provides a + brief description of the options. The same information can be + obtained by writing the following in a shell:

+ + +typer --help + +

Usage:

+ + +typer [--help] [--version] [--plt PLT] [--edoc] + [--show | --show-exported | --annotate | --annotate-inc-files] + [-Ddefine]* [-I include_dir]* [-pa dir]* [-pz dir]* + [-T application]* [-r] file* + + +

* denotes that multiple occurrences of the option are possible.

+ + +

Options:

+ + + + --r + +

Search directories recursively for .erl files below them.

+ + --show + +

Print type specifications for all functions on stdout. + (This is the default behaviour; this option is not really + needed.)

+ + + --show-exported (or show_exported) + +

Same as --show, but print specifications for + exported functions only. Specs are displayed sorted + alphabetically on the function's name.

+ + + --annotate + +

Annotate the specified files with type specifications.

+ + + --annotate-inc-files + +

Same as --annotate but annotates all + -include() files as well as all .erl files. (Use this + option with caution - it has not been tested much).

+ + + --edoc + +

Print type information as Edoc @spec comments, not + as type specs.

+ + + --plt + +

Use the specified dialyzer PLT file rather than the default one.

+ + + -T file* + +

The specified file(s) already contain type specifications + and these are to be trusted in order to print specs for the + rest of the files. (Multiple files or dirs, separated by + spaces, can be specified.)

+ + + -Dname (or -Dname=value) + +

Pass the defined name(s) to TypEr. (**)

+ + + -I + +

Pass the include_dir to TypEr. (**)

+ + + -pa dir + +

Include dir in the path for Erlang. This is useful + when analyzing files that have -include_lib() + directives or use parse transforms.

+ + + -pz dir + +

Include dir in the path for Erlang. This is useful + when analyzing files that have -include_lib() + directives or use parse transforms.

+ + + --version (or -v) + +

Print the TypEr version and some more information and + exit.

+ + + + + +

** options -D and -I work both + from the command line and in the TypEr GUI; the syntax of + defines and includes is the same as that used by + erlc(1).

