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The ANTLR 4 grammar compiler.
/* Copyright (c) 2012 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD-3-Clause license that
* can be found in the LICENSE.txt file in the project root.
*/
package org.antlr.v4.runtime.dfa;
import org.antlr.v4.runtime.atn.LexerActionExecutor;
import org.antlr.v4.runtime.atn.ParserATNSimulator;
/**
* Stores information about a {@link DFAState} which is an accept state under
* some condition. Certain settings, such as
* {@link ParserATNSimulator#getPredictionMode()}, may be used in addition to
* this information to determine whether or not a particular state is an accept
* state.
*
* @author Sam Harwell
*/
public class AcceptStateInfo {
private final int prediction;
private final LexerActionExecutor lexerActionExecutor;
public AcceptStateInfo(int prediction) {
this.prediction = prediction;
this.lexerActionExecutor = null;
}
public AcceptStateInfo(int prediction, LexerActionExecutor lexerActionExecutor) {
this.prediction = prediction;
this.lexerActionExecutor = lexerActionExecutor;
}
/**
* Gets the prediction made by this accept state. Note that this value
* assumes the predicates, if any, in the {@link DFAState} evaluate to
* {@code true}. If predicate evaluation is enabled, the final prediction of
* the accept state will be determined by the result of predicate
* evaluation.
*/
public int getPrediction() {
return prediction;
}
/**
* Gets the {@link LexerActionExecutor} which can be used to execute actions
* and/or commands after the lexer matches a token.
*/
public LexerActionExecutor getLexerActionExecutor() {
return lexerActionExecutor;
}
}