Filter< SRC > Class Template Reference

#include "lib/iter-explorer.hpp"

Description

template<class SRC>
class lib::iter_explorer::Filter< SRC >

Decorator for IterExplorer to filter elements based on a predicate. Similar to the Transformer, the given functor is adapted as appropriate. However, we require the functor's result type to be convertible to bool, to serve as approval test. The filter predicate and thus the source iterator is evaluated eagerly, to establish the invariant of this class: if a "current element" exists, it has already been approved.

Definition at line 1114 of file iter-explorer.hpp.

Public Member Functions
template<typename FUN >
	Filter (SRC &&dataSrc, FUN &&filterFun)
bool	checkPoint () const
void	expandChildren ()
	refresh state when other layers manipulate the source sequence. More...
void	iterNext ()
SRC::reference	yield () const

Protected Types
using	FilterPredicate = function< bool(SRC &)>

Protected Member Functions
bool	isDisabled () const
void	pullFilter ()
SRC &	srcIter () const

Protected Attributes
FilterPredicate	predicate_

Member Function Documentation

expandChildren()

void expandChildren ( )

inline

refresh state when other layers manipulate the source sequence.

Note

possibly pulls to re-establish the invariant

Definition at line 1141 of file iter-explorer.hpp.

pullFilter()

void pullFilter ( )

inlineprotected

Note

establishes the invariant: whatever the source yields as current element, has already been approved by our predicate

Definition at line 1186 of file iter-explorer.hpp.

Inheritance diagram for Filter< SRC >:

Collaboration diagram for Filter< SRC >:

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

• iter-explorer.hpp