+ + +
+ + diff --git a/lib/dialyzer/src/Makefile b/lib/dialyzer/src/Makefile index 256f20f549..28f74ed441 100644 --- a/lib/dialyzer/src/Makefile +++ b/lib/dialyzer/src/Makefile @@ -68,7 +68,8 @@ MODULES = \ dialyzer_typesig \ dialyzer_coordinator \ dialyzer_worker \ - dialyzer_utils + dialyzer_utils \ + typer HRL_FILES= dialyzer.hrl dialyzer_gui_wx.hrl ERL_FILES= $(MODULES:%=%.erl) @@ -117,6 +118,9 @@ $(EBIN)/dialyzer_plt.$(EMULATOR): dialyzer_plt.erl ../vsn.mk $(EBIN)/dialyzer_gui_wx.$(EMULATOR): dialyzer_gui_wx.erl ../vsn.mk $(erlc_verbose)erlc -W $(ERL_COMPILE_FLAGS) -DVSN="\"v$(VSN)\"" -o$(EBIN) dialyzer_gui_wx.erl +$(EBIN)/typer.$(EMULATOR): typer.erl ../vsn.mk + $(erlc_verbose)erlc -W $(ERL_COMPILE_FLAGS) -DVSN="\"v$(VSN)\"" -o$(EBIN) typer.erl + $(APP_TARGET): $(APP_SRC) ../vsn.mk $(vsn_verbose)sed -e 's;%VSN%;$(VSN);' $< > $@ diff --git a/lib/dialyzer/src/dialyzer.app.src b/lib/dialyzer/src/dialyzer.app.src index f517c51ec1..5f803875b0 100644 --- a/lib/dialyzer/src/dialyzer.app.src +++ b/lib/dialyzer/src/dialyzer.app.src @@ -43,7 +43,8 @@ dialyzer_typesig, dialyzer_utils, dialyzer_timing, - dialyzer_worker]}, + dialyzer_worker, + typer]}, {registered, []}, {applications, [compiler, hipe, kernel, stdlib, wx]}, {env, []}, diff --git a/lib/dialyzer/src/typer.erl b/lib/dialyzer/src/typer.erl new file mode 100644 index 0000000000..18c4fe902d --- /dev/null +++ b/lib/dialyzer/src/typer.erl @@ -0,0 +1,1110 @@ +%% -*- erlang-indent-level: 2 -*- +%% +%% Licensed under the Apache License, Version 2.0 (the "License"); +%% you may not use this file except in compliance with the License. +%% You may obtain a copy of the License at +%% +%% http://www.apache.org/licenses/LICENSE-2.0 +%% +%% Unless required by applicable law or agreed to in writing, software +%% distributed under the License is distributed on an "AS IS" BASIS, +%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +%% See the License for the specific language governing permissions and +%% limitations under the License. + +%%----------------------------------------------------------------------- +%% File : typer.erl +%% Author(s) : The first version of typer was written by Bingwen He +%% with guidance from Kostis Sagonas and Tobias Lindahl. +%% Since June 2008 typer is maintained by Kostis Sagonas. +%% Description : An Erlang/OTP application that shows type information +%% for Erlang modules to the user. Additionally, it can +%% annotate the code of files with such type information. +%%----------------------------------------------------------------------- + +-module(typer). + +-export([start/0]). + +%%----------------------------------------------------------------------- + +-define(SHOW, show). +-define(SHOW_EXPORTED, show_exported). +-define(ANNOTATE, annotate). +-define(ANNOTATE_INC_FILES, annotate_inc_files). + +-type mode() :: ?SHOW | ?SHOW_EXPORTED | ?ANNOTATE | ?ANNOTATE_INC_FILES. + +%%----------------------------------------------------------------------- + +-type files() :: [file:filename()]. +-type callgraph() :: dialyzer_callgraph:callgraph(). +-type codeserver() :: dialyzer_codeserver:codeserver(). +-type plt() :: dialyzer_plt:plt(). + +-record(analysis, + {mode :: mode() | 'undefined', + macros = [] :: [{atom(), term()}], + includes = [] :: files(), + codeserver = dialyzer_codeserver:new():: codeserver(), + callgraph = dialyzer_callgraph:new() :: callgraph(), + files = [] :: files(), % absolute names + plt = none :: 'none' | file:filename(), + no_spec = false :: boolean(), + show_succ = false :: boolean(), + %% For choosing between specs or edoc @spec comments + edoc = false :: boolean(), + %% Files in 'fms' are compilable with option 'to_pp'; we keep them + %% as {FileName, ModuleName} in case the ModuleName is different + fms = [] :: [{file:filename(), module()}], + ex_func = map__new() :: map_dict(), + record = map__new() :: map_dict(), + func = map__new() :: map_dict(), + inc_func = map__new() :: map_dict(), + trust_plt = dialyzer_plt:new() :: plt()}). +-type analysis() :: #analysis{}. + +-record(args, {files = [] :: files(), + files_r = [] :: files(), + trusted = [] :: files()}). +-type args() :: #args{}. + +%%-------------------------------------------------------------------- + +-spec start() -> no_return(). + +start() -> + {Args, Analysis} = process_cl_args(), + %% io:format("Args: ~p\n", [Args]), + %% io:format("Analysis: ~p\n", [Analysis]), + Timer = dialyzer_timing:init(false), + TrustedFiles = filter_fd(Args#args.trusted, [], fun is_erl_file/1), + Analysis2 = extract(Analysis, TrustedFiles), + All_Files = get_all_files(Args), + %% io:format("All_Files: ~p\n", [All_Files]), + Analysis3 = Analysis2#analysis{files = All_Files}, + Analysis4 = collect_info(Analysis3), + %% io:format("Final: ~p\n", [Analysis4#analysis.fms]), + TypeInfo = get_type_info(Analysis4), + dialyzer_timing:stop(Timer), + show_or_annotate(TypeInfo), + %% io:format("\nTyper analysis finished\n"), + erlang:halt(0). + +%%-------------------------------------------------------------------- + +-spec extract(analysis(), files()) -> analysis(). + +extract(#analysis{macros = Macros, + includes = Includes, + trust_plt = TrustPLT} = Analysis, TrustedFiles) -> + %% io:format("--- Extracting trusted typer_info... "), + Ds = [{d, Name, Value} || {Name, Value} <- Macros], + CodeServer = dialyzer_codeserver:new(), + Fun = + fun(File, CS) -> + %% We include one more dir; the one above the one we are trusting + %% E.g, for /home/tests/typer_ann/test.ann.erl, we should include + %% /home/tests/ rather than /home/tests/typer_ann/ + AllIncludes = [filename:dirname(filename:dirname(File)) | Includes], + Is = [{i, Dir} || Dir <- AllIncludes], + CompOpts = dialyzer_utils:src_compiler_opts() ++ Is ++ Ds, + case dialyzer_utils:get_abstract_code_from_src(File, CompOpts) of + {ok, AbstractCode} -> + case dialyzer_utils:get_record_and_type_info(AbstractCode) of + {ok, RecDict} -> + Mod = list_to_atom(filename:basename(File, ".erl")), + case dialyzer_utils:get_spec_info(Mod, AbstractCode, RecDict) of + {ok, SpecDict, CbDict} -> + CS1 = dialyzer_codeserver:store_temp_records(Mod, RecDict, CS), + dialyzer_codeserver:store_temp_contracts(Mod, SpecDict, CbDict, CS1); + {error, Reason} -> compile_error([Reason]) + end; + {error, Reason} -> compile_error([Reason]) + end; + {error, Reason} -> compile_error(Reason) + end + end, + CodeServer1 = lists:foldl(Fun, CodeServer, TrustedFiles), + %% Process remote types + NewCodeServer = + try + CodeServer2 = + dialyzer_utils:merge_types(CodeServer1, + TrustPLT), % XXX change to the PLT? + NewExpTypes = dialyzer_codeserver:get_temp_exported_types(CodeServer1), + case sets:size(NewExpTypes) of 0 -> ok end, + CodeServer3 = dialyzer_codeserver:finalize_exported_types(NewExpTypes, CodeServer2), + CodeServer4 = dialyzer_utils:process_record_remote_types(CodeServer3), + dialyzer_contracts:process_contract_remote_types(CodeServer4) + catch + throw:{error, ErrorMsg} -> + compile_error(ErrorMsg) + end, + %% Create TrustPLT + ContractsDict = dialyzer_codeserver:get_contracts(NewCodeServer), + Contracts = orddict:from_list(dict:to_list(ContractsDict)), + NewTrustPLT = dialyzer_plt:insert_contract_list(TrustPLT, Contracts), + Analysis#analysis{trust_plt = NewTrustPLT}. + +%%-------------------------------------------------------------------- + +-spec get_type_info(analysis()) -> analysis(). + +get_type_info(#analysis{callgraph = CallGraph, + trust_plt = TrustPLT, + codeserver = CodeServer} = Analysis) -> + StrippedCallGraph = remove_external(CallGraph, TrustPLT), + %% io:format("--- Analyzing callgraph... "), + try + NewMiniPlt = dialyzer_succ_typings:analyze_callgraph(StrippedCallGraph, + TrustPLT, + CodeServer), + NewPlt = dialyzer_plt:restore_full_plt(NewMiniPlt), + Analysis#analysis{callgraph = StrippedCallGraph, trust_plt = NewPlt} + catch + error:What -> + fatal_error(io_lib:format("Analysis failed with message: ~p", + [{What, erlang:get_stacktrace()}])); + throw:{dialyzer_succ_typing_error, Msg} -> + fatal_error(io_lib:format("Analysis failed with message: ~s", [Msg])) + end. + +-spec remove_external(callgraph(), plt()) -> callgraph(). + +remove_external(CallGraph, PLT) -> + {StrippedCG0, Ext} = dialyzer_callgraph:remove_external(CallGraph), + case get_external(Ext, PLT) of + [] -> ok; + Externals -> + msg(io_lib:format(" Unknown functions: ~p\n", [lists:usort(Externals)])), + ExtTypes = rcv_ext_types(), + case ExtTypes of + [] -> ok; + _ -> msg(io_lib:format(" Unknown types: ~p\n", [ExtTypes])) + end + end, + StrippedCG0. + +-spec get_external([{mfa(), mfa()}], plt()) -> [mfa()]. + +get_external(Exts, Plt) -> + Fun = fun ({_From, To = {M, F, A}}, Acc) -> + case dialyzer_plt:contains_mfa(Plt, To) of + false -> + case erl_bif_types:is_known(M, F, A) of + true -> Acc; + false -> [To|Acc] + end; + true -> Acc + end + end, + lists:foldl(Fun, [], Exts). + +%%-------------------------------------------------------------------- +%% Showing type information or annotating files with such information. +%%-------------------------------------------------------------------- + +-define(TYPER_ANN_DIR, "typer_ann"). + +-type line() :: non_neg_integer(). +-type fa() :: {atom(), arity()}. +-type func_info() :: {line(), atom(), arity()}. + +-record(info, {records = maps:new() :: erl_types:type_table(), + functions = [] :: [func_info()], + types = map__new() :: map_dict(), + edoc = false :: boolean()}). +-record(inc, {map = map__new() :: map_dict(), filter = [] :: files()}). +-type inc() :: #inc{}. + +-spec show_or_annotate(analysis()) -> 'ok'. + +show_or_annotate(#analysis{mode = Mode, fms = Files} = Analysis) -> + case Mode of + ?SHOW -> show(Analysis); + ?SHOW_EXPORTED -> show(Analysis); + ?ANNOTATE -> + Fun = fun ({File, Module}) -> + Info = get_final_info(File, Module, Analysis), + write_typed_file(File, Info) + end, + lists:foreach(Fun, Files); + ?ANNOTATE_INC_FILES -> + IncInfo = write_and_collect_inc_info(Analysis), + write_inc_files(IncInfo) + end. + +write_and_collect_inc_info(Analysis) -> + Fun = fun ({File, Module}, Inc) -> + Info = get_final_info(File, Module, Analysis), + write_typed_file(File, Info), + IncFuns = get_functions(File, Analysis), + collect_imported_functions(IncFuns, Info#info.types, Inc) + end, + NewInc = lists:foldl(Fun, #inc{}, Analysis#analysis.fms), + clean_inc(NewInc). + +write_inc_files(Inc) -> + Fun = + fun (File) -> + Val = map__lookup(File, Inc#inc.map), + %% Val is function with its type info + %% in form [{{Line,F,A},Type}] + Functions = [Key || {Key, _} <- Val], + Val1 = [{{F,A},Type} || {{_Line,F,A},Type} <- Val], + Info = #info{types = map__from_list(Val1), + records = maps:new(), + %% Note we need to sort functions here! + functions = lists:keysort(1, Functions)}, + %% io:format("Types ~p\n", [Info#info.types]), + %% io:format("Functions ~p\n", [Info#info.functions]), + %% io:format("Records ~p\n", [Info#info.records]), + write_typed_file(File, Info) + end, + lists:foreach(Fun, dict:fetch_keys(Inc#inc.map)). + +show(Analysis) -> + Fun = fun ({File, Module}) -> + Info = get_final_info(File, Module, Analysis), + show_type_info(File, Info) + end, + lists:foreach(Fun, Analysis#analysis.fms). + +get_final_info(File, Module, Analysis) -> + Records = get_records(File, Analysis), + Types = get_types(Module, Analysis, Records), + Functions = get_functions(File, Analysis), + Edoc = Analysis#analysis.edoc, + #info{records = Records, functions = Functions, types = Types, edoc = Edoc}. + +collect_imported_functions(Functions, Types, Inc) -> + %% Coming from other sourses, including: + %% FIXME: How to deal with yecc-generated file???? + %% --.yrl (yecc-generated file)??? + %% -- yeccpre.hrl (yecc-generated file)??? + %% -- other cases + Fun = fun ({File, _} = Obj, I) -> + case is_yecc_gen(File, I) of + {true, NewI} -> NewI; + {false, NewI} -> + check_imported_functions(Obj, NewI, Types) + end + end, + lists:foldl(Fun, Inc, Functions). + +-spec is_yecc_gen(file:filename(), inc()) -> {boolean(), inc()}. + +is_yecc_gen(File, #inc{filter = Fs} = Inc) -> + case lists:member(File, Fs) of + true -> {true, Inc}; + false -> + case filename:extension(File) of + ".yrl" -> + Rootname = filename:rootname(File, ".yrl"), + Obj = Rootname ++ ".erl", + case lists:member(Obj, Fs) of + true -> {true, Inc}; + false -> + NewInc = Inc#inc{filter = [Obj|Fs]}, + {true, NewInc} + end; + _ -> + case filename:basename(File) of + "yeccpre.hrl" -> {true, Inc}; + _ -> {false, Inc} + end + end + end. + +check_imported_functions({File, {Line, F, A}}, Inc, Types) -> + IncMap = Inc#inc.map, + FA = {F, A}, + Type = get_type_info(FA, Types), + case map__lookup(File, IncMap) of + none -> %% File is not added. Add it + Obj = {File,[{FA, {Line, Type}}]}, + NewMap = map__insert(Obj, IncMap), + Inc#inc{map = NewMap}; + Val -> %% File is already in. Check. + case lists:keyfind(FA, 1, Val) of + false -> + %% Function is not in; add it + Obj = {File, Val ++ [{FA, {Line, Type}}]}, + NewMap = map__insert(Obj, IncMap), + Inc#inc{map = NewMap}; + Type -> + %% Function is in and with same type + Inc; + _ -> + %% Function is in but with diff type + inc_warning(FA, File), + Elem = lists:keydelete(FA, 1, Val), + NewMap = case Elem of + [] -> map__remove(File, IncMap); + _ -> map__insert({File, Elem}, IncMap) + end, + Inc#inc{map = NewMap} + end + end. + +inc_warning({F, A}, File) -> + io:format(" ***Warning: Skip function ~p/~p ", [F, A]), + io:format("in file ~p because of inconsistent type\n", [File]). + +clean_inc(Inc) -> + Inc1 = remove_yecc_generated_file(Inc), + normalize_obj(Inc1). + +remove_yecc_generated_file(#inc{filter = Filter} = Inc) -> + Fun = fun (Key, #inc{map = Map} = I) -> + I#inc{map = map__remove(Key, Map)} + end, + lists:foldl(Fun, Inc, Filter). + +normalize_obj(TmpInc) -> + Fun = fun (Key, Val, Inc) -> + NewVal = [{{Line,F,A},Type} || {{F,A},{Line,Type}} <- Val], + map__insert({Key, NewVal}, Inc) + end, + TmpInc#inc{map = map__fold(Fun, map__new(), TmpInc#inc.map)}. + +get_records(File, Analysis) -> + map__lookup(File, Analysis#analysis.record). + +get_types(Module, Analysis, Records) -> + TypeInfoPlt = Analysis#analysis.trust_plt, + TypeInfo = + case dialyzer_plt:lookup_module(TypeInfoPlt, Module) of + none -> []; + {value, List} -> List + end, + CodeServer = Analysis#analysis.codeserver, + TypeInfoList = + case Analysis#analysis.show_succ of + true -> + [convert_type_info(I) || I <- TypeInfo]; + false -> + [get_type(I, CodeServer, Records) || I <- TypeInfo] + end, + map__from_list(TypeInfoList). + +convert_type_info({{_M, F, A}, Range, Arg}) -> + {{F, A}, {Range, Arg}}. + +get_type({{M, F, A} = MFA, Range, Arg}, CodeServer, Records) -> + case dialyzer_codeserver:lookup_mfa_contract(MFA, CodeServer) of + error -> + {{F, A}, {Range, Arg}}; + {ok, {_FileLine, Contract, _Xtra}} -> + Sig = erl_types:t_fun(Arg, Range), + case dialyzer_contracts:check_contract(Contract, Sig) of + ok -> {{F, A}, {contract, Contract}}; + {error, {extra_range, _, _}} -> + {{F, A}, {contract, Contract}}; + {error, {overlapping_contract, []}} -> + {{F, A}, {contract, Contract}}; + {error, invalid_contract} -> + CString = dialyzer_contracts:contract_to_string(Contract), + SigString = dialyzer_utils:format_sig(Sig, Records), + Msg = io_lib:format("Error in contract of function ~w:~w/~w\n" + "\t The contract is: " ++ CString ++ "\n" ++ + "\t but the inferred signature is: ~s", + [M, F, A, SigString]), + fatal_error(Msg); + {error, ErrorStr} when is_list(ErrorStr) -> % ErrorStr is a string() + Msg = io_lib:format("Error in contract of function ~w:~w/~w: ~s", + [M, F, A, ErrorStr]), + fatal_error(Msg) + end + end. + +get_functions(File, Analysis) -> + case Analysis#analysis.mode of + ?SHOW -> + Funcs = map__lookup(File, Analysis#analysis.func), + Inc_Funcs = map__lookup(File, Analysis#analysis.inc_func), + remove_module_info(Funcs) ++ normalize_incFuncs(Inc_Funcs); + ?SHOW_EXPORTED -> + Ex_Funcs = map__lookup(File, Analysis#analysis.ex_func), + remove_module_info(Ex_Funcs); + ?ANNOTATE -> + Funcs = map__lookup(File, Analysis#analysis.func), + remove_module_info(Funcs); + ?ANNOTATE_INC_FILES -> + map__lookup(File, Analysis#analysis.inc_func) + end. + +normalize_incFuncs(Functions) -> + [FunInfo || {_FileName, FunInfo} <- Functions]. + +-spec remove_module_info([func_info()]) -> [func_info()]. + +remove_module_info(FunInfoList) -> + F = fun ({_,module_info,0}) -> false; + ({_,module_info,1}) -> false; + ({Line,F,A}) when is_integer(Line), is_atom(F), is_integer(A) -> true + end, + lists:filter(F, FunInfoList). + +write_typed_file(File, Info) -> + io:format(" Processing file: ~p\n", [File]), + Dir = filename:dirname(File), + RootName = filename:basename(filename:rootname(File)), + Ext = filename:extension(File), + TyperAnnDir = filename:join(Dir, ?TYPER_ANN_DIR), + TmpNewFilename = lists:concat([RootName, ".ann", Ext]), + NewFileName = filename:join(TyperAnnDir, TmpNewFilename), + case file:make_dir(TyperAnnDir) of + {error, Reason} -> + case Reason of + eexist -> %% TypEr dir exists; remove old typer files if they exist + case file:delete(NewFileName) of + ok -> ok; + {error, enoent} -> ok; + {error, _} -> + Msg = io_lib:format("Error in deleting file ~s\n", [NewFileName]), + fatal_error(Msg) + end, + write_typed_file(File, Info, NewFileName); + enospc -> + Msg = io_lib:format("Not enough space in ~p\n", [Dir]), + fatal_error(Msg); + eacces -> + Msg = io_lib:format("No write permission in ~p\n", [Dir]), + fatal_error(Msg); + _ -> + Msg = io_lib:format("Unhandled error ~s when writing ~p\n", + [Reason, Dir]), + fatal_error(Msg) + end; + ok -> %% Typer dir does NOT exist + write_typed_file(File, Info, NewFileName) + end. + +write_typed_file(File, Info, NewFileName) -> + {ok, Binary} = file:read_file(File), + Chars = binary_to_list(Binary), + write_typed_file(Chars, NewFileName, Info, 1, []), + io:format(" Saved as: ~p\n", [NewFileName]). + +write_typed_file(Chars, File, #info{functions = []}, _LNo, _Acc) -> + ok = file:write_file(File, list_to_binary(Chars), [append]); +write_typed_file([Ch|Chs] = Chars, File, Info, LineNo, Acc) -> + [{Line,F,A}|RestFuncs] = Info#info.functions, + case Line of + 1 -> %% This will happen only for inc files + ok = raw_write(F, A, Info, File, []), + NewInfo = Info#info{functions = RestFuncs}, + NewAcc = [], + write_typed_file(Chars, File, NewInfo, Line, NewAcc); + _ -> + case Ch of + 10 -> + NewLineNo = LineNo + 1, + {NewInfo, NewAcc} = + case NewLineNo of + Line -> + ok = raw_write(F, A, Info, File, [Ch|Acc]), + {Info#info{functions = RestFuncs}, []}; + _ -> + {Info, [Ch|Acc]} + end, + write_typed_file(Chs, File, NewInfo, NewLineNo, NewAcc); + _ -> + write_typed_file(Chs, File, Info, LineNo, [Ch|Acc]) + end + end. + +raw_write(F, A, Info, File, Content) -> + TypeInfo = get_type_string(F, A, Info, file), + ContentList = lists:reverse(Content) ++ TypeInfo ++ "\n", + ContentBin = list_to_binary(ContentList), + file:write_file(File, ContentBin, [append]). + +get_type_string(F, A, Info, Mode) -> + Type = get_type_info({F,A}, Info#info.types), + TypeStr = + case Type of + {contract, C} -> + dialyzer_contracts:contract_to_string(C); + {RetType, ArgType} -> + Sig = erl_types:t_fun(ArgType, RetType), + dialyzer_utils:format_sig(Sig, Info#info.records) + end, + case Info#info.edoc of + false -> + case {Mode, Type} of + {file, {contract, _}} -> ""; + _ -> + Prefix = lists:concat(["-spec ", erl_types:atom_to_string(F)]), + lists:concat([Prefix, TypeStr, "."]) + end; + true -> + Prefix = lists:concat(["%% @spec ", F]), + lists:concat([Prefix, TypeStr, "."]) + end. + +show_type_info(File, Info) -> + io:format("\n%% File: ~p\n%% ", [File]), + OutputString = lists:concat(["~.", length(File)+8, "c~n"]), + io:fwrite(OutputString, [$-]), + Fun = fun ({_LineNo, F, A}) -> + TypeInfo = get_type_string(F, A, Info, show), + io:format("~s\n", [TypeInfo]) + end, + lists:foreach(Fun, Info#info.functions). + +get_type_info(Func, Types) -> + case map__lookup(Func, Types) of + none -> + %% Note: Typeinfo of any function should exist in + %% the result offered by dialyzer, otherwise there + %% *must* be something wrong with the analysis + Msg = io_lib:format("No type info for function: ~p\n", [Func]), + fatal_error(Msg); + {contract, _Fun} = C -> C; + {_RetType, _ArgType} = RA -> RA + end. + +%%-------------------------------------------------------------------- +%% Processing of command-line options and arguments. +%%-------------------------------------------------------------------- + +-spec process_cl_args() -> {args(), analysis()}. + +process_cl_args() -> + ArgList = init:get_plain_arguments(), + %% io:format("Args is ~p\n", [ArgList]), + {Args, Analysis} = analyze_args(ArgList, #args{}, #analysis{}), + %% if the mode has not been set, set it to the default mode (show) + {Args, case Analysis#analysis.mode of + undefined -> Analysis#analysis{mode = ?SHOW}; + Mode when is_atom(Mode) -> Analysis + end}. + +analyze_args([], Args, Analysis) -> + {Args, Analysis}; +analyze_args(ArgList, Args, Analysis) -> + {Result, Rest} = cl(ArgList), + {NewArgs, NewAnalysis} = analyze_result(Result, Args, Analysis), + analyze_args(Rest, NewArgs, NewAnalysis). + +cl(["-h"|_]) -> help_message(); +cl(["--help"|_]) -> help_message(); +cl(["-v"|_]) -> version_message(); +cl(["--version"|_]) -> version_message(); +cl(["--edoc"|Opts]) -> {edoc, Opts}; +cl(["--show"|Opts]) -> {{mode, ?SHOW}, Opts}; +cl(["--show_exported"|Opts]) -> {{mode, ?SHOW_EXPORTED}, Opts}; +cl(["--show-exported"|Opts]) -> {{mode, ?SHOW_EXPORTED}, Opts}; +cl(["--show_success_typings"|Opts]) -> {show_succ, Opts}; +cl(["--show-success-typings"|Opts]) -> {show_succ, Opts}; +cl(["--annotate"|Opts]) -> {{mode, ?ANNOTATE}, Opts}; +cl(["--annotate-inc-files"|Opts]) -> {{mode, ?ANNOTATE_INC_FILES}, Opts}; +cl(["--no_spec"|Opts]) -> {no_spec, Opts}; +cl(["--plt",Plt|Opts]) -> {{plt, Plt}, Opts}; +cl(["-D"++Def|Opts]) -> + case Def of + "" -> fatal_error("no variable name specified after -D"); + _ -> + DefPair = process_def_list(re:split(Def, "=", [{return, list}])), + {{def, DefPair}, Opts} + end; +cl(["-I",Dir|Opts]) -> {{inc, Dir}, Opts}; +cl(["-I"++Dir|Opts]) -> + case Dir of + "" -> fatal_error("no include directory specified after -I"); + _ -> {{inc, Dir}, Opts} + end; +cl(["-T"|Opts]) -> + {Files, RestOpts} = dialyzer_cl_parse:collect_args(Opts), + case