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 11 // <string_view> 12 13 // constexpr const _CharT& operator[](size_type _pos) const; 14 15 #include <experimental/string_view> 16 #include <cassert> 17 18 #include "test_macros.h" 19 20 template <typename CharT> 21 void test ( const CharT *s, size_t len ) { 22 std::experimental::basic_string_view<CharT> sv ( s, len ); 23 assert ( sv.length() == len ); 24 for ( size_t i = 0; i < len; ++i ) { 25 assert ( sv[i] == s[i] ); 26 assert ( &sv[i] == s + i ); 27 } 28 } 29 30 int main () { 31 test ( "ABCDE", 5 ); 32 test ( "a", 1 ); 33 34 test ( L"ABCDE", 5 ); 35 test ( L"a", 1 ); 36 37 #if TEST_STD_VER >= 11 38 test ( u"ABCDE", 5 ); 39 test ( u"a", 1 ); 40 41 test ( U"ABCDE", 5 ); 42 test ( U"a", 1 ); 43 #endif 44 45 #if TEST_STD_VER > 11 46 { 47 constexpr std::experimental::basic_string_view<char> sv ( "ABC", 2 ); 48 static_assert ( sv.length() == 2, "" ); 49 static_assert ( sv[0] == 'A', "" ); 50 static_assert ( sv[1] == 'B', "" ); 51 } 52 #endif 53 } 54
