org.serversass.ast

Interface Expression

All Known Implementing Classes:

Color, FunctionCall, MediaFilter, NamedParameter, Number, Operation, Value, ValueList, VariableReference

public interface Expression

Base class for all AST classes

Method Summary

Modifier and Type	Method and Description
Expression	eval(Scope scope, Generator gen) If possible the expression is evaluated and a simplified expression is returned.
boolean	isConstant() Determines if this expression is constant or if it depends on variables.

Method Detail

isConstant

boolean isConstant()

Determines if this expression is constant or if it depends on variables.

Returns:

true if the expression is constant, false otherwise

eval

Expression eval(Scope scope,
                Generator gen)

If possible the expression is evaluated and a simplified expression is returned.

Parameters:

scope - the scope used to resolve variables.

gen - the generator used to evaluate functions

Returns:

a possibly simplified version of the expression