move.h (forward): Implement N3143, resolving US 90.
2010-11-11 Paolo Carlini <paolo.carlini@oracle.com> * include/bits/move.h (forward): Implement N3143, resolving US 90. * testsuite/20_util/forward/a.cc: New. * testsuite/20_util/forward/b.cc: Likewise. * testsuite/20_util/forward/c_neg.cc: Likewise. * testsuite/20_util/forward/d.cc: Likewise. * testsuite/20_util/forward/e.cc: Likewise. * testsuite/20_util/forward/f_neg.cc: Likewise. From-SVN: r166599
This commit is contained in:
parent
280fedf067
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ad26988476
@ -1,3 +1,13 @@
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2010-11-11 Paolo Carlini <paolo.carlini@oracle.com>
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* include/bits/move.h (forward): Implement N3143, resolving US 90.
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* testsuite/20_util/forward/a.cc: New.
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* testsuite/20_util/forward/b.cc: Likewise.
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* testsuite/20_util/forward/c_neg.cc: Likewise.
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* testsuite/20_util/forward/d.cc: Likewise.
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* testsuite/20_util/forward/e.cc: Likewise.
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* testsuite/20_util/forward/f_neg.cc: Likewise.
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2010-11-10 François Dumont <francois.cppdevs@free.fr>
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* include/profile/unordered_map (unordered_map<>::_M_profile_size):
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@ -51,29 +51,20 @@ _GLIBCXX_END_NAMESPACE
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_GLIBCXX_BEGIN_NAMESPACE(std)
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/// forward (as per N2835)
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/// Forward lvalues as rvalues.
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/// forward (as per N3143)
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template<typename _Tp>
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inline typename enable_if<!is_lvalue_reference<_Tp>::value, _Tp&&>::type
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forward(typename std::common_type<_Tp>::type& __t)
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inline _Tp&&
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forward(typename std::remove_reference<_Tp>::type& __t)
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{ return static_cast<_Tp&&>(__t); }
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/// Forward rvalues as rvalues.
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template<typename _Tp>
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inline typename enable_if<!is_lvalue_reference<_Tp>::value, _Tp&&>::type
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forward(typename std::common_type<_Tp>::type&& __t)
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{ return static_cast<_Tp&&>(__t); }
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// Forward lvalues as lvalues.
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template<typename _Tp>
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inline typename enable_if<is_lvalue_reference<_Tp>::value, _Tp>::type
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forward(typename std::common_type<_Tp>::type __t)
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{ return __t; }
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// Prevent forwarding rvalues as const lvalues.
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template<typename _Tp>
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inline typename enable_if<is_lvalue_reference<_Tp>::value, _Tp>::type
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forward(typename std::remove_reference<_Tp>::type&& __t) = delete;
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inline _Tp&&
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forward(typename std::remove_reference<_Tp>::type&& __t)
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{
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static_assert(!std::is_lvalue_reference<_Tp>::value, "template argument"
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" substituting _Tp is an lvalue reference type");
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return static_cast<_Tp&&>(__t);
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}
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/**
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* @brief Move a value.
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77
libstdc++-v3/testsuite/20_util/forward/a.cc
Normal file
77
libstdc++-v3/testsuite/20_util/forward/a.cc
Normal file
@ -0,0 +1,77 @@
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// { dg-options "-std=gnu++0x" }
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// Copyright (C) 2010 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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#include <list>
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#include <testsuite_hooks.h>
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template <class T>
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struct C
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{
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T t_;
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template <class U,
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class = typename std::enable_if
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<
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!std::is_lvalue_reference<U>::value
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>::type>
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C(U&& u) : t_(std::forward<T>(std::move(u).get())) {}
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};
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class A
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{
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int data_;
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public:
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explicit
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A(int data = 1)
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: data_(data) {}
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~A() { data_ = -1; }
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void test() const
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{
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bool test __attribute__((unused)) = true;
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VERIFY( data_ == 3 );
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}
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};
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class Awrap
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{
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const A& a_;
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public:
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explicit Awrap(const A& a) : a_(a) { }
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const A& get() const { return a_; }
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};
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template <class C>
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void test(C c)
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{
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c.t_.test();
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}
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// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2951.html
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// Test A.
