1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// <string> 11 12// template<class charT, class traits> 13// constexpr bool operator<(basic_string_view<charT,traits> lhs, 14// basic_string_view<charT,traits> rhs); 15 16#include <experimental/string_view> 17#include <cassert> 18 19#include "constexpr_char_traits.hpp" 20 21template <class S> 22void 23test(const S& lhs, const S& rhs, bool x, bool y) 24{ 25 assert((lhs < rhs) == x); 26 assert((rhs < lhs) == y); 27} 28 29int main() 30{ 31 { 32 typedef std::experimental::string_view S; 33 test(S(""), S(""), false, false); 34 test(S(""), S("abcde"), true, false); 35 test(S(""), S("abcdefghij"), true, false); 36 test(S(""), S("abcdefghijklmnopqrst"), true, false); 37 test(S("abcde"), S(""), false, true); 38 test(S("abcde"), S("abcde"), false, false); 39 test(S("abcde"), S("abcdefghij"), true, false); 40 test(S("abcde"), S("abcdefghijklmnopqrst"), true, false); 41 test(S("abcdefghij"), S(""), false, true); 42 test(S("abcdefghij"), S("abcde"), false, true); 43 test(S("abcdefghij"), S("abcdefghij"), false, false); 44 test(S("abcdefghij"), S("abcdefghijklmnopqrst"), true, false); 45 test(S("abcdefghijklmnopqrst"), S(""), false, true); 46 test(S("abcdefghijklmnopqrst"), S("abcde"), false, true); 47 test(S("abcdefghijklmnopqrst"), S("abcdefghij"), false, true); 48 test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), false, false); 49 } 50 51#if _LIBCPP_STD_VER > 11 52 { 53 typedef std::experimental::basic_string_view<char, constexpr_char_traits<char>> SV; 54 constexpr SV sv1; 55 constexpr SV sv2 { "abcde", 5 }; 56 57 static_assert (!(sv1 < sv1), "" ); 58 static_assert (!(sv2 < sv2), "" ); 59 60 static_assert ( sv1 < sv2, "" ); 61 static_assert (!(sv2 < sv1), "" ); 62 } 63#endif 64} 65