| java.lang.Object
 jsint.Evaluator
| Evaluator | | public class Evaluator implements java.io.Serializable(Code) | | This class represents a Scheme interpreter.
author:
Peter Norvig, Copyright 1998, peter@norvig.com, license
author:
subsequently modified by Jscheme project members
author:
licensed under zlib licence (see license.txt) |
| Method Summary | |
| public Object | analyze(Object x, DynamicEnvironment dynamicEnv, LexicalEnvironment lexenv)
Analyze (or preprocess or precompile) an expression into "code".
The code returned is either a Symbol, a LocalVariable, a Closure, or
an array whose first element is either one of (quote if or begin set!)
or is code evaluating to a procedure. | | public void | enableNamedResults(boolean enabled)
| | public Boolean | environmentImport(Object x, Object prefix)
| | public Boolean | environmentImport(Object x, Object prefix, boolean macrosFlag, jsint.Symbol[] procnames)
| | public Object | eval(Object x)
Evaluate an s-expression in the global environment. | | public Object | eval(Object x, Object env)
Evaluate an s-expression in a lexical environment. | | public Object | evalToplevel(Object x, DynamicEnvironment env)
evalToplevel evaluates each element of a BEGIN. | | public Object | execute(Object x, LexicalEnvironment lexenv)
Evaluate analyzed code in a lexical environment. | | public PrintWriter | getError()
| | public DynamicEnvironment | getInitialEnvironment()
| | public InputPort | getInput()
| | public DynamicEnvironment | getInteractionEnvironment()
| | public static DynamicEnvironment | getNullEnvironment()
| | public PrintWriter | getOutput()
| | public void | interrupt(Thread t)
Interrupt execution on thread t. | | public void | interruptCheck()
Maybe interrupt this thread of execution. | | public Boolean | languageImport(Object x)
| | public Object | load(Object fileName)
Eval all the expressions in a file. | | public Object | load(InputPort in)
Eval all the expressions coming from an InputPort, putting them
in the interactionEnvironment. | | public DynamicEnvironment | loadEnvironment(Object x)
load the current object (file or class) into a new Evaluator
and return the resulting Evaluator's DynamicEnvironment. | | public boolean | readEvalWriteLoop(String prompt)
Prompt, read, eval, and write the result.
Also sets up a catch for any RuntimeExceptions encountered.
Returns true on EOF, false if (exit) was evaluated. | | public void | runJscheme()
| | public void | setError(PrintWriter w)
| | public boolean | setExit(boolean exit)
| | public void | setInput(InputPort ip)
| | public void | setOutput(PrintWriter w)
|
| INTERRUPTABLE | | public boolean INTERRUPTABLE(Code) | | Is execution interruptable. *
|
| Evaluator | | public Evaluator()(Code) | | |
| analyze | | public Object analyze(Object x, DynamicEnvironment dynamicEnv, LexicalEnvironment lexenv)(Code) | | Analyze (or preprocess or precompile) an expression into "code".
The code returned is either a Symbol, a LocalVariable, a Closure, or
an array whose first element is either one of (quote if or begin set!)
or is code evaluating to a procedure. *
|
| enableNamedResults | | public void enableNamedResults(boolean enabled)(Code) | | |
| eval | | public Object eval(Object x)(Code) | | Evaluate an s-expression in the global environment. *
|
| evalToplevel | | public Object evalToplevel(Object x, DynamicEnvironment env)(Code) | | evalToplevel evaluates each element of a BEGIN. This is so
macros can be defined and then used. Also toplevel macros can
expand into begin.
|
| execute | | public Object execute(Object x, LexicalEnvironment lexenv)(Code) | | Evaluate analyzed code in a lexical environment. Don't pass this
a raw s-expression; you need to analyze the s-expression
first.
|
| interrupt | | public void interrupt(Thread t)(Code) | | Interrupt execution on thread t. *
|
| interruptCheck | | public void interruptCheck()(Code) | | Maybe interrupt this thread of execution. *
|
| load | | public Object load(Object fileName)(Code) | | Eval all the expressions in a file. Calls load(InputPort). *
|
| load | | public Object load(InputPort in)(Code) | | Eval all the expressions coming from an InputPort, putting them
in the interactionEnvironment. The interactionEnvironment might
have been rebound to a module environment, but we don't care
about that. Returns TRUE on EOF, FALSE if (exit) was evaluated.
|
| loadEnvironment | | public DynamicEnvironment loadEnvironment(Object x)(Code) | | load the current object (file or class) into a new Evaluator
and return the resulting Evaluator's DynamicEnvironment.
|
| readEvalWriteLoop | | public boolean readEvalWriteLoop(String prompt)(Code) | | Prompt, read, eval, and write the result.
Also sets up a catch for any RuntimeExceptions encountered.
Returns true on EOF, false if (exit) was evaluated. *
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| runJscheme | | public void runJscheme()(Code) | | |
| setExit | | public boolean setExit(boolean exit)(Code) | | |
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