72 lines
2.2 KiB
C++
72 lines
2.2 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_stringstream
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// explicit basic_stringstream(const basic_string<charT,traits,Allocator>& str,
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// ios_base::openmode which = ios_base::out|ios_base::in);
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#include <sstream>
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#include <cassert>
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#include "test_macros.h"
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template<typename T>
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struct NoDefaultAllocator : std::allocator<T>
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{
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template<typename U> struct rebind { using other = NoDefaultAllocator<U>; };
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NoDefaultAllocator(int id_) : id(id_) { }
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template<typename U> NoDefaultAllocator(const NoDefaultAllocator<U>& a) : id(a.id) { }
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int id;
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};
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int main(int, char**)
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{
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{
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std::stringstream ss(" 123 456 ");
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assert(ss.rdbuf() != 0);
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assert(ss.good());
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assert(ss.str() == " 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.str() == "456 1236 ");
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}
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{
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std::wstringstream ss(L" 123 456 ");
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assert(ss.rdbuf() != 0);
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assert(ss.good());
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assert(ss.str() == L" 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.str() == L"456 1236 ");
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}
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{ // This is https://llvm.org/PR33727
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typedef std::basic_string <char, std::char_traits<char>, NoDefaultAllocator<char> > S;
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typedef std::basic_stringbuf<char, std::char_traits<char>, NoDefaultAllocator<char> > SB;
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S s(NoDefaultAllocator<char>(1));
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SB sb(s);
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// This test is not required by the standard, but *where else* could it get the allocator?
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assert(sb.str().get_allocator() == s.get_allocator());
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}
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return 0;
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}
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