juce::Expression::Scope Class Reference

When evaluating an Expression object, this class is used to resolve symbols and perform functions that the expression uses. More...

#include "juce_Expression.h"

Inheritance diagram for juce::Expression::Scope:

Classes
class	Visitor
	Used as a callback by the Scope::visitRelativeScope() method. More...

Public Member Functions
virtual String	getScopeUID () const
	Returns some kind of globally unique ID that identifies this scope.
virtual Expression	getSymbolValue (const String &symbol) const
	Returns the value of a symbol.
virtual double	evaluateFunction (const String &functionName, const double *parameters, int numParameters) const
	Executes a named function.
virtual void	visitRelativeScope (const String &scopeName, Visitor &visitor) const
	Creates a Scope object for a named scope, and then calls a visitor to do some kind of processing with this new scope.

Detailed Description

When evaluating an Expression object, this class is used to resolve symbols and perform functions that the expression uses.

Definition at line 108 of file juce_Expression.h.

Constructor & Destructor Documentation

Scope()

juce::Expression::Scope::Scope

(

)

Definition at line 1119 of file juce_Expression.cpp.

~Scope()

juce::Expression::Scope::~Scope ( )

virtual

Definition at line 1120 of file juce_Expression.cpp.

Member Function Documentation

evaluateFunction()

double juce::Expression::Scope::evaluateFunction ( const String &  functionName, const double *  parameters, int  numParameters  ) const

virtual

Executes a named function.

If the function name is unknown, this can throw an Expression::EvaluationError exception.

Exceptions

Expression::EvaluationError

Definition at line 1130 of file juce_Expression.cpp.

getScopeUID()

String juce::Expression::Scope::getScopeUID ( ) const

virtual

Returns some kind of globally unique ID that identifies this scope.

Reimplemented in juce::MarkerListScope, and juce::RelativeCoordinatePositionerBase::ComponentScope.

Definition at line 1169 of file juce_Expression.cpp.

getSymbolValue()

Expression juce::Expression::Scope::getSymbolValue ( const String &  symbol ) const

virtual

Returns the value of a symbol.

If the symbol is unknown, this can throw an Expression::EvaluationError exception. The member value is set to the part of the symbol that followed the dot, if there is one, e.g. for "foo.bar", symbol = "foo" and member = "bar".

Exceptions

Expression::EvaluationError

Reimplemented in juce::MarkerListScope, juce::RelativeCoordinatePositionerBase::DependencyFinderScope, juce::RelativeCoordinatePositionerBase::ComponentScope, and juce::RelativeRectangleLocalScope.

Definition at line 1122 of file juce_Expression.cpp.

visitRelativeScope()

void juce::Expression::Scope::visitRelativeScope ( const String &  scopeName, Visitor &  visitor  ) const

virtual

Creates a Scope object for a named scope, and then calls a visitor to do some kind of processing with this new scope.

If the name is valid, this method must create a suitable (temporary) Scope object to represent it, and must call the Visitor::visit() method with this new scope.

Reimplemented in juce::RelativeCoordinatePositionerBase::ComponentScope, juce::MarkerListScope, and juce::RelativeCoordinatePositionerBase::DependencyFinderScope.

Definition at line 1164 of file juce_Expression.cpp.

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

• juce_core/maths/juce_Expression.h
• juce_core/maths/juce_Expression.cpp