Bool3 Class Reference

A type for SQL-like 3-valued Booleans: true/false/unknown. More...

#include <item.h>

Public Member Functions
bool	is_true () const
bool	is_unknown () const
bool	is_false () const

Static Public Member Functions
static const Bool3	false3 ()
static const Bool3	unknown3 ()
static const Bool3	true3 ()

Private Types
enum	value { v_FALSE , v_UNKNOWN , v_TRUE }

Private Member Functions
	Bool3 (value v)
	This is private; instead, use false3()/etc. More...

Private Attributes
value	m_val

Detailed Description

A type for SQL-like 3-valued Booleans: true/false/unknown.

Member Enumeration Documentation

value

enum Bool3::value

private

Enumerator
v_FALSE
v_UNKNOWN
v_TRUE

Constructor & Destructor Documentation

Bool3()

Bool3::Bool3 ( value  v )

inlineprivate

This is private; instead, use false3()/etc.

Member Function Documentation

false3()

static const Bool3 Bool3::false3 ( )

inlinestatic

Returns

an instance set to "FALSE"

is_false()

bool Bool3::is_false ( ) const

inline

is_true()

bool Bool3::is_true ( ) const

inline

is_unknown()

bool Bool3::is_unknown ( ) const

inline

true3()

static const Bool3 Bool3::true3 ( )

inlinestatic

Returns

an instance set to "TRUE"

unknown3()

static const Bool3 Bool3::unknown3 ( )

inlinestatic

Returns

an instance set to "UNKNOWN"

Member Data Documentation

m_val

value Bool3::m_val

private

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

• sql/item.h