//===----------------------------------------------------------------------===// // // The LLVM Compiler Infrastructure // // This file is dual licensed under the MIT and the University of Illinois Open // Source Licenses. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // <string_view> // constexpr const _CharT& operator[](size_type _pos) const; #include <experimental/string_view> #include <cassert> template <typename CharT> void test ( const CharT *s, size_t len ) { std::experimental::basic_string_view<CharT> sv ( s, len ); assert ( sv.length() == len ); for ( size_t i = 0; i < len; ++i ) { assert ( sv[i] == s[i] ); assert ( &sv[i] == s + i ); } } int main () { test ( "ABCDE", 5 ); test ( "a", 1 ); test ( L"ABCDE", 5 ); test ( L"a", 1 ); #if __cplusplus >= 201103L test ( u"ABCDE", 5 ); test ( u"a", 1 ); test ( U"ABCDE", 5 ); test ( U"a", 1 ); #endif #if _LIBCPP_STD_VER > 11 { constexpr std::experimental::basic_string_view<char> sv ( "ABC", 2 ); static_assert ( sv.length() == 2, "" ); static_assert ( sv[0] == 'A', "" ); static_assert ( sv[1] == 'B', "" ); } #endif }