Enforce LWG DR 2566 requirement for container adaptors
Although there is no good use for stack<int, deque<double>> or similar types with a mismatched value_type, it's possible somebody is doing that and getting away with it currently. This patch only enforces the new requirement for C++17 and later. During stage 1 we should consider enforcing it for C++11 and C++14. * doc/xml/manual/intro.xml: Document LWG 2566 status. * include/bits/stl_queue.h (queue, priority_queue): Add static assertions to enforce LWG 2566 requirement on value_type. * include/bits/stl_stack.h (stack): Likewise. From-SVN: r268877
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2019-02-14 Jonathan Wakely <jwakely@redhat.com>
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* doc/xml/manual/intro.xml: Document LWG 2566 status.
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* include/bits/stl_queue.h (queue, priority_queue): Add static
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assertions to enforce LWG 2566 requirement on value_type.
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* include/bits/stl_stack.h (stack): Likewise.
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PR middle-end/89303
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* testsuite/20_util/enable_shared_from_this/89303.cc: New test.
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@ -1120,11 +1120,18 @@ requirements of the license of GCC.
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ill-formed.
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</para></listitem></varlistentry>
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<varlistentry xml:id="manual.bugs.dr2537"><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="&DR;#2537">2537</link>:
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<emphasis>Requirements on the first template parameter of container adaptors
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</emphasis>
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</term>
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<listitem><para>Add static assertions to enforce the requirement.
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</para></listitem></varlistentry>
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<varlistentry xml:id="manual.bugs.dr2583"><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="&DR;#2583">2583</link>:
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<emphasis>There is no way to supply an allocator for <code>basic_string(str, pos)</code>
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</emphasis>
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</term>
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<listitem><para>Add new constructor
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<listitem><para>Add new constructor.
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</para></listitem></varlistentry>
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<varlistentry xml:id="manual.bugs.dr2684"><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="&DR;#2684">2684</link>:
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@ -118,7 +118,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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template<typename _Alloc>
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using _Uses = typename
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enable_if<uses_allocator<_Sequence, _Alloc>::value>::type;
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#endif
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#if __cplusplus >= 201703L
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 2566. Requirements on the first template parameter of container
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// adaptors
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static_assert(is_same<_Tp, typename _Sequence::value_type>::value,
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"value_type must be the same as the underlying container");
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#endif // C++17
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#endif // C++11
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public:
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typedef typename _Sequence::value_type value_type;
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@ -451,7 +459,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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template<typename _Alloc>
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using _Uses = typename
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enable_if<uses_allocator<_Sequence, _Alloc>::value>::type;
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#endif
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#if __cplusplus >= 201703L
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 2566. Requirements on the first template parameter of container
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// adaptors
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static_assert(is_same<_Tp, typename _Sequence::value_type>::value,
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"value_type must be the same as the underlying container");
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#endif // C++17
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#endif // C++11
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public:
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typedef typename _Sequence::value_type value_type;
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@ -120,7 +120,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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template<typename _Alloc>
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using _Uses = typename
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enable_if<uses_allocator<_Sequence, _Alloc>::value>::type;
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#endif
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#if __cplusplus >= 201703L
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 2566. Requirements on the first template parameter of container
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// adaptors
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static_assert(is_same<_Tp, typename _Sequence::value_type>::value,
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"value_type must be the same as the underlying container");
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#endif // C++17
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#endif // C++11
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public:
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typedef typename _Sequence::value_type value_type;
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