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114 lines
3.8 KiB
C++
114 lines
3.8 KiB
C++
// { dg-options "-std=gnu++17" }
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// { dg-do compile { target c++17 } }
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// Copyright (C) 2017-2019 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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// 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
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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 <string>
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template<typename CT>
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constexpr bool
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test_assign()
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{
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using char_type = typename CT::char_type;
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char_type s1[2] = {};
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const char_type s2[2] = {1, 0};
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CT::assign(s1[0], s2[0]);
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return s1[0] == char_type{1};
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}
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template<typename CT>
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constexpr bool
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test_compare()
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{
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using char_type = typename CT::char_type;
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const char_type s1[3] = {1, 2, 3};
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const char_type s2[3] = {1, 2, 3};
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if (CT::compare(s1, s2, 3) != 0)
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return false;
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if (CT::compare(s2, s1, 3) != 0)
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return false;
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if (CT::compare(s1+1, s2, 2) <= 0)
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return false;
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return true;
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}
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template<typename CT>
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constexpr bool
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test_length()
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{
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using char_type = typename CT::char_type;
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const char_type s1[4] = {1, 2, 3, 0};
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if (CT::length(s1) != 3)
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return false;
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if (CT::length(s1+1) != 2)
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return false;
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return true;
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}
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template<typename CT>
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constexpr bool
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test_find()
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{
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using char_type = typename CT::char_type;
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const char_type s1[3] = {1, 2, 3};
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if (CT::find(s1, 3, char_type{2}) != s1+1)
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return false;
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if (CT::find(s1, 3, char_type{4}) != nullptr)
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return false;
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return true;
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}
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#ifndef __cpp_lib_constexpr_char_traits
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# error Feature-test macro for constexpr char_traits is missing
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#elif __cpp_lib_constexpr_char_traits != 201611
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# error Feature-test macro for constexpr char_traits has the wrong value
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#endif
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static_assert( test_assign<std::char_traits<char>>() );
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static_assert( test_compare<std::char_traits<char>>() );
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static_assert( test_length<std::char_traits<char>>() );
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static_assert( test_find<std::char_traits<char>>() );
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#ifdef _GLIBCXX_USE_WCHAR_T
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static_assert( test_assign<std::char_traits<wchar_t>>() );
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static_assert( test_compare<std::char_traits<wchar_t>>() );
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static_assert( test_length<std::char_traits<wchar_t>>() );
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static_assert( test_find<std::char_traits<wchar_t>>() );
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#endif
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#ifdef _GLIBCXX_USE_CHAR8_T
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static_assert( test_assign<std::char_traits<char8_t>>() );
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static_assert( test_compare<std::char_traits<char8_t>>() );
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static_assert( test_length<std::char_traits<char8_t>>() );
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static_assert( test_find<std::char_traits<char8_t>>() );
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#endif
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static_assert( test_assign<std::char_traits<char16_t>>() );
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static_assert( test_compare<std::char_traits<char16_t>>() );
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static_assert( test_length<std::char_traits<char16_t>>() );
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static_assert( test_find<std::char_traits<char16_t>>() );
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static_assert( test_assign<std::char_traits<char32_t>>() );
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static_assert( test_compare<std::char_traits<char32_t>>() );
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static_assert( test_length<std::char_traits<char32_t>>() );
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static_assert( test_find<std::char_traits<char32_t>>() );
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struct C { unsigned char c; };
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constexpr bool operator==(const C& c1, const C& c2) { return c1.c == c2.c; }
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constexpr bool operator<(const C& c1, const C& c2) { return c1.c < c2.c; }
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static_assert( test_assign<std::char_traits<C>>() );
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static_assert( test_compare<std::char_traits<C>>() );
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static_assert( test_length<std::char_traits<C>>() );
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static_assert( test_find<std::char_traits<C>>() );
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