eagine::tribool Class Reference

Tri-state boolean value. More...

#include <eagine/tribool.hpp>

Public Member Functions
constexpr	tribool () noexcept=default
	Default constructor.
constexpr	tribool (bool value) noexcept
	Constructions from boolean value.
constexpr	tribool (indeterminate_t) noexcept
	Constructions from indeterminate value.
constexpr	tribool (bool value, bool is_unknown) noexcept
	Construction with separate true/false, known/unknown arguments.
constexpr	operator bool () const noexcept
	Returns true, if the stored value is true.
constexpr auto	operator! () const noexcept
	Returns true, if the stored value is false.
constexpr auto	operator* () const noexcept -> bool
	Returns true, if the stored value is indeterminate.
constexpr auto	operator~ () const noexcept -> weakbool
	Converts this value to weakbool.
constexpr auto	is (bool value) const noexcept -> bool
	Returns true if the stored value is known and equal to value.
constexpr auto	is (indeterminate_t) const noexcept -> bool
	Returns true if the stored value is indeterminate.

Friends
constexpr friend auto	operator== (tribool a, tribool b) noexcept -> tribool
	Equality comparison.
constexpr friend auto	operator!= (tribool a, tribool b) noexcept -> tribool
	Non-equality comparison.

Detailed Description

Tri-state boolean value.

See also

weakbool

indeterminate

Examples

eagine/tribool.cpp.

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The documentation for this class was generated from the following file:

• eagine/tribool.hpp