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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libstdc++-v3/] [testsuite/] [20_util/] [declval/] [requirements/] [1.cc] - Rev 866
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// { dg-options "-std=gnu++0x" } // { dg-do compile } // 2009-11-12 Paolo Carlini <paolo.carlini@oracle.com> // // Copyright (C) 2009 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<typename From, typename To> struct is_convertible_mini { private: typedef char one; typedef struct { char arr[2]; } two; static one test(To); static two test(...); public: static const bool value = sizeof(test(std::declval<From>())) == 1; }; template<typename From, typename To> const bool is_convertible_mini<From, To>::value; void test01() { static_assert(is_convertible_mini<int*, const int*>::value, "#1"); static_assert(!is_convertible_mini<const void*, void*>::value, "#2"); static_assert(is_convertible_mini<float, double>::value, "#3"); static_assert(!is_convertible_mini<bool, int*>::value, "#4"); static_assert(is_convertible_mini<int(&)(int), int(*)(int)>::value, "#5"); static_assert(!is_convertible_mini<void*, int*>::value, "#6"); }
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