All Downloads are FREE. Search and download functionalities are using the official Maven repository.

org.antlr.v4.runtime.atn.ContextSensitivityInfo Maven / Gradle / Ivy

/*
 * Copyright (c) 2012-2017 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.atn;

import org.antlr.v4.runtime.ANTLRErrorListener;
import org.antlr.v4.runtime.TokenStream;

/**
 * This class represents profiling event information for a context sensitivity.
 * Context sensitivities are decisions where a particular input resulted in an
 * SLL conflict, but LL prediction produced a single unique alternative.
 *
 * 

* In some cases, the unique alternative identified by LL prediction is not * equal to the minimum represented alternative in the conflicting SLL * configuration set. Grammars and inputs which result in this scenario are * unable to use {@link PredictionMode#SLL}, which in turn means they cannot use * the two-stage parsing strategy to improve parsing performance for that * input.

* * @see ParserATNSimulator#reportContextSensitivity * @see ANTLRErrorListener#reportContextSensitivity * * @since 4.3 */ public class ContextSensitivityInfo extends DecisionEventInfo { /** * Constructs a new instance of the {@link ContextSensitivityInfo} class * with the specified detailed context sensitivity information. * * @param decision The decision number * @param configs The final configuration set containing the unique * alternative identified by full-context prediction * @param input The input token stream * @param startIndex The start index for the current prediction * @param stopIndex The index at which the context sensitivity was * identified during full-context prediction */ public ContextSensitivityInfo(int decision, ATNConfigSet configs, TokenStream input, int startIndex, int stopIndex) { super( decision, configs, input, startIndex, stopIndex, true); } }




© 2015 - 2024 Weber Informatics LLC | Privacy Policy