Some logical functors to build more complex queries: More...

Classes
struct	zypp::functor::Constant< TConst >

struct	zypp::functor::True
	Logical functor always `true`. More...

struct	zypp::functor::False
	Logical functor always `false`. More...

struct	zypp::functor::Not< TCondition >
	Logical functor inverting TCondition. More...

struct	zypp::functor::Or< TACondition, TBCondition >
	Logical functor chaining TACondition `OR` TBCondition. More...

struct	zypp::functor::Chain< TACondition, TBCondition >
	Logical functor chaining TACondition `AND` TBCondition. More...

Functions
template<class TConst >
Constant< TConst >	zypp::functor::constant (const TConst &value)

True	zypp::functor::true_c ()
	Convenience function for creating a True. More...

False	zypp::functor::false_c ()
	Convenience function for creating a False. More...

template<class TCondition >
Not< TCondition >	zypp::functor::not_c (TCondition cond_r)
	Convenience function for creating a Not from TCondition. More...

template<class TACondition , class TBCondition >
Or< TACondition, TBCondition >	zypp::functor::or_c (TACondition conda_r, TBCondition condb_r)
	Convenience function for creating a Or from two conditions conda_r OR condb_r. More...

template<class TACondition , class TBCondition >
Chain< TACondition, TBCondition >	zypp::functor::chain (TACondition conda_r, TBCondition condb_r)
	Convenience function for creating a Chain from two conditions conda_r and condb_r. More...

Detailed Description

Some logical functors to build more complex queries:

True and False. No supprise, they always return true or false.
Not<TCondition>. TCondition is a functor, and it's result is inverted.
Chain<TACondition,TBCondition>. TACondition and TBCondition are functors, and Chain evaluates TACondition && TBCondition.

As it's no fun to get and write the correct template arguments, convenience functions creating the correct functor are provided.

true_c and false_c. (provided just to match the schema)
not_c. Takes a functor as argument and returns the appropriate Not functor.
chain. Takes two functors and returns the appropriate Cain functor.

struct Print; // functor printing elements
struct Count; // functor counting number of elements
std::for_each( c.begin(), c.end(),
               chain( Print(), Count() ) );

Function Documentation

template<class TConst >

Constant<TConst> zypp::functor::constant ( const TConst & value )

inline

Definition at line 236 of file Functional.h.

True zypp::functor::true_c ( )

inline

Convenience function for creating a True.

Definition at line 250 of file Functional.h.

False zypp::functor::false_c ( )

inline

Convenience function for creating a False.

Definition at line 265 of file Functional.h.

template<class TCondition >

Not<TCondition> zypp::functor::not_c ( TCondition cond_r )

inline

Convenience function for creating a Not from TCondition.

Definition at line 288 of file Functional.h.

template<class TACondition , class TBCondition >

Or<TACondition, TBCondition> zypp::functor::or_c	(	TACondition	conda_r,
		TBCondition	condb_r
	)

inline

Convenience function for creating a Or from two conditions conda_r OR condb_r.

Definition at line 317 of file Functional.h.

template<class TACondition , class TBCondition >

Chain<TACondition, TBCondition> zypp::functor::chain	(	TACondition	conda_r,
		TBCondition	condb_r
	)

inline

Convenience function for creating a Chain from two conditions conda_r and condb_r.

Definition at line 346 of file Functional.h.

Classes

Functions

Detailed Description

Function Documentation