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!
73 lines
1.9 KiB
C++
73 lines
1.9 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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// <sstream>
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// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
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// class basic_stringbuf
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// void str(const basic_string<charT,traits,Allocator>& s);
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#include <sstream>
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#include <string>
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#include <cassert>
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#include "test_macros.h"
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struct StringBuf : std::stringbuf {
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explicit StringBuf(const char* s, std::ios_base::openmode mode) : basic_stringbuf(s, mode) {}
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void public_setg(int a, int b, int c) {
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char* p = eback();
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this->setg(p + a, p + b, p + c);
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}
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};
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static void test_altered_sequence_pointers() {
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{
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StringBuf src("hello world", std::ios_base::in);
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src.public_setg(4, 6, 9);
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std::stringbuf dest;
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dest = std::move(src);
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std::string str = dest.str();
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assert(5 <= str.size() && str.size() <= 11);
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LIBCPP_ASSERT(str == "o wor");
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LIBCPP_ASSERT(dest.str() == "o wor");
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}
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{
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StringBuf src("hello world", std::ios_base::in);
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src.public_setg(4, 6, 9);
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std::stringbuf dest;
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dest.swap(src);
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std::string str = dest.str();
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assert(5 <= str.size() && str.size() <= 11);
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LIBCPP_ASSERT(str == "o wor");
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LIBCPP_ASSERT(dest.str() == "o wor");
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}
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}
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int main(int, char**)
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{
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test_altered_sequence_pointers();
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{
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std::stringbuf buf("testing");
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assert(buf.str() == "testing");
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buf.str("another test");
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assert(buf.str() == "another test");
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}
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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{
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std::wstringbuf buf(L"testing");
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assert(buf.str() == L"testing");
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buf.str(L"another test");
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assert(buf.str() == L"another test");
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}
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#endif
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return 0;
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}
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