ix.util.lisp
Class Interpreter.GlobalEnv

java.lang.Object
  ix.util.lisp.Interpreter.AbstractEnv
      ix.util.lisp.Interpreter.GlobalEnv

All Implemented Interfaces:

Interpreter.Env

Enclosing class:

Interpreter

public class Interpreter.GlobalEnv
extends Interpreter.AbstractEnv

A global / top-level environment.

Field Summary

(package private) java.util.Map

varToValMap

Constructor Summary

Interpreter.GlobalEnv()

Method Summary

java.lang.Object	assign(Interpreter.VarRef ref, java.lang.Object val) Changes the value bound to the variable and then returns the new value.
java.lang.Object	assign(Symbol var, java.lang.Object val)
Interpreter.Env	bind(Symbol[] vars, java.lang.Object[] vals) Returns a new Env in which the variables are bound to the corresponding values.
java.lang.Object	lookup(Interpreter.VarRef ref) Returns the value bound to the variable by this environment.
java.lang.Object	lookup(Symbol var)

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

defaultValue, isTrue

Methods inherited from class java.lang.Object

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

Field Detail

varToValMap

java.util.Map varToValMap

Constructor Detail

Interpreter.GlobalEnv

public Interpreter.GlobalEnv()

Method Detail

lookup

public java.lang.Object lookup(Interpreter.VarRef ref)

Description copied from interface: Interpreter.Env

Returns the value bound to the variable by this environment.

lookup

public java.lang.Object lookup(Symbol var)

bind

public Interpreter.Env bind(Symbol[] vars,
                            java.lang.Object[] vals)

Description copied from interface: Interpreter.Env

Returns a new Env in which the variables are bound to the corresponding values.

assign

public java.lang.Object assign(Interpreter.VarRef ref,
                               java.lang.Object val)

Description copied from interface: Interpreter.Env

Changes the value bound to the variable and then returns the new value. Note that this typically modifies an existing binding relationship rather than create a new one; however, a new one may be created, for instance if the variable is not already bound.

assign

public java.lang.Object assign(Symbol var,
                               java.lang.Object val)