literal.pass.cpp (3000B)
1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // The LLVM Compiler Infrastructure 5 // 6 // This file is dual licensed under the MIT and the University of Illinois Open 7 // Source Licenses. See LICENSE.TXT for details. 8 // 9 //===----------------------------------------------------------------------===// 10 11 // UNSUPPORTED: c++98, c++03, c++11 12 // UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8, clang-3.9 13 // UNSUPPORTED: apple-clang-6, apple-clang-7, apple-clang-8 14 // Note: libc++ supports string_view before C++17, but literals were introduced in C++14 15 16 #include <string_view> 17 #include <cassert> 18 19 #include "test_macros.h" 20 21 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 22 typedef std::u8string_view u8string_view; 23 #else 24 typedef std::string_view u8string_view; 25 #endif 26 27 int main() 28 { 29 using namespace std::literals::string_view_literals; 30 31 static_assert ( std::is_same<decltype( "Hi"sv), std::string_view>::value, "" ); 32 static_assert ( std::is_same<decltype( u8"Hi"sv), u8string_view>::value, "" ); 33 static_assert ( std::is_same<decltype( L"Hi"sv), std::wstring_view>::value, "" ); 34 static_assert ( std::is_same<decltype( u"Hi"sv), std::u16string_view>::value, "" ); 35 static_assert ( std::is_same<decltype( U"Hi"sv), std::u32string_view>::value, "" ); 36 37 std::string_view foo; 38 std::wstring_view Lfoo; 39 u8string_view u8foo; 40 std::u16string_view ufoo; 41 std::u32string_view Ufoo; 42 43 44 foo = ""sv; assert( foo.size() == 0); 45 u8foo = u8""sv; assert(u8foo.size() == 0); 46 Lfoo = L""sv; assert( Lfoo.size() == 0); 47 ufoo = u""sv; assert( ufoo.size() == 0); 48 Ufoo = U""sv; assert( Ufoo.size() == 0); 49 50 foo = " "sv; assert( foo.size() == 1); 51 u8foo = u8" "sv; assert(u8foo.size() == 1); 52 Lfoo = L" "sv; assert( Lfoo.size() == 1); 53 ufoo = u" "sv; assert( ufoo.size() == 1); 54 Ufoo = U" "sv; assert( Ufoo.size() == 1); 55 56 foo = "ABC"sv; assert( foo == "ABC"); assert( foo == std::string_view ( "ABC")); 57 u8foo = u8"ABC"sv; assert(u8foo == u8"ABC"); assert(u8foo == u8string_view (u8"ABC")); 58 Lfoo = L"ABC"sv; assert( Lfoo == L"ABC"); assert( Lfoo == std::wstring_view ( L"ABC")); 59 ufoo = u"ABC"sv; assert( ufoo == u"ABC"); assert( ufoo == std::u16string_view( u"ABC")); 60 Ufoo = U"ABC"sv; assert( Ufoo == U"ABC"); assert( Ufoo == std::u32string_view( U"ABC")); 61 62 static_assert( "ABC"sv.size() == 3, ""); 63 static_assert(u8"ABC"sv.size() == 3, ""); 64 static_assert( L"ABC"sv.size() == 3, ""); 65 static_assert( u"ABC"sv.size() == 3, ""); 66 static_assert( U"ABC"sv.size() == 3, ""); 67 68 static_assert(noexcept( "ABC"sv), ""); 69 static_assert(noexcept(u8"ABC"sv), ""); 70 static_assert(noexcept( L"ABC"sv), ""); 71 static_assert(noexcept( u"ABC"sv), ""); 72 static_assert(noexcept( U"ABC"sv), ""); 73 }