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 basic_string_view () noexcept; 14 15 #include <string_view> 16 #include <cassert> 17 18 #include "test_macros.h" 19 20 template<typename T> 21 void test () { 22 #if TEST_STD_VER > 11 23 { 24 constexpr T sv1; 25 static_assert ( sv1.size() == 0, "" ); 26 static_assert ( sv1.empty(), ""); 27 } 28 #endif 29 30 { 31 T sv1; 32 assert ( sv1.size() == 0 ); 33 assert ( sv1.empty()); 34 } 35 } 36 37 int main () { 38 typedef std::string_view string_view; 39 typedef std::u16string_view u16string_view; 40 typedef std::u32string_view u32string_view; 41 typedef std::wstring_view wstring_view; 42 43 test<string_view> (); 44 test<u16string_view> (); 45 test<u32string_view> (); 46 test<wstring_view> (); 47 48 } 49
