forked from OSchip/llvm-project
118 lines
2.7 KiB
C++
118 lines
2.7 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <istream>
|
|
|
|
// template <class charT, class traits>
|
|
// basic_istream<charT,traits>&
|
|
// ws(basic_istream<charT,traits>& is);
|
|
|
|
#include <istream>
|
|
#include <cassert>
|
|
#include "test_macros.h"
|
|
|
|
template <class CharT>
|
|
struct testbuf
|
|
: public std::basic_streambuf<CharT>
|
|
{
|
|
typedef std::basic_string<CharT> string_type;
|
|
typedef std::basic_streambuf<CharT> base;
|
|
private:
|
|
string_type str_;
|
|
public:
|
|
|
|
testbuf() {}
|
|
testbuf(const string_type& str)
|
|
: str_(str)
|
|
{
|
|
base::setg(const_cast<CharT*>(str_.data()),
|
|
const_cast<CharT*>(str_.data()),
|
|
const_cast<CharT*>(str_.data()) + str_.size());
|
|
}
|
|
|
|
CharT* eback() const {return base::eback();}
|
|
CharT* gptr() const {return base::gptr();}
|
|
CharT* egptr() const {return base::egptr();}
|
|
};
|
|
|
|
int main(int, char**)
|
|
{
|
|
{
|
|
testbuf<char> sb(" 123");
|
|
std::istream is(&sb);
|
|
ws(is);
|
|
assert(is.good());
|
|
assert(is.peek() == '1');
|
|
}
|
|
{
|
|
testbuf<wchar_t> sb(L" 123");
|
|
std::wistream is(&sb);
|
|
ws(is);
|
|
assert(is.good());
|
|
assert(is.peek() == L'1');
|
|
}
|
|
{
|
|
testbuf<char> sb(" ");
|
|
std::istream is(&sb);
|
|
ws(is);
|
|
assert(!is.fail());
|
|
assert(is.eof());
|
|
ws(is);
|
|
assert(is.eof());
|
|
assert(is.fail());
|
|
}
|
|
{
|
|
testbuf<wchar_t> sb(L" ");
|
|
std::wistream is(&sb);
|
|
ws(is);
|
|
assert(!is.fail());
|
|
assert(is.eof());
|
|
ws(is);
|
|
assert(is.eof());
|
|
assert(is.fail());
|
|
}
|
|
#ifndef TEST_HAS_NO_EXCEPTIONS
|
|
{
|
|
testbuf<char> sb(" ");
|
|
std::basic_istream<char> is(&sb);
|
|
is.exceptions(std::ios_base::eofbit);
|
|
|
|
bool threw = false;
|
|
try {
|
|
std::ws(is);
|
|
} catch (std::ios_base::failure const&) {
|
|
threw = true;
|
|
}
|
|
|
|
assert(!is.bad());
|
|
assert(!is.fail());
|
|
assert( is.eof());
|
|
assert(threw);
|
|
}
|
|
{
|
|
testbuf<wchar_t> sb(L" ");
|
|
std::basic_istream<wchar_t> is(&sb);
|
|
is.exceptions(std::ios_base::eofbit);
|
|
|
|
bool threw = false;
|
|
try {
|
|
std::ws(is);
|
|
} catch (std::ios_base::failure const&) {
|
|
threw = true;
|
|
}
|
|
|
|
assert(!is.bad());
|
|
assert(!is.fail());
|
|
assert( is.eof());
|
|
assert(threw);
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|