4fc502368a
`string_view` is supported all the way back to C++03 as an extension in `libc++`, and so many of the tests run in all standards modes for all vendors. This is unlikely desired by other standard library vendors using our test suite. So, disable the tests for vendors other than `libc++` in these older standards modes. Differential Revision: https://reviews.llvm.org/D126850
76 lines
1.8 KiB
C++
76 lines
1.8 KiB
C++
//===----------------------------------------------------------------------===//
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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: !stdlib=libc++ && (c++03 || c++11 || c++14)
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// <functional>
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// template <class T>
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// struct hash
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// : public unary_function<T, size_t>
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// {
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// size_t operator()(T val) const;
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// };
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// Not very portable
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#include <string_view>
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#include <string>
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#include <cassert>
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#include <type_traits>
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#include "test_macros.h"
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using std::string_view;
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template <class SV>
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void
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test()
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{
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typedef std::hash<SV> H;
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static_assert((std::is_same<typename H::argument_type, SV>::value), "" );
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static_assert((std::is_same<typename H::result_type, std::size_t>::value), "" );
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typedef typename SV::value_type char_type;
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typedef std::basic_string<char_type> String;
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typedef std::hash<String> SH;
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ASSERT_NOEXCEPT(H()(SV()));
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char_type g1 [ 10 ];
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char_type g2 [ 10 ];
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for ( int i = 0; i < 10; ++i )
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g1[i] = g2[9-i] = static_cast<char_type>('0' + i);
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H h;
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SH sh;
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SV s1(g1, 10);
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String ss1(s1);
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SV s2(g2, 10);
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String ss2(s2);
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assert(h(s1) == h(s1));
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assert(h(s1) != h(s2));
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assert(sh(ss1) == h(s1));
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assert(sh(ss2) == h(s2));
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}
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int main(int, char**)
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{
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test<std::string_view>();
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#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
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test<std::u8string_view>();
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#endif
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#ifndef TEST_HAS_NO_UNICODE_CHARS
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test<std::u16string_view>();
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test<std::u32string_view>();
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#endif
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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test<std::wstring_view>();
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#endif
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return 0;
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}
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