stream_extract.pass.cpp
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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <string>
// template<class charT, class traits, class Allocator>
// basic_istream<charT,traits>&
// operator>>(basic_istream<charT,traits>& is,
// basic_string<charT,traits,Allocator>& str);
#include <string>
#include <sstream>
#include <cassert>
#include "min_allocator.h"
#include "test_macros.h"
int main(int, char**)
{
{
std::istringstream in("a bc defghij");
std::string s("initial text");
in >> s;
assert(in.good());
assert(s == "a");
assert(in.peek() == ' ');
in >> s;
assert(in.good());
assert(s == "bc");
assert(in.peek() == ' ');
in.width(3);
in >> s;
assert(in.good());
assert(s == "def");
assert(in.peek() == 'g');
in >> s;
assert(in.eof());
assert(s == "ghij");
in >> s;
assert(in.fail());
}
{
std::wistringstream in(L"a bc defghij");
std::wstring s(L"initial text");
in >> s;
assert(in.good());
assert(s == L"a");
assert(in.peek() == L' ');
in >> s;
assert(in.good());
assert(s == L"bc");
assert(in.peek() == L' ');
in.width(3);
in >> s;
assert(in.good());
assert(s == L"def");
assert(in.peek() == L'g');
in >> s;
assert(in.eof());
assert(s == L"ghij");
in >> s;
assert(in.fail());
}
#ifndef TEST_HAS_NO_EXCEPTIONS
{
std::stringbuf sb;
std::istream is(&sb);
is.exceptions(std::ios::failbit);
bool threw = false;
try {
std::string s;
is >> s;
} catch (std::ios::failure const&) {
threw = true;
}
assert(!is.bad());
assert(is.fail());
assert(is.eof());
assert(threw);
}
{
std::stringbuf sb;
std::istream is(&sb);
is.exceptions(std::ios::eofbit);
bool threw = false;
try {
std::string s;
is >> s;
} catch (std::ios::failure const&) {
threw = true;
}
assert(!is.bad());
assert(is.fail());
assert(is.eof());
assert(threw);
}
#endif // TEST_HAS_NO_EXCEPTIONS
#if TEST_STD_VER >= 11
{
typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
std::istringstream in("a bc defghij");
S s("initial text");
in >> s;
assert(in.good());
assert(s == "a");
assert(in.peek() == ' ');
in >> s;
assert(in.good());
assert(s == "bc");
assert(in.peek() == ' ');
in.width(3);
in >> s;
assert(in.good());
assert(s == "def");
assert(in.peek() == 'g');
in >> s;
assert(in.eof());
assert(s == "ghij");
in >> s;
assert(in.fail());
}
{
typedef std::basic_string<wchar_t, std::char_traits<wchar_t>, min_allocator<wchar_t>> S;
std::wistringstream in(L"a bc defghij");
S s(L"initial text");
in >> s;
assert(in.good());
assert(s == L"a");
assert(in.peek() == L' ');
in >> s;
assert(in.good());
assert(s == L"bc");
assert(in.peek() == L' ');
in.width(3);
in >> s;
assert(in.good());
assert(s == L"def");
assert(in.peek() == L'g');
in >> s;
assert(in.eof());
assert(s == L"ghij");
in >> s;
assert(in.fail());
}
#endif
return 0;
}