Returns true, if the given tag exists for an object. More...

#include <Tag.h>

Inheritance diagram for osmscout::TagExistsCondition:

Public Member Functions
void	CollectTagKeys (std::vector< TagId > &keys, bool &guaranteed) const override
	Collects the tag keys that act as primary discriminators for this condition.

bool	Evaluate (const TagMap &tagMap) const override

	TagExistsCondition (TagId tag)

Public Member Functions inherited from osmscout::TagCondition
virtual	~TagCondition ()=default

Detailed Description

Returns true, if the given tag exists for an object.

Constructor & Destructor Documentation

◆ TagExistsCondition()

osmscout::TagExistsCondition::TagExistsCondition ( TagId tag )

explicit

Member Function Documentation

◆ CollectTagKeys()

void osmscout::TagExistsCondition::CollectTagKeys	(	std::vector< TagId > &	keys,
		bool &	guaranteed
	)		const

inlineoverridevirtual

Collects the tag keys that act as primary discriminators for this condition.

If 'guaranteed' is true, at least one of the returned keys is guaranteed to be present in the tag map whenever this condition evaluates to true, i.e. the condition can only match objects that carry one of these keys. If 'guaranteed' is false, the condition may evaluate to true even if none of the returned keys is present (e.g. conditions containing negation) and the caller has to always evaluate the condition.

Implements osmscout::TagCondition.

◆ Evaluate()

bool osmscout::TagExistsCondition::Evaluate ( const TagMap & tagMap ) const