forked from OSchip/llvm-project
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <string>
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// template<class charT, class traits, class Allocator>
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// constexpr bool operator<(const charT* lhs, basic_string_wiew<charT,traits> rhs);
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// template<class charT, class traits, class Allocator>
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// constexpr bool operator<(basic_string_wiew<charT,traits> lhs, const charT* rhs);
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#include <string_view>
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#include <cassert>
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#include "test_macros.h"
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#include "constexpr_char_traits.hpp"
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template <class S>
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void
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test(const typename S::value_type* lhs, const S& rhs, bool x, bool y)
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{
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assert((lhs < rhs) == x);
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assert((rhs < lhs) == y);
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}
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int main()
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{
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{
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typedef std::string_view S;
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test("", S(""), false, false);
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test("", S("abcde"), true, false);
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test("", S("abcdefghij"), true, false);
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test("", S("abcdefghijklmnopqrst"), true, false);
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test("abcde", S(""), false, true);
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test("abcde", S("abcde"), false, false);
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test("abcde", S("abcdefghij"), true, false);
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test("abcde", S("abcdefghijklmnopqrst"), true, false);
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test("abcdefghij", S(""), false, true);
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test("abcdefghij", S("abcde"), false, true);
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test("abcdefghij", S("abcdefghij"), false, false);
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test("abcdefghij", S("abcdefghijklmnopqrst"), true, false);
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test("abcdefghijklmnopqrst", S(""), false, true);
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test("abcdefghijklmnopqrst", S("abcde"), false, true);
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test("abcdefghijklmnopqrst", S("abcdefghij"), false, true);
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test("abcdefghijklmnopqrst", S("abcdefghijklmnopqrst"), false, false);
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}
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#if TEST_STD_VER > 11
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{
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typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
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constexpr SV sv1;
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constexpr SV sv2 { "abcde", 5 };
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static_assert (!(sv1 < ""), "" );
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static_assert (!("" < sv1), "" );
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static_assert ( sv1 < "abcde", "" );
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static_assert (!("abcde" < sv1), "" );
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static_assert (!(sv2 < ""), "" );
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static_assert ( "" < sv2, "" );
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static_assert (!(sv2 < "abcde"), "" );
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static_assert (!("abcde" < sv2), "" );
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static_assert ( sv2 < "abcde0", "" );
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static_assert (!("abcde0" < sv2), "" );
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}
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#endif
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}
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