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& operator=(const basic_string_view &) noexcept = default; 14 15 #include <string_view> 16 #include <cassert> 17 18 #include "test_macros.h" 19 20 template<typename T> 21 #if TEST_STD_VER > 11 22 constexpr 23 #endif 24 bool test (T sv0) 25 { 26 T sv1; 27 sv1 = sv0; 28 // We can't just say "sv0 == sv1" here because string_view::compare 29 // isn't constexpr until C++17, and we want to support back to C++14 30 return sv0.size() == sv1.size() && sv0.data() == sv1.data(); 31 } 32 33 int main () { 34 35 assert( test<std::string_view> ( "1234")); 36 #ifdef _LIBCPP_HAS_NO_UNICODE_CHARS 37 assert( test<std::u16string_view> (u"1234")); 38 assert( test<std::u32string_view> (U"1234")); 39 #endif 40 assert( test<std::wstring_view> (L"1234")); 41 42 #if TEST_STD_VER > 11 43 static_assert( test<std::string_view> ({ "abc", 3}), ""); 44 #ifdef _LIBCPP_HAS_NO_UNICODE_CHARS 45 static_assert( test<std::u16string_view> ({u"abc", 3}), ""); 46 static_assert( test<std::u32string_view> ({U"abc", 3}), ""); 47 #endif 48 static_assert( test<std::wstring_view> ({L"abc", 3}), ""); 49 #endif 50 } 51
