W3 validated. Pushed.
commit 3c9e703a45f36113ace827463e6f0240fea334a2
Author: Marek Polacek <pola...@redhat.com>
Date: Tue Feb 4 17:20:18 2025 -0500
Document some further C++ FE changes.
diff --git a/htdocs/gcc-15/changes.html b/htdocs/gcc-15/changes.html
index 14dea6f4..18484915 100644
--- a/htdocs/gcc-15/changes.html
+++ b/htdocs/gcc-15/changes.html
@@ -246,14 +246,22 @@ asm (".text; %cc0: mov %cc2, %%r0; .previous;"
</li>
<li>Several C++ Defect Reports have been resolved, e.g.:
<ul>
+ <li><a href="https://wg21.link/cwg36";>DR 36</a>,
+ <em>using-declarations</em> in multiple-declaration contexts</li>
<li><a href="https://wg21.link/cwg882";>DR 882</a>,
Defining main as deleted</li>
+ <li><a href="https://wg21.link/cwg1363";>DR 1363</a>,
+ Triviality vs multiple default constructors</li>
+ <li><a href="https://wg21.link/cwg1496";>DR 1496</a>,
+ Triviality with deleted and missing default constructors</li>
<li><a href="https://wg21.link/cwg2387";>DR 2387</a>,
Linkage of const-qualified variable template</li>
<li><a href="https://wg21.link/cwg2521";>DR 2521</a>,
User-defined literals and reserved identifiers</li>
<li><a href="https://wg21.link/cwg2627";>DR 2627</a>,
Bit-fields and narrowing conversions</li>
+ <li><a href="https://wg21.link/cwg2819";>DR 2819</a>,
+ Cast from null pointer value in a constant expression (C++26 only)</li>
<li><a href="https://wg21.link/cwg2867";>DR 2867</a>,
Order of initialization for structured bindings</li>
<li><a href="https://wg21.link/cwg2918";>DR 2918</a>,
@@ -276,7 +284,76 @@ asm (".text; %cc0: mov %cc2, %%r0; .previous;"
delete. If a program overrides those replaceable global operators and
the replaced definitions read or modify global state visible to the
rest of the program, programs might need to be compiled with
- <code>-fno-assume-sane-operators-new-delete</code>.
+ <code>-fno-assume-sane-operators-new-delete</code>.</li>
+ <li>
+ <!-- commit r15-871-gefaaae49b307fc -->
+ The <a
href="https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wself-move";>
+ <code>-Wself-move</code></a> warning now warns even in a
+ member-initializer-list.
+ </li>
+ <li>
+ <!-- commit r15-1953-gf0fb6b6acd805c -->
+ The support for Concepts TS was removed. <code>-fconcepts-ts</code> has no
+ effect anymore.
+ </li>
+ <li>
+ <!-- commit r15-2774-g596d1ed9d40b10 -->
+ A new option
+ <a
href="https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Dialect-Options.html#index-Wtemplate-body";>
+ <code>-Wtemplate-body</code></a> was added, which can be used to disable
+ diagnosing errors when parsing a template.
+ </li>
+ <li>
+ C++ Modules have been greatly improved.
+ </li>
+ <li>
+ <!-- commit r15-3433-g3775f71c8909b3 -->
+ C++11 attributes are now supported even in C++98.
+ </li>
+ <li>
+ New
+ <a
href="https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-flag_005fenum-type-attribute";>
+ <code>flag_enum</code></a> attribute to indicate that the enumerators
+ are used in bitwise operations; this suppresses a <code>-Wswitch</code>
+ warning.
+ </li>
+ <li>
+ The <a
href="https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Dialect-Options.html#index-Wdangling-reference";>
+ <code>-Wdangling-reference</code></a> warning has been improved: for
+ example, it doesn't warn for empty classes anymore.
+ </li>
+ <li>
+ The front end's handling of explicitly-defaulted functions has been
+ corrected to properly handle <em>[dcl.fct.def.default]</em>. The
+ new
+ <a
href="https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Dialect-Options.html#index-Wdefaulted-function-deleted";>
+ <code>-Wdefaulted-function-deleted</code></a> warning warns when an
+ explicitly defaulted function is deleted.
+ </li>
+ <li>
+ The implementation of <a href="https://wg21.link/cwg2789";>DR 2789</a>
+ was refined.
+ </li>
+ <li>
+ <!-- commit r15-4050-g5dad738c1dd164 -->
+ Compilation time speed ups, e.g. by improving hashing of template
+ specializations.
+ </li>
+ <li>
+ <!-- commit r15-5109-g417b4cc9bf2180 -->
+ Support for <code>__builtin_operator_new</code> and
+ <code>__builtin_operator_delete</code> was added. See
+ <a href="https://gcc.gnu.org/onlinedocs/gcc/New_002fDelete-Builtins.html";>
+ the manual</a> for more info.
+ </li>
+ <li>
+ <!-- commit r15-6052-g12de1942a0a673 -->
+ More prvalues are evaluated at compile time
+ (<a
href="https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=12de1942a0a673f9f2f1c2bfce4279a666061ffc";>git</a>).
+ </li>
+ <li>
+ Various diagnostic improvements.
+ </li>
</ul>
<h4 id="libstdcxx">Runtime Library (libstdc++)</h4>
