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Commit 92637e93 by Paolo Carlini Committed by Paolo Carlini
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re PR libstdc++/51558 (Declaration of unspecialized… 

re PR libstdc++/51558 (Declaration of unspecialized std::hash<_Tp>::operator()(_Tp) turns compile-time errors into link-time errors)

2011-12-15  Paolo Carlini  <paolo.carlini@oracle.com>
	    Jonathan Wakely  <jwakely.gcc@gmail.com>

	PR libstdc++/51558
	* include/bits/functional_hash.h (struct hash): Add static_assert.
	* src/compatibility-c++0x.cc: Adjust compatibility definitions.
	* testsuite/23_containers/unordered_map/erase/51142.cc: Adjust.
	* testsuite/23_containers/unordered_set/erase/51142.cc: Likewise.
	* testsuite/23_containers/unordered_multimap/erase/51142.cc: Likewise.
	* testsuite/23_containers/unordered_multiset/erase/51142.cc: Likewise.

Co-Authored-By: Jonathan Wakely <jwakely.gcc@gmail.com>

From-SVN: r182392
parent 5058651d
Showing with 75 additions and 27 deletions
libstdc++-v3/ChangeLog
2011-12-15 Paolo Carlini <paolo.carlini@oracle.com>
Jonathan Wakely <jwakely.gcc@gmail.com>
PR libstdc++/51558
* include/bits/functional_hash.h (struct hash): Add static_assert.
* src/compatibility-c++0x.cc: Adjust compatibility definitions.
* testsuite/23_containers/unordered_map/erase/51142.cc: Adjust.
* testsuite/23_containers/unordered_set/erase/51142.cc: Likewise.
* testsuite/23_containers/unordered_multimap/erase/51142.cc: Likewise.
* testsuite/23_containers/unordered_multiset/erase/51142.cc: Likewise.
2011-12-15 Benjamin Kosnik <bkoz@redhat.com> 2011-12-15 Benjamin Kosnik <bkoz@redhat.com>
* testsuite/22_locale/num_put/put/char/9780-2.cc: Add test for "C" * testsuite/22_locale/num_put/put/char/9780-2.cc: Add test for "C"
......
libstdc++-v3/include/bits/functional_hash.h
...@@ -57,8 +57,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION ...@@ -57,8 +57,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Tp> template<typename _Tp>
struct hash : public __hash_base<size_t, _Tp> struct hash : public __hash_base<size_t, _Tp>
{ {
size_t static_assert(sizeof(_Tp) < 0,
operator()(_Tp __val) const; "std::hash is not specialized for this type");
size_t operator()(const _Tp&) const noexcept;
}; };
/// Partial specializations for pointer types. /// Partial specializations for pointer types.
......
libstdc++-v3/src/compatibility-c++0x.cc
...@@ -52,36 +52,60 @@ namespace std _GLIBCXX_VISIBILITY(default) ...@@ -52,36 +52,60 @@ namespace std _GLIBCXX_VISIBILITY(default)
#ifndef _GLIBCXX_LONG_DOUBLE_COMPAT_IMPL #ifndef _GLIBCXX_LONG_DOUBLE_COMPAT_IMPL
template<> template<>
size_t struct hash<string>
hash<string>::operator()(string __s) const {
{ return _Hash_impl::hash(__s.data(), __s.length()); } size_t operator()(string) const;
};
size_t
hash<string>::operator()(string __s) const
{ return _Hash_impl::hash(__s.data(), __s.length()); }
template<> template<>
size_t struct hash<const string&>
hash<const string&>::operator()(const string& __s) const {
{ return _Hash_impl::hash(__s.data(), __s.length()); } size_t operator()(const string&) const;
};
size_t
hash<const string&>::operator()(const string& __s) const
{ return _Hash_impl::hash(__s.data(), __s.length()); }
#ifdef _GLIBCXX_USE_WCHAR_T #ifdef _GLIBCXX_USE_WCHAR_T
template<> template<>
size_t struct hash<wstring>
hash<wstring>::operator()(wstring __s) const {
{ return _Hash_impl::hash(__s.data(), __s.length() * sizeof(wchar_t)); } size_t operator()(wstring) const;
};
size_t
hash<wstring>::operator()(wstring __s) const
{ return _Hash_impl::hash(__s.data(), __s.length() * sizeof(wchar_t)); }
