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diff --git a/lib/compiler/doc/src/notes.xml b/lib/compiler/doc/src/notes.xml index 7ea000a895..740cbcf8eb 100644 --- a/lib/compiler/doc/src/notes.xml +++ b/lib/compiler/doc/src/notes.xml @@ -4,7 +4,7 @@ <chapter> <header> <copyright> - <year>2004</year><year>2010</year> + <year>2004</year><year>2011</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -31,6 +31,262 @@ <p>This document describes the changes made to the Compiler application.</p> +<section><title>Compiler 4.7.5</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Compiler options given in the source code using a + <c>-compile()</c> attribute used to be included twice in + <c>Mod:module_info(compile)</c>. They are now only + included once at the beginning of the list of options.</p> + <p> + Own Id: OTP-9534</p> + </item> + <item> + <p> + beam_disasm: Handle stripped BEAM files</p> + <p> + beam_disasm:file/1 would crash if asked to disassemble a + stripped BEAM file without an "Attr" chunk. (Thanks to + Haitao Li)</p> + <p> + Own Id: OTP-9571</p> + </item> + </list> + </section> + +</section> + +<section><title>Compiler 4.7.4</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + If a variable is matched out in binary matching and used + as the size for a binary element, it would seem to be + unbound if used in a subsequent match operation. (Thanks + to Bernard Duggan.)</p> + <p> + Own Id: OTP-9134</p> + </item> + <item> + <p>Eliminate incorrect warning in + <c>sys_core_fold</c></p> + <p> + Own Id: OTP-9152</p> + </item> + </list> + </section> + +</section> + +<section><title>Compiler 4.7.3</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + The <c>-export_type()</c> directive is no longer included + among the attributes.</p> + <p> + Own Id: OTP-8998</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + The maximum number of allowed arguments for an Erlang + function has been lowered from 256 to 255, so that the + number of arguments can now fit in a byte.</p> + <p> + Own Id: OTP-9049</p> + </item> + <item> + <p> + Dependency generation for Makefiles has been added to the + compiler and erlc. See the manual pages for + <c>compile</c> and <c>erlc</c>. (Thanks to Jean-Sebastien + Pedron.)</p> + <p> + Own Id: OTP-9065</p> + </item> + </list> + </section> + +</section> + +<section><title>Compiler 4.7.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Two compiler bugs (that would cause the compiler to + terminate) reported by Christopher Williams have been + fixed.</p> + <p> + Own Id: OTP-8949</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p>The compiler would translate binary comprehensions + containing tail segments in a way that would would + confuse Dialyzer. For instance:</p> + <p><c>[42 || <<_:8/integer, _/bits>> <= + Bits]</c></p> + <p> + would produce a Dialyzer warning.</p> + <p> + Own Id: OTP-8864</p> + </item> + <item> + <p> + Code such as <c>foo(A) -> <<A:0>></c> + would crash the compiler.</p> + <p> + Own Id: OTP-8865</p> + </item> + <item> + <p> + The compiler could fail with an internal error when + variables were exported from a receive block but the + return value of the receive block were not used. (Thanks + to Jim Engquist for reporting this error.)</p> + <p> + Own Id: OTP-8888</p> + </item> + </list> + </section> + +</section> + +<section><title>Compiler 4.7.1</title> + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + Eliminated warnings for auto-imported BIF clashes.</p> + <p> + Own Id: OTP-8840</p> + </item> + </list> + </section> + +</section> + +<section><title>Compiler 4.7</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Several problems in the inliner have been fixed.</p> + <p> + Own Id: OTP-8552</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + The module binary from EEP31 (and EEP9) is implemented.</p> + <p> + Own Id: OTP-8217</p> + </item> + <item> + <p>Local and imported functions now override the + auto-imported BIFs when the names clash. The pre R14 + behaviour was that auto-imported BIFs would override + local functions. To avoid that old programs change + behaviour, the following will generate an error:</p> + <list><item><p>Doing a call without explicit module name + to a local function having a name clashing with the name + of an auto-imported BIF that was present (and + auto-imported) before OTP R14A</p></item> + <item><p>Explicitly importing a function having a name + clashing with the name of an autoimported BIF that was + present (and autoimported) before OTP R14A</p></item> + <item><p>Using any form of the old compiler directive + <c>nowarn_bif_clash</c></p></item> </list> <p>If the BIF + was added or auto-imported in OTP R14A or later, + overriding it with an import or a local function will + only result in a warning,</p> <p>To resolve clashes, you + can either use the explicit module name <c>erlang</c> to + call the BIF, or you can remove the auto-import of that + specific BIF by using the new compiler directive + <c>-compile({no_auto_import,[F/A]}).</c>, which makes all + calls to the local or imported function without explicit + module name pass without warnings or errors.</p> <p>The + change makes it possible to add auto-imported BIFs + without breaking or silently changing old code in the + future. However some current code ingeniously utilizing + the old behaviour or the <c>nowarn_bif_clash</c> compiler + directive, might need changing to be accepted by the + compiler.</p> + <p> + *** POTENTIAL INCOMPATIBILITY ***</p> + <p> + Own Id: OTP-8579</p> + </item> + <item> + <p>The undocumented, unsupport, and deprecated function + <c>lists:flat_length/1</c> has been removed.</p> + <p> + Own Id: OTP-8584</p> + </item> + <item> + <p>Nested records can now be accessed without + parenthesis. See the Reference Manual for examples. + (Thanks to YAMASHINA Hio and Tuncer Ayaz.)</p> + <p> + Own Id: OTP-8597</p> + </item> + <item> + <p>It is now possible to suppress the warning in code + such as "<c>list_to_integer(S), ok</c>" by assigning the + ignored value "_" like this: "<c>_ = list_to_integer(S), + ok</c>".</p> + <p> + Own Id: OTP-8602</p> + </item> + <item> + <p><c>receive</c> statements that can only read out a + newly created reference are now specially optimized so + that it will execute in constant time regardless of the + number of messages in the receive queue for the process. + That optimization will benefit calls to + <c>gen_server:call()</c>. (See <c>gen:do_call/4</c> for + an example of a receive statement that will be + optimized.)</p> + <p> + Own Id: OTP-8623</p> + </item> + <item> + <p>The compiler optimizes record operations better.</p> + <p> + Own Id: OTP-8668</p> + </item> + </list> + </section> + +</section> + <section><title>Compiler 4.6.5</title> <section><title>Fixed Bugs and Malfunctions</title> |