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, class Allocator> 13 // constexpr bool operator>=(const charT* lhs, basic_string_wiew<charT,traits> rhs); 14 // template<class charT, class traits, class Allocator> 15 // constexpr bool operator>=(basic_string_wiew<charT,traits> lhs, const charT* rhs); 16 17 #include <experimental/string_view> 18 #include <cassert> 19 20 #include "constexpr_char_traits.hpp" 21 22 template <class S> 23 void 24 test(const typename S::value_type* lhs, const S& rhs, bool x, bool y) 25 { 26 assert((lhs >= rhs) == x); 27 assert((rhs >= lhs) == y); 28 } 29 30 int main() 31 { 32 { 33 typedef std::experimental::string_view S; 34 test("", S(""), true, true); 35 test("", S("abcde"), false, true); 36 test("", S("abcdefghij"), false, true); 37 test("", S("abcdefghijklmnopqrst"), false, true); 38 test("abcde", S(""), true, false); 39 test("abcde", S("abcde"), true, true); 40 test("abcde", S("abcdefghij"), false, true); 41 test("abcde", S("abcdefghijklmnopqrst"), false, true); 42 test("abcdefghij", S(""), true, false); 43 test("abcdefghij", S("abcde"), true, false); 44 test("abcdefghij", S("abcdefghij"), true, true); 45 test("abcdefghij", S("abcdefghijklmnopqrst"), false, true); 46 test("abcdefghijklmnopqrst", S(""), true, false); 47 test("abcdefghijklmnopqrst", S("abcde"), true, false); 48 test("abcdefghijklmnopqrst", S("abcdefghij"), true, false); 49 test("abcdefghijklmnopqrst", S("abcdefghijklmnopqrst"), true, true); 50 } 51 52 #if _LIBCPP_STD_VER > 11 53 { 54 typedef std::experimental::basic_string_view<char, constexpr_char_traits<char>> SV; 55 constexpr SV sv1; 56 constexpr SV sv2 { "abcde", 5 }; 57 58 static_assert ( sv1 >= "", "" ); 59 static_assert ( "" >= sv1, "" ); 60 static_assert (!(sv1 >= "abcde"), "" ); 61 static_assert ( "abcde" >= sv1, "" ); 62 63 static_assert ( sv2 >= "", "" ); 64 static_assert (!("" >= sv2), "" ); 65 static_assert ( sv2 >= "abcde", "" ); 66 static_assert ( "abcde" >= sv2, "" ); 67 static_assert (!(sv2 >= "abcde0"), "" ); 68 static_assert ( "abcde0" >= sv2, "" ); 69 } 70 #endif 71 } 72