signed_char_pointer.pass.cpp [plain text]
#include <ostream>
#include <cassert>
template <class CharT>
class testbuf
: public std::basic_streambuf<CharT>
{
typedef std::basic_streambuf<CharT> base;
std::basic_string<CharT> str_;
public:
testbuf()
{
}
std::basic_string<CharT> str() const
{return std::basic_string<CharT>(base::pbase(), base::pptr());}
protected:
virtual typename base::int_type
overflow(typename base::int_type __c = base::traits_type::eof())
{
if (__c != base::traits_type::eof())
{
int n = str_.size();
str_.push_back(__c);
str_.resize(str_.capacity());
base::setp(const_cast<CharT*>(str_.data()),
const_cast<CharT*>(str_.data() + str_.size()));
base::pbump(n+1);
}
return __c;
}
};
int main()
{
{
std::ostream os((std::streambuf*)0);
const signed char* c = (const signed char*)"123";
os << c;
assert(os.bad());
assert(os.fail());
}
{
testbuf<char> sb;
std::ostream os(&sb);
const signed char* c = (const signed char*)"123";
os << c;
assert(sb.str() == "123");
}
{
testbuf<char> sb;
std::ostream os(&sb);
os.width(5);
const signed char* c = (const signed char*)"123";
os << c;
assert(sb.str() == " 123");
assert(os.width() == 0);
}
{
testbuf<char> sb;
std::ostream os(&sb);
os.width(5);
left(os);
const signed char* c = (const signed char*)"123";
os << c;
assert(sb.str() == "123 ");
assert(os.width() == 0);
}
}