beaver

Class Parser.Simulator

java.lang.Object

beaver.Parser.Simulator

Enclosing class:

Parser

public class Parser.Simulator
extends Object

Simulator is a stripped (of action code) version of a parser that will try to parse ahead token stream after a syntax error. The simulation is considered successful if 3 tokens were shifted successfully. If during simulation this parser encounters an error it drops the first token it tried to use and restarts the simulated parsing.

Note: Without a special "error" rule present in a grammar, which a parser will try to shift at the beginning of an error recovery, simulation continues without removing anything from the original states stack. This often will lead to cases when no parsing ahead will recover the parser from a syntax error.

Constructor Summary

Constructors

Constructor and Description
Simulator()

Method Summary

Modifier and Type	Method and Description
boolean	parse(Parser.TokenStream in)

Methods inherited from class java.lang.Object

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

Constructor Detail

Simulator

public Simulator()

Method Detail

parse

public boolean parse(Parser.TokenStream in)
              throws IOException

Throws:

IOException