![]() |
Home | Libraries | People | FAQ | More |
boost::logic::tribool — A 3-state boolean type.
// In header: <boost/logic/tribool.hpp> class tribool { public: enum value_t; // construct/copy/destruct () ; (bool) ; () ; // public member functions BOOST_CONSTEXPR () ; // public data members enum value; };
3-state boolean values are either true, false, or indeterminate.
tribool
public
construct/copy/destruct() ;
Construct a new 3-state boolean value with the value 'false'.
Throws: |
Will not throw. |
(bool initial_value) ;
Construct a new 3-state boolean value with the given boolean value, which may be true
or false
.
Throws: |
Will not throw. |
() ;
Construct a new 3-state boolean value with an indeterminate value.
Throws: |
Will not throw. |