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 21 template <class S> 22 void 23 test(const S& lhs, const S& rhs, bool x, bool y) 24 { 25 assert((lhs < rhs) == x); 26 assert((rhs < lhs) == y); 27 } 28 29 int 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
