b101f01382
``` Benchmark old new Difference % Difference ---------------------------------------------- -------------- -------------- ------------ -------------- std::copy(CharT*,_CharT*,_ostreambuf_iterator) 8115.45 329.54 -7785.91 -95.94% ```
54 lines
1.5 KiB
C++
54 lines
1.5 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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// <algorithm>
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// template<class CharT, class Traits>
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// constexpr OutIter
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// copy(CharT* first, CharT* last, ostreambuf_iterator<CharT, Traits> result);
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// UNSUPPORTED: no-localization
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#include <algorithm>
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#include <cassert>
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#include <iterator>
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#include <sstream>
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#include <type_traits>
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#include "stream_types.h"
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#include "test_macros.h"
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template <class CCharT>
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void test() {
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using CharT = typename std::remove_cv<CCharT>::type;
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{
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std::basic_ostringstream<CharT> oss;
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CCharT buff[] = {'B', 'a', 'n', 'a', 'n', 'e'};
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std::copy(std::begin(buff), std::end(buff), std::ostreambuf_iterator<CharT>(oss));
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assert(oss.str() == std::basic_string_view<CharT>(buff, 6));
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}
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{
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failing_streambuf<CharT> fsb(4);
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std::basic_ostream<CharT> oss(&fsb);
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CCharT buff[] = {'B', 'a', 'n', 'a', 'n', 'e'};
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auto res = std::copy(std::begin(buff), std::end(buff), std::ostreambuf_iterator<CharT>(oss));
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assert(res.failed());
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assert(fsb.str() == std::basic_string_view<CharT>(buff, 4));
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}
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}
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int main(int, char**) {
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test<char>();
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test<const char>();
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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test<wchar_t>();
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test<const wchar_t>();
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#endif
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return 0;
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}
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