...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::logic::operator<< — Writes the value of a tribool to a stream.
// In header: <boost/logic/tribool_io.hpp> template<typename CharT, typename Traits> std::basic_ostream< CharT, Traits > & operator<<(std::basic_ostream< CharT, Traits > & out, tribool x);
When the value of x
is either true
or false
, this routine is semantically equivalent to:
out << static_cast<bool>(x);
When x
has an indeterminate value, it outputs either the integer value 2 (if (out.flags() & std::ios_base::boolalpha) == 0
) or the name of the indeterminate value. The name of the indeterminate value comes from the indeterminate_name
facet (if it is defined in the output stream's locale), or from the get_default_indeterminate_name function (if it is not defined in the locale or if the C++ standard library implementation does not support locales).
Returns: |
|