838f2890fd
Add test coverage for the new behaviors, especially to verify that the returned string uses the correct allocator. Fixes https://github.com/llvm/llvm-project/issues/64644 Migrated from https://reviews.llvm.org/D157776 — @philnik777 @pfusik @ldionne @mordante please take another look!
57 lines
1.5 KiB
C++
57 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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// 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<charT, traits, Allocator> str() &&;
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#include <sstream>
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#include <cassert>
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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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template <class CharT>
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static void test() {
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{
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std::basic_stringstream<CharT> ss(STR("testing"));
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std::basic_string<CharT> s = std::move(ss).str();
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assert(s == STR("testing"));
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assert(ss.view().empty());
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}
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{
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std::basic_stringstream<CharT> ss;
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std::basic_string<CharT> s = std::move(ss).str();
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assert(s.empty());
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assert(ss.view().empty());
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}
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{
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std::basic_stringstream<CharT> ss(
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STR("a very long string that exceeds the small string optimization buffer length"));
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const CharT* p = ss.view().data();
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std::basic_string<CharT> s = std::move(ss).str();
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assert(s.data() == p); // the allocation was pilfered
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assert(ss.view().empty());
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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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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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test<wchar_t>();
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#endif
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return 0;
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}
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