ix.util.lisp
Class SafeLispInterpreter

java.lang.Object
  ix.util.lisp.Interpreter
      ix.util.lisp.LispInterpreter
          ix.util.lisp.SafeLispInterpreter

public class SafeLispInterpreter
extends LispInterpreter

A safe interpreter for a simple dialect of Lisp. "Safe" here means that the interpreter doesn't allow user code to do such things as call arbitrary Java methods, read or write files, or get other information about the host machine. Interpreters are unsafe by default. Safety is implemented by leaving out built-in functions that perform unsafe operations. It is up to the implementor of an Interpreter.JFunction to indicate that it is unsafe by defining it's isSafe() method to return false.

See Also:

Interpreter.isSafe(), Interpreter.acceptOnlySafeBuiltins, LispInterpreter.LispInterpreter(boolean beSafe)

Nested Class Summary

Nested classes/interfaces inherited from class ix.util.lisp.LispInterpreter

LispInterpreter.JavaNull, LispInterpreter.Parser, LispInterpreter.Syntax, LispInterpreter.SyntaxError

Nested classes/interfaces inherited from class ix.util.lisp.Interpreter

Interpreter.AbstractEnv, Interpreter.AbstractFunction, Interpreter.And, Interpreter.Assignment, Interpreter.Call, Interpreter.Closure, Interpreter.Env, Interpreter.Error, Interpreter.Expr, Interpreter.Function, Interpreter.GlobalEnv, Interpreter.If, Interpreter.JFunction, Interpreter.Lambda, Interpreter.Let, Interpreter.LexicalEnv, Interpreter.Literal, Interpreter.Or, Interpreter.Sequence, Interpreter.VarRef, Interpreter.While

Field Summary

Fields inherited from class ix.util.lisp.LispInterpreter

COND, ELLIPSIS, JAVA_NULL, LAMBDA, parserTable, PROGN, QUOTE, reader

Fields inherited from class ix.util.lisp.Interpreter

acceptOnlySafeBuiltins, DEFAULT, FALSE, globalEnv, iscript, TRUE

Constructor Summary

SafeLispInterpreter()

Method Summary

static void

main(java.lang.String[] argv)

Methods inherited from class ix.util.lisp.LispInterpreter

define, define, define, defineBuiltins, defineInitialValues, defineSyntax, installDefinitions, isTrue, loadLisp, loadLisp, parseForm, parseList, readEvalPrintLoop, topLevelEval

Methods inherited from class ix.util.lisp.Interpreter

isSafe, nameForClass, topLevelApply, topLevelEval

Methods inherited from class java.lang.Object

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

Constructor Detail

SafeLispInterpreter

public SafeLispInterpreter()

Method Detail

main

public static void main(java.lang.String[] argv)