diff options
| author | Jonathan Wakely <jwakely@redhat.com> | 2023-05-15 21:41:56 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2023-06-23 14:01:06 +0100 |
| commit | 291df257830e4ff877c716cfe6430c03677d9606 (patch) | |
| tree | 49ddef82f51c6db969eb957fa012493010e0a605 | |
| parent | b272bc0fbf84454cae8c02e7404cfb23641380cd (diff) | |
libstdc++: Document removal of implicit allocator rebinding extensions
Traditionally libstdc++ allowed containers to be
instantiated with allocator's that have the wrong value type, implicitly
rebinding the allocator to the container's value type. Since C++20 that
has been explicitly ill-formed, so the extension is no longer supported
in strict modes (e.g. -std=c++17) and in C++20 and later.
libstdc++-v3/ChangeLog:
* doc/xml/manual/evolution.xml: Document removal of implicit
allocator rebinding extensions in strict mode and for C++20.
* doc/html/*: Regenerate.
(cherry picked from commit 8cbaf679a3c1875c5475bd1cb0fb86fb9d03b2d4)
| -rw-r--r-- | libstdc++-v3/doc/html/manual/api.html | 9 | ||||
| -rw-r--r-- | libstdc++-v3/doc/xml/manual/evolution.xml | 13 |
2 files changed, 22 insertions, 0 deletions
diff --git a/libstdc++-v3/doc/html/manual/api.html b/libstdc++-v3/doc/html/manual/api.html index 359dcc4f213..8f0b17e858a 100644 --- a/libstdc++-v3/doc/html/manual/api.html +++ b/libstdc++-v3/doc/html/manual/api.html @@ -368,6 +368,11 @@ now defaults to zero. For the non-default <code class="option">--enable-symvers=gnu-versioned-namespace</code> configuration, the shared library SONAME has been changed to <code class="filename">libstdc++.so.8</code>. +</p><p> + The extension allowing containers to be instantiated with an allocator + that doesn't match the container's value type is no longer allowed in + strict (<code class="option">-std=c++NN</code>) modes, only in + <code class="option">-std=gnu++NN</code> modes. </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_91"></a><code class="constant">9</code></h3></div></div></div><p> C++17 header <code class="filename"><memory_resource></code> @@ -423,4 +428,8 @@ now defaults to zero. and <code class="filename"><stop_token></code> added. +</p><p> + The extension allowing containers to be instantiated with an allocator + that doesn't match the container's value type is no longer allowed in + C++20 mode, even in non-strict <code class="option">-std=gnu++20</code> mode. </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="abi.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="appendix_porting.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="backwards.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">ABI Policy and Guidelines </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Backwards Compatibility</td></tr></table></div></body></html>
\ No newline at end of file diff --git a/libstdc++-v3/doc/xml/manual/evolution.xml b/libstdc++-v3/doc/xml/manual/evolution.xml index 0394f7efb7b..f7bf8bb2b71 100644 --- a/libstdc++-v3/doc/xml/manual/evolution.xml +++ b/libstdc++-v3/doc/xml/manual/evolution.xml @@ -911,6 +911,13 @@ now defaults to zero. <filename>libstdc++.so.8</filename>. </para> +<para> + The extension allowing containers to be instantiated with an allocator + that doesn't match the container's value type is no longer allowed in + strict (<option>-std=c++NN</option>) modes, only in + <option>-std=gnu++NN</option> modes. +</para> + </section> <section xml:id="api.rel_91"><info><title><constant>9</constant></title></info> @@ -994,6 +1001,12 @@ now defaults to zero. added. </para> +<para> + The extension allowing containers to be instantiated with an allocator + that doesn't match the container's value type is no longer allowed in + C++20 mode, even in non-strict <option>-std=gnu++20</option> mode. +</para> + </section> </section> |