Files of + [] -> fatal_error("no file or directory specified after -T"); + [_|_] -> {{trusted, Files}, RestOpts} + end; +cl(["-r"|Opts]) -> + {Files, RestOpts} = dialyzer_cl_parse:collect_args(Opts), + {{files_r, Files}, RestOpts}; +cl(["-pa",Dir|Opts]) -> {{pa,Dir}, Opts}; +cl(["-pz",Dir|Opts]) -> {{pz,Dir}, Opts}; +cl(["-"++H|_]) -> fatal_error("unknown option -"++H); +cl(Opts) -> + {Files, RestOpts} = dialyzer_cl_parse:collect_args(Opts), + {{files, Files}, RestOpts}. + +process_def_list(L) -> + case L of + [Name, Value] -> + {ok, Tokens, _} = erl_scan:string(Value ++ "."), + {ok, ErlValue} = erl_parse:parse_term(Tokens), + {list_to_atom(Name), ErlValue}; + [Name] -> + {list_to_atom(Name), true} + end. + +%% Get information about files that the user trusts and wants to analyze +analyze_result({files, Val}, Args, Analysis) -> + NewVal = Args#args.files ++ Val, + {Args#args{files = NewVal}, Analysis}; +analyze_result({files_r, Val}, Args, Analysis) -> + NewVal = Args#args.files_r ++ Val, + {Args#args{files_r = NewVal}, Analysis}; +analyze_result({trusted, Val}, Args, Analysis) -> + NewVal = Args#args.trusted ++ Val, + {Args#args{trusted = NewVal}, Analysis}; +analyze_result(edoc, Args, Analysis) -> + {Args, Analysis#analysis{edoc = true}}; +%% Get useful information for actual analysis +analyze_result({mode, Mode}, Args, Analysis) -> + case Analysis#analysis.mode of + undefined -> {Args, Analysis#analysis{mode = Mode}}; + OldMode -> mode_error(OldMode, Mode) + end; +analyze_result({def, Val}, Args, Analysis) -> + NewVal = Analysis#analysis.macros ++ [Val], + {Args, Analysis#analysis{macros = NewVal}}; +analyze_result({inc, Val}, Args, Analysis) -> + NewVal = Analysis#analysis.includes ++ [Val], + {Args, Analysis#analysis{includes = NewVal}}; +analyze_result({plt, Plt}, Args, Analysis) -> + {Args, Analysis#analysis{plt = Plt}}; +analyze_result(show_succ, Args, Analysis) -> + {Args, Analysis#analysis{show_succ = true}}; +analyze_result(no_spec, Args, Analysis) -> + {Args, Analysis#analysis{no_spec = true}}; +analyze_result({pa, Dir}, Args, Analysis) -> + true = code:add_patha(Dir), + {Args, Analysis}; +analyze_result({pz, Dir}, Args, Analysis) -> + true = code:add_pathz(Dir), + {Args, Analysis}. + +%%-------------------------------------------------------------------- +%% File processing. +%%-------------------------------------------------------------------- + +-spec get_all_files(args()) -> [file:filename(),...]. + +get_all_files(#args{files = Fs, files_r = Ds}) -> + case filter_fd(Fs, Ds, fun test_erl_file_exclude_ann/1) of + [] -> fatal_error("no file(s) to analyze"); + AllFiles -> AllFiles + end. + +-spec test_erl_file_exclude_ann(file:filename()) -> boolean(). + +test_erl_file_exclude_ann(File) -> + case is_erl_file(File) of + true -> %% Exclude files ending with ".ann.erl" + case re:run(File, "[\.]ann[\.]erl$") of + {match, _} -> false; + nomatch -> true + end; + false -> false + end. + +-spec is_erl_file(file:filename()) -> boolean(). + +is_erl_file(File) -> + filename:extension(File) =:= ".erl". + +-type test_file_fun() :: fun((file:filename()) -> boolean()). + +-spec filter_fd(files(), files(), test_file_fun()) -> files(). + +filter_fd(File_Dir, Dir_R, Fun) -> + All_File_1 = process_file_and_dir(File_Dir, Fun), + All_File_2 = process_dir_rec(Dir_R, Fun), + remove_dup(All_File_1 ++ All_File_2). + +-spec process_file_and_dir(files(), test_file_fun()) -> files(). + +process_file_and_dir(File_Dir, TestFun) -> + Fun = + fun (Elem, Acc) -> + case filelib:is_regular(Elem) of + true -> process_file(Elem, TestFun, Acc); + false -> check_dir(Elem, false, Acc, TestFun) + end + end, + lists:foldl(Fun, [], File_Dir). + +-spec process_dir_rec(files(), test_file_fun()) -> files(). + +process_dir_rec(Dirs, TestFun) -> + Fun = fun (Dir, Acc) -> check_dir(Dir, true, Acc, TestFun) end, + lists:foldl(Fun, [], Dirs). + +-spec check_dir(file:filename(), boolean(), files(), test_file_fun()) -> files(). + +check_dir(Dir, Recursive, Acc, Fun) -> + case file:list_dir(Dir) of + {ok, Files} -> + {TmpDirs, TmpFiles} = split_dirs_and_files(Files, Dir), + case Recursive of + false -> + FinalFiles = process_file_and_dir(TmpFiles, Fun), + Acc ++ FinalFiles; + true -> + TmpAcc1 = process_file_and_dir(TmpFiles, Fun), + TmpAcc2 = process_dir_rec(TmpDirs, Fun), + Acc ++ TmpAcc1 ++ TmpAcc2 + end; + {error, eacces} -> + fatal_error("no access permission to dir \""++Dir++"\""); + {error, enoent} -> + fatal_error("cannot access "++Dir++": No such file or directory"); + {error, _Reason} -> + fatal_error("error involving a use of file:list_dir/1") + end. + +%% Same order as the input list +-spec process_file(file:filename(), test_file_fun(), files()) -> files(). + +process_file(File, TestFun, Acc) -> + case TestFun(File) of + true -> Acc ++ [File]; + false -> Acc + end. + +%% Same order as the input list +-spec split_dirs_and_files(files(), file:filename()) -> {files(), files()}. + +split_dirs_and_files(Elems, Dir) -> + Test_Fun = + fun (Elem, {DirAcc, FileAcc}) -> + File = filename:join(Dir, Elem), + case filelib:is_regular(File) of + false -> {[File|DirAcc], FileAcc}; + true -> {DirAcc, [File|FileAcc]} + end + end, + {Dirs, Files} = lists:foldl(Test_Fun, {[], []}, Elems), + {lists:reverse(Dirs), lists:reverse(Files)}. + +%% Removes duplicate filenames but keeps the order of the input list +-spec remove_dup(files()) -> files(). + +remove_dup(Files) -> + Test_Dup = fun (File, Acc) -> + case lists:member(File, Acc) of + true -> Acc; + false -> [File|Acc] + end + end, + Reversed_Elems = lists:foldl(Test_Dup, [], Files), + lists:reverse(Reversed_Elems). + +%%-------------------------------------------------------------------- +%% Collect information. +%%-------------------------------------------------------------------- + +-type inc_file_info() :: {file:filename(), func_info()}. + +-record(tmpAcc, {file :: file:filename(), + module :: atom(), + funcAcc = [] :: [func_info()], + incFuncAcc = [] :: [inc_file_info()], + dialyzerObj = [] :: [{mfa(), {_, _}}]}). + +-spec collect_info(analysis()) -> analysis(). + +collect_info(Analysis) -> + NewPlt = + try get_dialyzer_plt(Analysis) of + DialyzerPlt -> + dialyzer_plt:merge_plts([Analysis#analysis.trust_plt, DialyzerPlt]) + catch + throw:{dialyzer_error,_Reason} -> + fatal_error("Dialyzer's PLT is missing or is not up-to-date; please (re)create it") + end, + NewAnalysis = lists:foldl(fun collect_one_file_info/2, + Analysis#analysis{trust_plt = NewPlt}, + Analysis#analysis.files), + %% Process Remote Types + TmpCServer = NewAnalysis#analysis.codeserver, + NewCServer = + try + TmpCServer1 = dialyzer_utils:merge_types(TmpCServer, NewPlt), + NewExpTypes = dialyzer_codeserver:get_temp_exported_types(TmpCServer), + OldExpTypes = dialyzer_plt:get_exported_types(NewPlt), + MergedExpTypes = sets:union(NewExpTypes, OldExpTypes), + TmpCServer2 = + dialyzer_codeserver:finalize_exported_types(MergedExpTypes, TmpCServer1), + TmpCServer3 = dialyzer_utils:process_record_remote_types(TmpCServer2), + dialyzer_contracts:process_contract_remote_types(TmpCServer3) + catch + throw:{error, ErrorMsg} -> + fatal_error(ErrorMsg) + end, + NewAnalysis#analysis{codeserver = NewCServer}. + +collect_one_file_info(File, Analysis) -> + Ds = [{d,Name,Val} || {Name,Val} <- Analysis#analysis.macros], + %% Current directory should also be included in "Includes". + Includes = [filename:dirname(File)|Analysis#analysis.includes], + Is = [{i,Dir} || Dir <- Includes], + Options = dialyzer_utils:src_compiler_opts() ++ Is ++ Ds, + case dialyzer_utils:get_abstract_code_from_src(File, Options) of + {error, Reason} -> + %% io:format("File=~p\n,Options=~p\n,Error=~p\n", [File,Options,Reason]), + compile_error(Reason); + {ok, AbstractCode} -> + case dialyzer_utils:get_core_from_abstract_code(AbstractCode, Options) of + error -> compile_error(["Could not get core erlang for "++File]); + {ok, Core} -> + case dialyzer_utils:get_record_and_type_info(AbstractCode) of + {error, Reason} -> compile_error([Reason]); + {ok, Records} -> + Mod = cerl:concrete(cerl:module_name(Core)), + case dialyzer_utils:get_spec_info(Mod, AbstractCode, Records) of + {error, Reason} -> compile_error([Reason]); + {ok, SpecInfo, CbInfo} -> + ExpTypes = get_exported_types_from_core(Core), + analyze_core_tree(Core, Records, SpecInfo, CbInfo, + ExpTypes, Analysis, File) + end + end + end + end. + +analyze_core_tree(Core, Records, SpecInfo, CbInfo, ExpTypes, Analysis, File) -> + Module = cerl:concrete(cerl:module_name(Core)), + TmpTree = cerl:from_records(Core), + CS1 = Analysis#analysis.codeserver, + NextLabel = dialyzer_codeserver:get_next_core_label(CS1), + {Tree, NewLabel} = cerl_trees:label(TmpTree, NextLabel), + CS2 = dialyzer_codeserver:insert(Module, Tree, CS1), + CS3 = dialyzer_codeserver:set_next_core_label(NewLabel, CS2), + CS4 = dialyzer_codeserver:store_temp_records(Module, Records, CS3), + CS5 = + case Analysis#analysis.no_spec of + true -> CS4; + false -> + dialyzer_codeserver:store_temp_contracts(Module, SpecInfo, CbInfo, CS4) + end, + OldExpTypes = dialyzer_codeserver:get_temp_exported_types(CS5), + MergedExpTypes = sets:union(ExpTypes, OldExpTypes), + CS6 = dialyzer_codeserver:insert_temp_exported_types(MergedExpTypes, CS5), + Ex_Funcs = [{0,F,A} || {_,_,{F,A}} <- cerl:module_exports(Tree)], + CG = Analysis#analysis.callgraph, + {V, E} = dialyzer_callgraph:scan_core_tree(Tree, CG), + dialyzer_callgraph:add_edges(E, V, CG), + Fun = fun analyze_one_function/2, + All_Defs = cerl:module_defs(Tree), + Acc = lists:foldl(Fun, #tmpAcc{file = File, module = Module}, All_Defs), + Exported_FuncMap = map__insert({File, Ex_Funcs}, Analysis#analysis.ex_func), + %% we must sort all functions in the file which + %% originate from this file by *numerical order* of lineNo + Sorted_Functions = lists:keysort(1, Acc#tmpAcc.funcAcc), + FuncMap = map__insert({File, Sorted_Functions}, Analysis#analysis.func), + %% we do not need to sort functions which are imported from included files + IncFuncMap = map__insert({File, Acc#tmpAcc.incFuncAcc}, + Analysis#analysis.inc_func), + FMs = Analysis#analysis.fms ++ [{File, Module}], + RecordMap = map__insert({File, Records}, Analysis#analysis.record), + Analysis#analysis{fms = FMs, + callgraph = CG, + codeserver = CS6, + ex_func = Exported_FuncMap, + inc_func = IncFuncMap, + record = RecordMap, + func = FuncMap}. + +analyze_one_function({Var, FunBody} = Function, Acc) -> + F = cerl:fname_id(Var), + A = cerl:fname_arity(Var), + TmpDialyzerObj = {{Acc#tmpAcc.module, F, A}, Function}, + NewDialyzerObj = Acc#tmpAcc.dialyzerObj ++ [TmpDialyzerObj], + Anno = cerl:get_ann(FunBody), + LineNo = get_line(Anno), + FileName = get_file(Anno), + BaseName = filename:basename(FileName), + FuncInfo = {LineNo, F, A}, + OriginalName = Acc#tmpAcc.file, + {FuncAcc, IncFuncAcc} = + case (FileName =:= OriginalName) orelse (BaseName =:= OriginalName) of + true -> %% Coming from original file + %% io:format("Added function ~p\n", [{LineNo, F, A}]), + {Acc#tmpAcc.funcAcc ++ [FuncInfo], Acc#tmpAcc.incFuncAcc}; + false -> + %% Coming from other sourses, including: + %% -- .yrl (yecc-generated file) + %% -- yeccpre.hrl (yecc-generated file) + %% -- other cases + {Acc#tmpAcc.funcAcc, Acc#tmpAcc.incFuncAcc ++ [{FileName, FuncInfo}]} + end, + Acc#tmpAcc{funcAcc = FuncAcc, + incFuncAcc = IncFuncAcc, + dialyzerObj = NewDialyzerObj}. + +get_line([Line|_]) when is_integer(Line) -> Line; +get_line([_|T]) -> get_line(T); +get_line([]) -> none. + +get_file([{file,File}|_]) -> File; +get_file([_|T]) -> get_file(T); +get_file([]) -> "no_file". % should not happen + +-spec get_dialyzer_plt(analysis()) -> plt(). + +get_dialyzer_plt(#analysis{plt = PltFile0}) -> + PltFile = + case PltFile0 =:= none of + true -> dialyzer_plt:get_default_plt(); + false -> PltFile0 + end, + dialyzer_plt:from_file(PltFile). + +%% Exported Types + +get_exported_types_from_core(Core) -> + Attrs = cerl:module_attrs(Core), + ExpTypes1 = [cerl:concrete(L2) || {L1, L2} <- Attrs, + cerl:is_literal(L1), + cerl:is_literal(L2), + cerl:concrete(L1) =:= 'export_type'], + ExpTypes2 = lists:flatten(ExpTypes1), + M = cerl:atom_val(cerl:module_name(Core)), + sets:from_list([{M, F, A} || {F, A} <- ExpTypes2]). + +%%-------------------------------------------------------------------- +%% Utilities for error reporting. +%%-------------------------------------------------------------------- + +-spec fatal_error(string()) -> no_return(). + +fatal_error(Slogan) -> + msg(io_lib:format("typer: ~s\n", [Slogan])), + erlang:halt(1). + +-spec mode_error(mode(), mode()) -> no_return(). + +mode_error(OldMode, NewMode) -> + Msg = io_lib:format("Mode was previously set to '~s'; " + "can not set it to '~s' now", + [OldMode, NewMode]), + fatal_error(Msg). + +-spec compile_error([string()]) -> no_return(). + +compile_error(Reason) -> + JoinedString = lists:flatten([X ++ "\n" || X <- Reason]), + Msg = "Analysis failed with error report:\n" ++ JoinedString, + fatal_error(Msg). + +-spec msg(string()) -> 'ok'. + +msg(Msg) -> + io:format(standard_error, "~s", [Msg]). + +%%-------------------------------------------------------------------- +%% Version and help messages. +%%-------------------------------------------------------------------- + +-spec version_message() -> no_return(). + +version_message() -> + io:format("TypEr version "++?VSN++"\n"), + erlang:halt(0). + +-spec help_message() -> no_return(). + +help_message() -> + S = <<" Usage: typer [--help] [--version] [--plt PLT] [--edoc] + [--show | --show-exported | --annotate | --annotate-inc-files] + [-Ddefine]* [-I include_dir]* [-pa dir]* [-pz dir]* + [-T application]* [-r] file* + + Options: + -r dir* + search directories recursively for .erl files below them + --show + Prints type specifications for all functions on stdout. + (this is the default behaviour; this option is not really needed) + --show-exported (or --show_exported) + Same as --show, but prints specifications for exported functions only + Specs are displayed sorted alphabetically on the function's name + --annotate + Annotates the specified files with type specifications + --annotate-inc-files + Same as --annotate but annotates all -include() files as well as + all .erl files (use this option with caution - has not been tested much) + --edoc + Prints type information as Edoc @spec comments, not as type specs + --plt PLT + Use the specified dialyzer PLT file rather than the default one + -T file* + The specified file(s) already contain type specifications and these + are to be trusted in order to print specs for the rest of the files + (Multiple files or dirs, separated by spaces, can be specified.) + -Dname (or -Dname=value) + pass the defined name(s) to TypEr + (The syntax of defines is the same as that used by \"erlc\".) + -I include_dir + pass the include_dir to TypEr + (The syntax of includes is the same as that used by \"erlc\".) + -pa dir + -pz dir + Set code path options to TypEr + (This is useful for files that use parse tranforms.) + --version (or -v) + prints the Typer version and exits + --help (or -h) + prints this message and exits + + Note: + * denotes that multiple occurrences of these options are possible. +">>, + io:put_chars(S), + erlang:halt(0). + +%%-------------------------------------------------------------------- +%% Handle messages. +%%-------------------------------------------------------------------- + +rcv_ext_types() -> + Self = self(), + Self ! {Self, done}, + rcv_ext_types(Self, []). + +rcv_ext_types(Self, ExtTypes) -> + receive + {Self, ext_types, ExtType} -> + rcv_ext_types(Self, [ExtType|ExtTypes]); + {Self, done} -> + lists:usort(ExtTypes) + end. + +%%-------------------------------------------------------------------- +%% A convenient abstraction of a Key-Value mapping data structure +%% specialized for the uses in this module +%%-------------------------------------------------------------------- + +-type map_dict() :: dict:dict(). + +-spec map__new() -> map_dict(). +map__new() -> + dict:new(). + +-spec map__insert({term(), term()}, map_dict()) -> map_dict(). +map__insert(Object, Map) -> + {Key, Value} = Object, + dict:store(Key, Value, Map). + +-spec map__lookup(term(), map_dict()) -> term(). +map__lookup(Key, Map) -> + try dict:fetch(Key, Map) catch error:_ -> none end. + +-spec map__from_list([{fa(), term()}]) -> map_dict(). +map__from_list(List) -> + dict:from_list(List). + +-spec map__remove(term(), map_dict()) -> map_dict(). +map__remove(Key, Dict) -> + dict:erase(Key, Dict). + +-spec map__fold(fun((term(), term(), term()) -> map_dict()), map_dict(), map_dict()) -> map_dict(). +map__fold(Fun, Acc0, Dict) -> + dict:fold(Fun, Acc0, Dict). -- cgit v1.2.3