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re PR libstdc++/61947 (Ambiguous calls when constructing std::tuple) 

PR libstdc++/61947
	* include/std/tuple (_Head_base): Use allocator_arg_t parameters to
	disambiguate unary constructors.
	(_Tuple_impl): Pass allocator_arg_t arguments.
	* testsuite/20_util/tuple/61947.cc: New.
	* testsuite/20_util/uses_allocator/cons_neg.cc: Adjust dg-error line.

From-SVN: r213221
This commit is contained in:
Jonathan Wakely 2014-07-29 18:30:34 +01:00 committed by Jonathan Wakely
parent aec20dcf39
commit f4081d133f
4 changed files with 52 additions and 14 deletions
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7
libstdc++-v3/ChangeLog
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@ -6,6 +6,13 @@
_S_new_RopeFunction.
* testsuite/ext/rope/61946.cc: New.
PR libstdc++/61947
* include/std/tuple (_Head_base): Use allocator_arg_t parameters to
disambiguate unary constructors.
(_Tuple_impl): Pass allocator_arg_t arguments.
* testsuite/20_util/tuple/61947.cc: New.
* testsuite/20_util/uses_allocator/cons_neg.cc: Adjust dg-error line.
2014-07-29 Ed Smith-Rowland <3dw4rd@verizon.net>
PR libstdc++/60037 - SIGFPE in std::generate_canonical<unsigned int...>

28
libstdc++-v3/include/std/tuple
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@ -61,21 +61,22 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
constexpr _Head_base(const _Head& __h)
: _Head(__h) { }
template<typename _UHead, typename = typename
enable_if<!is_convertible<_UHead,
__uses_alloc_base>::value>::type>
constexpr _Head_base(const _Head_base&) = default;
constexpr _Head_base(_Head_base&&) = default;
template<typename _UHead>
constexpr _Head_base(_UHead&& __h)
: _Head(std::forward<_UHead>(__h)) { }
_Head_base(__uses_alloc0)
_Head_base(allocator_arg_t, __uses_alloc0)
: _Head() { }
template<typename _Alloc>
_Head_base(__uses_alloc1<_Alloc> __a)
_Head_base(allocator_arg_t, __uses_alloc1<_Alloc> __a)
: _Head(allocator_arg, *__a._M_a) { }
template<typename _Alloc>
_Head_base(__uses_alloc2<_Alloc> __a)
_Head_base(allocator_arg_t, __uses_alloc2<_Alloc> __a)
: _Head(*__a._M_a) { }
template<typename _UHead>
@ -106,21 +107,22 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
constexpr _Head_base(const _Head& __h)
: _M_head_impl(__h) { }
template<typename _UHead, typename = typename
enable_if<!is_convertible<_UHead,
__uses_alloc_base>::value>::type>
constexpr _Head_base(const _Head_base&) = default;
constexpr _Head_base(_Head_base&&) = default;
template<typename _UHead>
constexpr _Head_base(_UHead&& __h)
: _M_head_impl(std::forward<_UHead>(__h)) { }
_Head_base(__uses_alloc0)
_Head_base(allocator_arg_t, __uses_alloc0)
: _M_head_impl() { }
template<typename _Alloc>
_Head_base(__uses_alloc1<_Alloc> __a)
_Head_base(allocator_arg_t, __uses_alloc1<_Alloc> __a)
: _M_head_impl(allocator_arg, *__a._M_a) { }
template<typename _Alloc>
_Head_base(__uses_alloc2<_Alloc> __a)
_Head_base(allocator_arg_t, __uses_alloc2<_Alloc> __a)
: _M_head_impl(*__a._M_a) { }
template<typename _UHead>
@ -258,7 +260,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Alloc>
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a)
: _Inherited(__tag, __a),
_Base(__use_alloc<_Head>(__a)) { }
_Base(__tag, __use_alloc<_Head>(__a)) { }
template<typename _Alloc>
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,

29
libstdc++-v3/testsuite/20_util/tuple/61947.cc Normal file
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@ -0,0 +1,29 @@
// { dg-options "-std=gnu++11" }
// { dg-do compile }
// Copyright (C) 2014 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/>.
#include <tuple>
struct ConvertibleToAny {
template <class T> operator T() const { return T(); }
};
int main() {
std::tuple<ConvertibleToAny&&> t(ConvertibleToAny{});
}

2
libstdc++-v3/testsuite/20_util/uses_allocator/cons_neg.cc
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@ -44,4 +44,4 @@ void test01()
tuple<Type> t(allocator_arg, a, 1);
}
// { dg-error "no matching function" "" { target *-*-* } 91 }
// { dg-error "no matching function" "" { target *-*-* } 92 }