template<> template<>
size_t struct hash<const wstring&>
hash<const wstring&>::operator()(const wstring& __s) const {
{ return _Hash_impl::hash(__s.data(), __s.length() * sizeof(wchar_t)); } size_t operator()(const wstring&) const;
};
size_t
hash<const wstring&>::operator()(const wstring& __s) const
{ return _Hash_impl::hash(__s.data(), __s.length() * sizeof(wchar_t)); }
#endif #endif
#endif #endif
template<> template<>
size_t struct hash<error_code>
hash<error_code>::operator()(error_code __e) const
{ {
const size_t __tmp = std::_Hash_impl::hash(__e._M_value); size_t operator()(error_code) const;
return std::_Hash_impl::__hash_combine(__e._M_cat, __tmp); };
}
size_t
hash<error_code>::operator()(error_code __e) const
{
const size_t __tmp = std::_Hash_impl::hash(__e._M_value);
return std::_Hash_impl::__hash_combine(__e._M_cat, __tmp);
}
// gcc-4.7.0 // gcc-4.7.0
// <chrono> changes is_monotonic to is_steady. // <chrono> changes is_monotonic to is_steady.
......
libstdc++-v3/testsuite/23_containers/unordered_map/erase/51142.cc
...@@ -27,12 +27,15 @@ struct X ...@@ -27,12 +27,15 @@ struct X
X(T&) {} X(T&) {}
}; };
struct X_hash
{ std::size_t operator()(const X&) const { return 0; } };
bool operator==(const X&, const X&) { return false; } bool operator==(const X&, const X&) { return false; }
// LWG 2059. // LWG 2059.
void erasor(std::unordered_map<X, int>& s, X x) void erasor(std::unordered_map<X, int, X_hash>& s, X x)
{ {
std::unordered_map<X, int>::iterator it = s.find(x); std::unordered_map<X, int, X_hash>::iterator it = s.find(x);
if (it != s.end()) if (it != s.end())
s.erase(it); s.erase(it);
} }
libstdc++-v3/testsuite/23_containers/unordered_multimap/erase/51142.cc
...@@ -27,12 +27,15 @@ struct X ...@@ -27,12 +27,15 @@ struct X
X(T&) {} X(T&) {}
}; };
struct X_hash
{ std::size_t operator()(const X&) const { return 0; } };
bool operator==(const X&, const X&) { return false; } bool operator==(const X&, const X&) { return false; }
// LWG 2059. // LWG 2059.
void erasor(std::unordered_multimap<X, int>& s, X x) void erasor(std::unordered_multimap<X, int, X_hash>& s, X x)
{ {
std::unordered_multimap<X, int>::iterator it = s.find(x); std::unordered_multimap<X, int, X_hash>::iterator it = s.find(x);
if (it != s.end()) if (it != s.end())
s.erase(it); s.erase(it);
} }
libstdc++-v3/testsuite/23_containers/unordered_multiset/erase/51142.cc
...@@ -27,12 +27,15 @@ struct X ...@@ -27,12 +27,15 @@ struct X
X(T&) {} X(T&) {}
}; };
struct X_hash
{ std::size_t operator()(const X&) const { return 0; } };
bool operator==(const X&, const X&) { return false; } bool operator==(const X&, const X&) { return false; }
// LWG 2059. // LWG 2059.
void erasor(std::unordered_multiset<X>& s, X x) void erasor(std::unordered_multiset<X, X_hash>& s, X x)
{ {
std::unordered_multiset<X>::iterator it = s.find(x); std::unordered_multiset<X, X_hash>::iterator it = s.find(x);
if (it != s.end()) if (it != s.end())
s.erase(it); s.erase(it);
} }
libstdc++-v3/testsuite/23_containers/unordered_set/erase/51142.cc
...@@ -27,12 +27,15 @@ struct X ...@@ -27,12 +27,15 @@ struct X
X(T&) {} X(T&) {}
}; };
struct X_hash
{ std::size_t operator()(const X&) const { return 0; } };
bool operator==(const X&, const X&) { return false; } bool operator==(const X&, const X&) { return false; }
// LWG 2059. // LWG 2059.
void erasor(std::unordered_set<X>& s, X x) void erasor(std::unordered_set<X, X_hash>& s, X x)
{ {
std::unordered_set<X>::iterator it = s.find(x); std::unordered_set<X, X_hash>::iterator it = s.find(x);
if (it != s.end()) if (it != s.end())
s.erase(it); s.erase(it);
} }
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