ix.util.lisp
Class Interpreter.VarRef

java.lang.Object
  ix.util.lisp.Interpreter.Expr
      ix.util.lisp.Interpreter.VarRef

Direct Known Subclasses:

Interpreter.Assignment

Enclosing class:

Interpreter

public static class Interpreter.VarRef
extends Interpreter.Expr

A reference to a variable. The value of this expression is the value bound to the variable by the environment this expression is evaluated in.

Field Summary

(package private) int	over
(package private) int	up
(package private) Symbol	var

Fields inherited from class ix.util.lisp.Interpreter.Expr

description

Constructor Summary

Interpreter.VarRef(Symbol var)

Method Summary

protected java.lang.Object	_evalIn(Interpreter.Env env) Implements this expression's semantics.
java.lang.Object	evalIn(Interpreter.Env env) Provides public access to this expression's semantics.
Expression	externalForm() Returns a representation of this expression that can be understood by the reflection and XML utilities.

Methods inherited from class ix.util.lisp.Interpreter.Expr

evalArgs, externalForm, makeExprArray, makeVarArray, setDescription, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

var

Symbol var

up

int up

over

int over

Constructor Detail

Interpreter.VarRef

public Interpreter.VarRef(Symbol var)

Method Detail

evalIn

public java.lang.Object evalIn(Interpreter.Env env)

Description copied from class: Interpreter.Expr

Provides public access to this expression's semantics. This method typically wraps some debugging support around a call to Interpreter.Expr._evalIn(Interpreter.Env).

Overrides:

evalIn in class Interpreter.Expr

_evalIn

protected java.lang.Object _evalIn(Interpreter.Env env)

Description copied from class: Interpreter.Expr

Implements this expression's semantics.

Note that this method is usually not called directly. Instead, call Interpreter.Expr.evalIn(Interpreter.Env).

Specified by:

_evalIn in class Interpreter.Expr

externalForm

public Expression externalForm()

Description copied from class: Interpreter.Expr

Returns a representation of this expression that can be understood by the reflection and XML utilities.

Specified by:

externalForm in class Interpreter.Expr

See Also:

IScript