0b8c8bc874
Reviewed By: #libc, philnik Spies: libcxx-commits Differential Revision: https://reviews.llvm.org/D151884
69 lines
1.8 KiB
C++
69 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: c++03, c++11, c++14, c++17
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// <sstream>
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// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
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// class basic_stringstream
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// basic_string_view<charT, traits> view() const noexcept;
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#include <sstream>
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#include <cassert>
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#include <type_traits>
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#include "make_string.h"
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#include "test_macros.h"
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#define STR(S) MAKE_STRING(CharT, S)
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#define SV(S) MAKE_STRING_VIEW(CharT, S)
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template <class CharT>
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struct my_char_traits : public std::char_traits<CharT> {};
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template <class CharT>
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static void test() {
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std::basic_stringstream<CharT> ss(STR(" 123 456 "));
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static_assert(noexcept(ss.view()));
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assert(ss.view() == SV(" 123 456 "));
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int i = 0;
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ss >> i;
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assert(i == 123);
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ss >> i;
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assert(i == 456);
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ss << i << ' ' << 123;
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assert(ss.view() == SV("456 1236 "));
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ss.str(STR("5466 89 "));
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ss >> i;
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assert(i == 5466);
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ss >> i;
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assert(i == 89);
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ss << i << ' ' << 321;
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assert(ss.view() == SV("89 3219 "));
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const std::basic_stringstream<CharT> css(STR("abc"));
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static_assert(noexcept(css.view()));
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assert(css.view() == SV("abc"));
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std::basic_stringstream<CharT, my_char_traits<CharT>> tss;
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static_assert(std::is_same_v<decltype(tss.view()), std::basic_string_view<CharT, my_char_traits<CharT>>>);
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}
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int main(int, char**) {
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test<char>();
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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test<wchar_t>();
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#endif
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std::stringstream ss;
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ss.write("\xd1", 1);
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assert(ss.view().length() == 1);
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return 0;
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}
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