104 lines
2.5 KiB
C++
104 lines
2.5 KiB
C++
|
//===----------------------------------------------------------------------===//
|
|||
|
|
//
|
|||
|
|
// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
|
|||
|
|
//
|
|||
|
|
// This file is distributed under the University of Illinois Open Source
|
|||
|
|
// License. See LICENSE.TXT for details.
|
|||
|
|
//
|
|||
|
|
//===----------------------------------------------------------------------===//
|
|||
|
|
|
|||
|
|
// <istream>
|
|||
|
|
|
|||
|
|
// basic_istream<charT,traits>& get(char_type& c);
|
|||
|
|
|
|||
|
|
#include <istream>
|
|||
|
|
#include <cassert>
|
|||
|
|
|
|||
|
|
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()
|
|||
|
|
{
|
|||
|
|
{
|
|||
|
|
testbuf<char> sb(" ");
|
|||
|
|
std::istream is(&sb);
|
|||
|
|
char c;
|
|||
|
|
is.get(c);
|
|||
|
|
assert(!is.eof());
|
|||
|
|
assert(!is.fail());
|
|||
|
|
assert(c == ' ');
|
|||
|
|
assert(is.gcount() == 1);
|
|||
|
|
}
|
|||
|
|
{
|
|||
|
|
testbuf<char> sb(" abc");
|
|||
|
|
std::istream is(&sb);
|
|||
|
|
char c;
|
|||
|
|
is.get(c);
|
|||
|
|
assert(!is.eof());
|
|||
|
|
assert(!is.fail());
|
|||
|
|
assert(c == ' ');
|
|||
|
|
assert(is.gcount() == 1);
|
|||
|
|
is.get(c);
|
|||
|
|
assert(!is.eof());
|
|||
|
|
assert(!is.fail());
|
|||
|
|
assert(c == 'a');
|
|||
|
|
assert(is.gcount() == 1);
|
|||
|
|
is.get(c);
|
|||
|
|
assert(!is.eof());
|
|||
|
|
assert(!is.fail());
|
|||
|
|
assert(c == 'b');
|
|||
|
|
assert(is.gcount() == 1);
|
|||
|
|
is.get(c);
|
|||
|
|
assert( is.eof());
|
|||
|
|
assert(!is.fail());
|
|||
|
|
assert(c == 'c');
|
|||
|
|
assert(is.gcount() == 1);
|
|||
|
|
}
|
|||
|
|
{
|
|||
|
|
testbuf<wchar_t> sb(L" abc");
|
|||
|
|
std::wistream is(&sb);
|
|||
|
|
wchar_t c;
|
|||
|
|
is.get(c);
|
|||
|
|
assert(!is.eof());
|
|||
|
|
assert(!is.fail());
|
|||
|
|
assert(c == L' ');
|
|||
|
|
assert(is.gcount() == 1);
|
|||
|
|
is.get(c);
|
|||
|
|
assert(!is.eof());
|
|||
|
|
assert(!is.fail());
|
|||
|
|
assert(c == L'a');
|
|||
|
|
assert(is.gcount() == 1);
|
|||
|
|
is.get(c);
|
|||
|
|
assert(!is.eof());
|
|||
|
|
assert(!is.fail());
|
|||
|
|
assert(c == L'b');
|
|||
|
|
assert(is.gcount() == 1);
|
|||
|
|
is.get(c);
|
|||
|
|
assert( is.eof());
|
|||
|
|
assert(!is.fail());
|
|||
|
|
assert(c == L'c');
|
|||
|
|
assert(is.gcount() == 1);
|
|||
|
|
}
|
|||
|
|
}
|