osmscout::TagBoolCondition Class Reference

Allows a boolean and/or condition between a number of child conditions. More...

#include <Tag.h>

Inheritance diagram for osmscout::TagBoolCondition:

Public Types
enum	Type { boolAnd , boolOr }

Public Member Functions
void	AddCondition (const TagConditionRef &condition)
void	CollectTagKeys (std::vector< TagId > &keys, bool &guaranteed) const override
	Collects the tag keys that act as primary discriminators for this condition.
void	CollectTagValues (std::vector< TagValue > &values, bool &exhaustive) const override
	Collects the (tag,value) pairs this condition can match for.
bool	Evaluate (const TagMap &tagMap) const override
	TagBoolCondition (Type type)
Public Member Functions inherited from osmscout::TagCondition
virtual	~TagCondition ()=default

Detailed Description

Allows a boolean and/or condition between a number of child conditions.

Member Enumeration Documentation

Type

enum osmscout::TagBoolCondition::Type

Enumerator
boolAnd
boolOr

Constructor & Destructor Documentation

TagBoolCondition()

osmscout::TagBoolCondition::TagBoolCondition ( Type  type )

explicit

Member Function Documentation

AddCondition()

void osmscout::TagBoolCondition::AddCondition

(

const TagConditionRef &

condition

)

CollectTagKeys()

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

overridevirtual

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.

References boolAnd, and boolOr.

CollectTagValues()

void osmscout::TagBoolCondition::CollectTagValues ( std::vector< TagValue > &  values, bool &  exhaustive  ) const

overridevirtual

Collects the (tag,value) pairs this condition can match for.

If 'exhaustive' is true, the condition cannot evaluate to true unless the tag map carries at least one of the returned (tag,value) pairs, i.e. the returned pairs are a conservative superset of the values that can make it match. If 'exhaustive' is false, the condition may match for a value that is not listed (e.g. an existence, ordering or negated condition) and has to be evaluated for every object that carries one of its keys.

The default reports no pairs and is not exhaustive, which is always safe.

Reimplemented from osmscout::TagCondition.

References boolAnd, and boolOr.

Evaluate()

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

overridevirtual

Implements osmscout::TagCondition.

References boolAnd, and boolOr.

---

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

• Tag.h
• Tag.cpp