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 int main() 20 { 21 using namespace std::literals::string_view_literals; 22 23 static_assert ( std::is_same<decltype( "Hi"sv), std::string_view>::value, "" ); 24 static_assert ( std::is_same<decltype( u8"Hi"sv), std::string_view>::value, "" ); 25 static_assert ( std::is_same<decltype( L"Hi"sv), std::wstring_view>::value, "" ); 26 static_assert ( std::is_same<decltype( u"Hi"sv), std::u16string_view>::value, "" ); 27 static_assert ( std::is_same<decltype( U"Hi"sv), std::u32string_view>::value, "" ); 28 29 std::string_view foo; 30 std::wstring_view Lfoo; 31 std::u16string_view ufoo; 32 std::u32string_view Ufoo; 33 34 foo = ""sv; assert( foo.size() == 0); 35 foo = u8""sv; assert( foo.size() == 0); 36 Lfoo = L""sv; assert(Lfoo.size() == 0); 37 ufoo = u""sv; assert(ufoo.size() == 0); 38 Ufoo = U""sv; assert(Ufoo.size() == 0); 39 40 foo = " "sv; assert( foo.size() == 1); 41 foo = u8" "sv; assert( foo.size() == 1); 42 Lfoo = L" "sv; assert(Lfoo.size() == 1); 43 ufoo = u" "sv; assert(ufoo.size() == 1); 44 Ufoo = U" "sv; assert(Ufoo.size() == 1); 45 46 foo = "ABC"sv; assert( foo == "ABC"); assert( foo == std::string_view ( "ABC")); 47 foo = u8"ABC"sv; assert( foo == u8"ABC"); assert( foo == std::string_view (u8"ABC")); 48 Lfoo = L"ABC"sv; assert(Lfoo == L"ABC"); assert(Lfoo == std::wstring_view ( L"ABC")); 49 ufoo = u"ABC"sv; assert(ufoo == u"ABC"); assert(ufoo == std::u16string_view( u"ABC")); 50 Ufoo = U"ABC"sv; assert(Ufoo == U"ABC"); assert(Ufoo == std::u32string_view( U"ABC")); 51 52 static_assert( "ABC"sv.size() == 3, ""); 53 static_assert(u8"ABC"sv.size() == 3, ""); 54 static_assert( L"ABC"sv.size() == 3, ""); 55 static_assert( u"ABC"sv.size() == 3, ""); 56 static_assert( U"ABC"sv.size() == 3, ""); 57 } 58
