Java Doc for LexicalEnvironment.java in  » Scripting » jscheme » jsint » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » jscheme » jsint   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    jsint.LexicalEnvironment LexicalEnvironment public class LexicalEnvironment implements java.io.Serializable(Code) Environments store mappings from symbols to locations. At compile time, we can lookup to see if a symbol names a location, and at run time we can get or set the value in a location. author:    Peter Norvig, Copyright 1998, peter@norvig.com, license author:    subsequently modified by Jscheme project members author:    licensed under zlib licence (see license.txt) Field Summary final public static  LexicalEnvironment NULLENV      The global environment. Constructor Summary public   LexicalEnvironment(Object vars, Object[] vals, LexicalEnvironment parent)      Create an LexicalEnvironment with local variables and values, and a parent LexicalEnvironment. public   LexicalEnvironment(Object vars, Object[] vals, LexicalEnvironment parent, boolean isNullEnv)      Method Summary public  Object get(LocalVariable var)      Get the value of the LocalVariable in this LexicalEnvironment. public  LocalVariable lookup(Symbol var)      public  LocalVariable lookup(Symbol var, int up, int in, Object vars)      Lookup the symbol in the environment. public  Object set(LocalVariable var, Object newVal)      Set the value of the LocalVariable in this LexicalEnvironment to a new value. public  void show(java.io.PrintWriter s)      public  String toString()       LexicalEnvironment up(int levels)      Go up a specified number of levels in the parent chain. Field Detail NULLENV final public static LexicalEnvironment NULLENV(Code) The global environment. All info is in the Symbols themselves. * Constructor Detail LexicalEnvironment public LexicalEnvironment(Object vars, Object[] vals, LexicalEnvironment parent)(Code) Create an LexicalEnvironment with local variables and values, and a parent LexicalEnvironment. LexicalEnvironment public LexicalEnvironment(Object vars, Object[] vals, LexicalEnvironment parent, boolean isNullEnv)(Code) Method Detail get public Object get(LocalVariable var)(Code) Get the value of the LocalVariable in this LexicalEnvironment. * lookup public LocalVariable lookup(Symbol var)(Code) lookup public LocalVariable lookup(Symbol var, int up, int in, Object vars)(Code) Lookup the symbol in the environment. Return either a LocalVariable a Symbol representing the global variable. set public Object set(LocalVariable var, Object newVal)(Code) Set the value of the LocalVariable in this LexicalEnvironment to a new value. show public void show(java.io.PrintWriter s)(Code) toString public String toString()(Code) up LexicalEnvironment up(int levels)(Code) Go up a specified number of levels in the parent chain. * Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)