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PR libstdc++/88338 Implement P0898R3, C++20 concepts library

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The implementation is already complete but this updates the docs and
adds tests for the feature test macro.

	* doc/xml/manual/status_cxx2020.xml: Update status.
	* doc/html/*: Regenerate.
	* testsuite/std/concepts/1.cc: New test.
	* testsuite/std/concepts/2.cc: New test.

From-SVN: r277371
This commit is contained in:
Jonathan Wakely 2019-10-24 10:47:25 +01:00 committed by Jonathan Wakely
parent bbf0495dd2
commit 02819d3919
5 changed files with 64 additions and 5 deletions
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6
libstdc++-v3/ChangeLog
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@ -1,5 +1,11 @@
2019-10-24 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/88338 Implement P0898R3, C++20 concepts library
* doc/xml/manual/status_cxx2020.xml: Update status.
* doc/html/*: Regenerate.
* testsuite/std/concepts/1.cc: New test.
* testsuite/std/concepts/2.cc: New test.
* include/bits/random.h (uniform_random_bit_generator): Define for
C++20.
* testsuite/26_numerics/random/concept.cc: New test.

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libstdc++-v3/doc/html/manual/status.html
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@ -1214,11 +1214,11 @@ Feature-testing recommendations for C++</a>.
<a class="link" href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0892r2.html" target="_top">
P0892R2
</a>
</td><td align="center"> Note 1 </td><td align="left"> </td></tr><tr bgcolor="#C8B0B0"><td align="left"> Standard Library Concepts </td><td align="left">
</td><td align="center"> Note 1 </td><td align="left"> </td></tr><tr><td align="left"> Standard Library Concepts </td><td align="left">
<a class="link" href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0898r3.pdf" target="_top">
P0898R3
</a>
</td><td align="center"> </td><td align="left"> </td></tr><tr><td align="left"> Eradicating unnecessarily explicit default constructors from the standard library </td><td align="left">
</td><td align="center"> 10.1 </td><td align="left"> <code class="code">__cpp_lib_concepts &gt;= 201806L</code> </td></tr><tr><td align="left"> Eradicating unnecessarily explicit default constructors from the standard library </td><td align="left">
<a class="link" href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0935r0.html" target="_top">
P0935R0
</a>

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libstdc++-v3/doc/xml/manual/status_cxx2020.xml
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@ -535,15 +535,14 @@ Feature-testing recommendations for C++</link>.
</row>
<row>
<?dbhtml bgcolor="#C8B0B0" ?>
<entry> Standard Library Concepts </entry>
<entry>
<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0898r3.pdf">
P0898R3
</link>
</entry>
<entry align="center"> </entry>
<entry />
<entry align="center"> 10.1 </entry>
<entry> <code>__cpp_lib_concepts &gt;= 201806L</code> </entry>
</row>
<row>

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libstdc++-v3/testsuite/std/concepts/1.cc Normal file
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// Copyright (C) 2019 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-options "-std=gnu++2a" }
// { dg-do preprocess { target c++2a } }
#include <concepts>
#ifndef __cpp_lib_concepts
# error "Feature test macro for concepts is missing in <concepts>"
#elif __cpp_lib_concepts < 201806L
# error "Feature test macro for concepts has wrong value in <concepts>"
#endif

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libstdc++-v3/testsuite/std/concepts/2.cc Normal file
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// Copyright (C) 2019 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-options "-std=gnu++2a" }
// { dg-do preprocess { target c++2a } }
#include <version>
#ifndef __cpp_lib_concepts
# error "Feature test macro for concepts is missing in <version>"
#elif __cpp_lib_concepts < 201806L
# error "Feature test macro for concepts has wrong value in <version>"
#endif