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75 lines
3.0 KiB
C++
75 lines
3.0 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11
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// UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8, clang-3.9
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// UNSUPPORTED: apple-clang-6, apple-clang-7, apple-clang-8
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// Note: libc++ supports string_view before C++17, but literals were introduced in C++14
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#include <string_view>
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#include <cassert>
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#include "test_macros.h"
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#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
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typedef std::u8string_view u8string_view;
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#else
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typedef std::string_view u8string_view;
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#endif
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int main(int, char**)
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{
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using namespace std::literals::string_view_literals;
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static_assert ( std::is_same<decltype( "Hi"sv), std::string_view>::value, "" );
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static_assert ( std::is_same<decltype( u8"Hi"sv), u8string_view>::value, "" );
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static_assert ( std::is_same<decltype( L"Hi"sv), std::wstring_view>::value, "" );
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static_assert ( std::is_same<decltype( u"Hi"sv), std::u16string_view>::value, "" );
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static_assert ( std::is_same<decltype( U"Hi"sv), std::u32string_view>::value, "" );
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std::string_view foo;
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std::wstring_view Lfoo;
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u8string_view u8foo;
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std::u16string_view ufoo;
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std::u32string_view Ufoo;
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foo = ""sv; assert( foo.size() == 0);
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u8foo = u8""sv; assert(u8foo.size() == 0);
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Lfoo = L""sv; assert( Lfoo.size() == 0);
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ufoo = u""sv; assert( ufoo.size() == 0);
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Ufoo = U""sv; assert( Ufoo.size() == 0);
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foo = " "sv; assert( foo.size() == 1);
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u8foo = u8" "sv; assert(u8foo.size() == 1);
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Lfoo = L" "sv; assert( Lfoo.size() == 1);
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ufoo = u" "sv; assert( ufoo.size() == 1);
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Ufoo = U" "sv; assert( Ufoo.size() == 1);
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foo = "ABC"sv; assert( foo == "ABC"); assert( foo == std::string_view ( "ABC"));
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u8foo = u8"ABC"sv; assert(u8foo == u8"ABC"); assert(u8foo == u8string_view (u8"ABC"));
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Lfoo = L"ABC"sv; assert( Lfoo == L"ABC"); assert( Lfoo == std::wstring_view ( L"ABC"));
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ufoo = u"ABC"sv; assert( ufoo == u"ABC"); assert( ufoo == std::u16string_view( u"ABC"));
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Ufoo = U"ABC"sv; assert( Ufoo == U"ABC"); assert( Ufoo == std::u32string_view( U"ABC"));
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static_assert( "ABC"sv.size() == 3, "");
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static_assert(u8"ABC"sv.size() == 3, "");
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static_assert( L"ABC"sv.size() == 3, "");
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static_assert( u"ABC"sv.size() == 3, "");
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static_assert( U"ABC"sv.size() == 3, "");
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static_assert(noexcept( "ABC"sv), "");
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static_assert(noexcept(u8"ABC"sv), "");
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static_assert(noexcept( L"ABC"sv), "");
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static_assert(noexcept( u"ABC"sv), "");
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static_assert(noexcept( U"ABC"sv), "");
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return 0;
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}
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