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re PR libstdc++/47773 (Versatile string lacks a default hash function)

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2011-02-16  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/47773
	* include/ext/vstring.h (hash<__gnu_cxx::__vstring>,
	hash<__gnu_cxx::__wvstring>, hash<__gnu_cxx::__u16vstring>,
	hash<__gnu_cxx::__u32vstring>): Add.
	* testsuite/ext/vstring/hash/char/1.cc: New.
	* testsuite/ext/vstring/hash/wchar_t/1.cc: Likewise.

From-SVN: r170235
This commit is contained in:
Paolo Carlini 2011-02-17 01:24:37 +00:00 committed by Paolo Carlini
parent a3daf81795
commit bde8d7f701
4 changed files with 179 additions and 0 deletions
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9
libstdc++-v3/ChangeLog
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@ -1,3 +1,12 @@
2011-02-16 Paolo Carlini <paolo.carlini@oracle.com>
PR libstdc++/47773
* include/ext/vstring.h (hash<__gnu_cxx::__vstring>,
hash<__gnu_cxx::__wvstring>, hash<__gnu_cxx::__u16vstring>,
hash<__gnu_cxx::__u32vstring>): Add.
* testsuite/ext/vstring/hash/char/1.cc: New.
* testsuite/ext/vstring/hash/wchar_t/1.cc: Likewise.
2011-02-16 Jonathan Wakely <jwakely.gcc@gmail.com>
* include/bits/regex.h (match_results::format): Use char_traits.

60
libstdc++-v3/include/ext/vstring.h
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@ -2731,6 +2731,66 @@ _GLIBCXX_END_NAMESPACE_VERSION
#endif
#ifdef __GXX_EXPERIMENTAL_CXX0X__
#include <bits/functional_hash.h>
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
/// std::hash specialization for __vstring.
template<>
struct hash<__gnu_cxx::__vstring>
: public __hash_base<size_t, __gnu_cxx::__vstring>
{
size_t
operator()(const __gnu_cxx::__vstring& __s) const
{ return std::_Hash_impl::hash(__s.data(), __s.length()); }
};
#ifdef _GLIBCXX_USE_WCHAR_T
/// std::hash specialization for __wvstring.
template<>
struct hash<__gnu_cxx::__wvstring>
: public __hash_base<size_t, __gnu_cxx::__wvstring>
{
size_t
operator()(const __gnu_cxx::__wvstring& __s) const
{ return std::_Hash_impl::hash(__s.data(),
__s.length() * sizeof(wchar_t)); }
};
#endif
#ifdef _GLIBCXX_USE_C99_STDINT_TR1
/// std::hash specialization for __u16vstring.
template<>
struct hash<__gnu_cxx::__u16vstring>
: public __hash_base<size_t, __gnu_cxx::__u16vstring>
{
size_t
operator()(const __gnu_cxx::__u16vstring& __s) const
{ return std::_Hash_impl::hash(__s.data(),
__s.length() * sizeof(char16_t)); }
};
/// std::hash specialization for __u32vstring.
template<>
struct hash<__gnu_cxx::__u32vstring>
: public __hash_base<size_t, __gnu_cxx::__u32vstring>
{
size_t
operator()(const __gnu_cxx::__u32vstring& __s) const
{ return std::_Hash_impl::hash(__s.data(),
__s.length() * sizeof(char32_t)); }
};
#endif
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
#endif /* __GXX_EXPERIMENTAL_CXX0X__ */
#include "vstring.tcc"
#endif /* _VSTRING_H */

55
libstdc++-v3/testsuite/ext/vstring/hash/char/1.cc Normal file
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@ -0,0 +1,55 @@
// { dg-options "-std=gnu++0x" }
// { dg-require-string-conversions "" }
// Copyright (C) 2011 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 Pred 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/>.
#include <ext/vstring.h>
#include <unordered_map>
#include <testsuite_hooks.h>
// libstdc++/47773
void test01()
{
bool test __attribute__((unused)) = true;
typedef __gnu_cxx::__vstring vstring_t;
typedef std::unordered_map<vstring_t, int> map_t;
map_t mymap;
mymap.insert(std::make_pair("hello", 10));
mymap.insert(std::make_pair("hi", 20));
VERIFY( mymap.size() == 2 );
map_t::const_iterator imap = mymap.begin();
VERIFY( vstring_t(imap->first.c_str()) == "hi" );
VERIFY( imap->second == 20 );
++imap;
VERIFY( vstring_t(imap->first.c_str()) == "hello" );
VERIFY( imap->second == 10 );
}
int main()
{
test01();
return 0;
}

55
libstdc++-v3/testsuite/ext/vstring/hash/wchar_t/1.cc Normal file
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@ -0,0 +1,55 @@
// { dg-options "-std=gnu++0x" }
// { dg-require-string-conversions "" }
// Copyright (C) 2011 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 Pred 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/>.
#include <ext/vstring.h>
#include <unordered_map>
#include <testsuite_hooks.h>
// libstdc++/47773
void test01()
{
bool test __attribute__((unused)) = true;
typedef __gnu_cxx::__wvstring vstring_t;
typedef std::unordered_map<vstring_t, int> map_t;
map_t mymap;
mymap.insert(std::make_pair(L"hello", 10));
mymap.insert(std::make_pair(L"hi", 20));
VERIFY( mymap.size() == 2 );
map_t::const_iterator imap = mymap.begin();
VERIFY( vstring_t(imap->first.c_str()) == L"hi" );
VERIFY( imap->second == 20 );
++imap;
VERIFY( vstring_t(imap->first.c_str()) == L"hello" );
VERIFY( imap->second == 10 );
}
int main()
{
test01();
return 0;
}