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int main()
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{
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std::list<C<const A&> > list;
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A a(3);
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C<const A&> c((Awrap(a)));
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list.push_back(c);
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test(c);
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test(list.front());
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}
|
77
libstdc++-v3/testsuite/20_util/forward/b.cc
Normal file
77
libstdc++-v3/testsuite/20_util/forward/b.cc
Normal file
@ -0,0 +1,77 @@
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// { dg-options "-std=gnu++0x" }
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// Copyright (C) 2010 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
|
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// terms of the GNU General Public License as published by the
|
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
|
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
|
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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#include <list>
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#include <testsuite_hooks.h>
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template <class T>
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struct C
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{
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T t_;
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template <class U,
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class = typename std::enable_if
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<
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!std::is_lvalue_reference<U>::value
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>::type>
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C(U&& u) : t_(std::forward<T>(std::move(u).get())) {}
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};
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class A
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{
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int data_;
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public:
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explicit
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A(int data = 1)
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: data_(data) { }
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~A() { data_ = -1; }
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void test() const
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{
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bool test __attribute__((unused)) = true;
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VERIFY( data_ == 3 );
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}
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};
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class Awrap
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{
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A a_;
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public:
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explicit Awrap(const A& a) : a_(a) { }
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A get() const { return a_; }
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};
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template <class C>
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void test(C c)
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{
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c.t_.test();
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}
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// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2951.html
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// Test B.
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int main()
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{
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std::list<C<A> > list;
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A a(3);
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C<A> c((Awrap(a)));
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list.push_back(c);
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test(c);
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test(list.front());
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}
|
78
libstdc++-v3/testsuite/20_util/forward/c_neg.cc
Normal file
78
libstdc++-v3/testsuite/20_util/forward/c_neg.cc
Normal file
@ -0,0 +1,78 @@
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// { dg-do compile }
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// { dg-options "-std=gnu++0x" }
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// Copyright (C) 2010 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
|
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// software; you can redistribute it and/or modify it under the
|
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// terms of the GNU General Public License as published by the
|
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// Free Software Foundation; either version 3, or (at your option)
|
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
|
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
|
||||
// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-error "static assertion failed" "" { target *-*-* } 64 }
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#include <list>
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template <class T>
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struct C
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{
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T t_;
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template <class U,
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class = typename std::enable_if
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<
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!std::is_lvalue_reference<U>::value
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>::type>
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C(U&& u) : t_(std::forward<T>(std::move(u).get())) {}
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};
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class A
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{
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int data_;
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public:
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explicit
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A(int data = 1)
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: data_(data) { }
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~A() { data_ = -1; }
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void test() const
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{
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__builtin_abort();
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}
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};
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class Awrap
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{
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const A& a_;
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public:
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explicit Awrap(const A& a) : a_(a) {}
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const A /* & */ get() const { return a_; }
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};
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template <class C>
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void test(C c)
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{
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c.t_.test();
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}
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// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2951.html
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// Test C.
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int main()
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{
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std::list<C<const A&> > list;
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A a(3);
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C<const A&> c((Awrap(a)));
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list.push_back(c);
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test(c);
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test(list.front());
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}
|
78
libstdc++-v3/testsuite/20_util/forward/d.cc
Normal file
78
libstdc++-v3/testsuite/20_util/forward/d.cc
Normal file
@ -0,0 +1,78 @@
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// { dg-options "-std=gnu++0x" }
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// Copyright (C) 2010 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
|
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
|
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
|
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//
|
||||
// You should have received a copy of the GNU General Public License along
|
||||
// with this library; see the file COPYING3. If not see
|
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// <http://www.gnu.org/licenses/>.
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#include <list>
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#include <testsuite_hooks.h>
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template <class T>
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struct C
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{
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T t_;
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template <class U,
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class = typename std::enable_if
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<
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!std::is_lvalue_reference<U>::value
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>::type>
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C(U&& u) : t_(std::forward<T>(std::move(u).get())) { }
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};
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|
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class A
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{
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int data_;
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public:
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explicit
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A(int data = 1)
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: data_(data) { }
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~A() { data_ = -1; }
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void test() const
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{
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bool test __attribute__((unused)) = true;
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VERIFY( data_ == 3 );
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}
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};
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class Awrap
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{
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A& a_;
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public:
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explicit Awrap(A& a) : a_(a) { }
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const A& get() const { return a_; }
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A& get() { return a_; }
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};
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template <class C>
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void test(C c)
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{
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c.t_.test();
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}
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// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2951.html
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// Test D.
