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PR libstdc++/83538 fix std::match_results<T>::reference (LWG 2306)

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PR libstdc++/83538
	* doc/xml/manual/intro.xml: Document LWG 2306 change.
	* include/bits/regex.h (match_results::reference): Change to
	non-const reference.
	* testsuite/28_regex/match_results/typedefs.cc: Check types are
	correct.

From-SVN: r256012
This commit is contained in:
Jonathan Wakely 2017-12-27 19:43:33 +00:00 committed by Jonathan Wakely
parent aefd636b3c
commit c41743d0c0
4 changed files with 23 additions and 1 deletions
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9
libstdc++-v3/ChangeLog
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@ -1,3 +1,12 @@
2017-12-27 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/83538
* doc/xml/manual/intro.xml: Document LWG 2306 change.
* include/bits/regex.h (match_results::reference): Change to
non-const reference.
* testsuite/28_regex/match_results/typedefs.cc: Check types are
correct.
2017-12-24 Michele Pezzutti <mpezz@tiscali.it>
PR libstdc++/83237

6
libstdc++-v3/doc/xml/manual/intro.xml
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@ -968,6 +968,12 @@ requirements of the license of GCC.
<code>constexpr</code> to <code>addressof</code> for C++17 and later.
</para></listitem></varlistentry>
<varlistentry xml:id="manual.bugs.dr2306"><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="&DR;#2306">2306</link>:
<emphasis><code>match_results::reference</code> should be <code>value_type&amp;</code>, not <code>const value_type&amp;</code></emphasis>
</term>
<listitem><para>Change typedef.
</para></listitem></varlistentry>
<varlistentry xml:id="manual.bugs.dr2313"><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="&DR;#2313">2313</link>:
<emphasis><code>tuple_size</code> should always derive from <code>integral_constant&lt;size_t, N&gt;</code></emphasis>
</term>

2
libstdc++-v3/include/bits/regex.h
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@ -1541,7 +1541,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
//@{
typedef sub_match<_Bi_iter> value_type;
typedef const value_type& const_reference;
typedef const_reference reference;
typedef value_type& reference;
typedef typename _Base_type::const_iterator const_iterator;
typedef const_iterator iterator;
typedef typename __iter_traits::difference_type difference_type;

7
libstdc++-v3/testsuite/28_regex/match_results/typedefs.cc
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@ -39,4 +39,11 @@ test01()
typedef mr::allocator_type allocator_type;
typedef mr::char_type char_type;
typedef mr::string_type string_type;
static_assert(std::is_same<value_type, std::sub_match<char*>>::value, "");
static_assert(std::is_same<const_reference, const value_type&>::value, "");
static_assert(std::is_same<reference, value_type&>::value, "DR 2306");
static_assert(std::is_same<const_iterator, iterator>::value, "");
static_assert(std::is_same<char_type, char>::value, "");
static_assert(std::is_same<string_type, std::string>::value, "");
}