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authorErlang/OTP <[email protected]>2016-06-21 15:12:41 +0200
committerErlang/OTP <[email protected]>2016-06-21 15:12:41 +0200
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<p>This document describes the changes made to the Compiler
application.</p>
+<section><title>Compiler 7.0</title>
+
+ <section><title>Fixed Bugs and Malfunctions</title>
+ <list>
+ <item>
+ <p><c>compile:forms/1,2</c> would crash when used in a
+ working directory that had been deleted by another
+ process.</p>
+ <p>
+ Own Id: OTP-13430 Aux Id: ERL-113 </p>
+ </item>
+ <item>
+ <p>Dialyzer no longer crashes when there is an invalid
+ function call such as <c>42(7)</c> in a module being
+ analyzed. The compiler will now warn for invalid function
+ calls such as <c>X = 42, x(7)</c>.</p>
+ <p>
+ Own Id: OTP-13552 Aux Id: ERL-138 </p>
+ </item>
+ </list>
+ </section>
+
+
+ <section><title>Improvements and New Features</title>
+ <list>
+ <item>
+ <p>
+ Optimization of tuple matching has been slightly
+ improved.</p>
+ <p>
+ Own Id: OTP-12951</p>
+ </item>
+ <item>
+ <p>Five deprecated and undocumented functions in the
+ module <c>core_lib</c> have been removed. The functions
+ are: <c>get_anno/{1,2}</c>, <c>is_literal/1</c>,
+ <c>is_literal_list/1</c>, and <c>literal_value</c>. Use
+ the appropriate functions in the <c>cerl</c> module
+ instead.</p>
+ <p>
+ Own Id: OTP-12979</p>
+ </item>
+ <item>
+ <p>The pre-processor can now expand the ?FUNCTION_NAME
+ and ?FUNCTION_ARITY macros.</p>
+ <p>
+ Own Id: OTP-13059</p>
+ </item>
+ <item>
+ <p>The function mapfold/4 has been added to the
+ <c>cerl_trees</c> module.</p>
+ <p>
+ Own Id: OTP-13280</p>
+ </item>
+ <item>
+ <p>Bitstring comprehensions have been generalized to
+ allow arbitrary expressions in the construction part.</p>
+ <p>
+ Own Id: OTP-13289</p>
+ </item>
+ <item>
+ <p>The compiler will now produce warnings for binary
+ patterns that will never match (example:
+ <c>&lt;&lt;-1/unsigned&gt;&gt; = Bin</c>). </p>
+ <p>
+ Own Id: OTP-13374 Aux Id: ERL-44 </p>
+ </item>
+ <item>
+ <p>The compiler will no longer put the compilation date
+ and time into BEAM files. That means that two BEAM files
+ compiled on the same computer from the same source code
+ and compilation options will be identical.</p>
+ <p>Note: If you want to find out whether a BEAM file on
+ disk is different from the loaded code, compared the MD5
+ value obtained from <c>Mod:module_info(md5)</c> with the
+ MD5 value obtained from
+ <c>beam_lib:md5(BeamFileForMod)</c></p>.
+ <p>
+ *** POTENTIAL INCOMPATIBILITY ***</p>
+ <p>
+ Own Id: OTP-13504</p>
+ </item>
+ <item>
+ <p>The function <c>compile:env_compiler_options/0</c> has
+ been added to allow tools to pick up the same default
+ compiler options as the compiler itself.</p>
+ <p>
+ Own Id: OTP-13654</p>
+ </item>
+ </list>
+ </section>
+
+</section>
+
<section><title>Compiler 6.0.3</title>
<section><title>Fixed Bugs and Malfunctions</title>