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int main()
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{
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std::list<C<const A&> > list;
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A a(3);
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C<const A&> c((Awrap(a)));
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list.push_back(c);
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test(c);
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test(list.front());
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}
|
54
libstdc++-v3/testsuite/20_util/forward/e.cc
Normal file
54
libstdc++-v3/testsuite/20_util/forward/e.cc
Normal file
@ -0,0 +1,54 @@
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// { dg-do compile }
|
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// { dg-options "-std=gnu++0x" }
|
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|
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// Copyright (C) 2010 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 <utility>
|
||||
|
||||
template <class T>
|
||||
struct C
|
||||
{
|
||||
T t_;
|
||||
|
||||
C() { }
|
||||
|
||||
template <class U,
|
||||
class = typename std::enable_if
|
||||
<
|
||||
!std::is_lvalue_reference<U>::value
|
||||
>::type>
|
||||
C(U&& u) : t_(std::forward<T>(std::move(u).get())) { }
|
||||
|
||||
C(C&& c) : t_(std::forward<T>(c.t_)) { }
|
||||
};
|
||||
|
||||
template <class T>
|
||||
struct Derived
|
||||
: C<T>
|
||||
{
|
||||
Derived() { }
|
||||
Derived(Derived&& d) : C<T>(std::forward<C<T>>(d)) { }
|
||||
};
|
||||
|
||||
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2951.html
|
||||
// Test E.
|
||||
int main()
|
||||
{
|
||||
Derived<int> d;
|
||||
Derived<int> d2(std::move(d));
|
||||
}
|
90
libstdc++-v3/testsuite/20_util/forward/f_neg.cc
Normal file
90
libstdc++-v3/testsuite/20_util/forward/f_neg.cc
Normal file
@ -0,0 +1,90 @@
|
||||
// { dg-do compile }
|
||||
// { dg-options "-std=gnu++0x" }
|
||||
|
||||
// Copyright (C) 2010 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/>.
|
||||
|
||||
// { dg-error "static assertion failed" "" { target *-*-* } 64 }
|
||||
|
||||
#include <utility>
|
||||
|
||||
template <class T>
|
||||
struct C
|
||||
{
|
||||
T t_;
|
||||
|
||||
C() {}
|
||||
|
||||
explicit C(const T& t) : t_(t) { }
|
||||
|
||||
template <class U,
|
||||
class = typename std::enable_if
|
||||
<
|
||||
std::is_convertible<U, T>::value
|
||||
>::type>
|
||||
C(C<U>&& c) : t_(std::forward<T>(c.t_)) { }
|
||||
};
|
||||
|
||||
class B;
|
||||
|
||||
class A
|
||||
{
|
||||
int data_;
|
||||
|
||||
friend class B;
|
||||
public:
|
||||
explicit
|
||||
A(int data = 1)
|
||||
: data_(data) { }
|
||||
|
||||
~A() { data_ = -1; }
|
||||
|
||||
void test() const
|
||||
{
|
||||
__builtin_abort();
|
||||
}
|
||||
};
|
||||
|
||||
class B
|
||||
{
|
||||
int data_;
|
||||
public:
|
||||
explicit
|
||||
B(int data = 1)
|
||||
: data_(data) { }
|
||||
|
||||
B(const A& a) : data_(a.data_) { }
|
||||
|
||||
B(A&& a) : data_(a.data_) { a.data_ = 100; }
|
||||
|
||||
~B() { data_ = -1; }
|
||||
|
||||
void test() const
|
||||
{
|
||||
__builtin_abort();
|
||||
}
|
||||
};
|
||||
|
||||
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2951.html
|
||||
// Test F.
|
||||
int main()
|
||||
{
|
||||
A a(3);
|
||||
C<A> ca(a);
|
||||
C<const B&> cb(std::move(ca));
|
||||
cb.t_.test();
|
||||
}
|
Loading…
Reference in New Issue
Block a user