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• ContextSensitivityInfo.kt

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commonMain.org.antlr.v4.kotlinruntime.atn.ContextSensitivityInfo.kt 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.kotlinruntime.atn

import org.antlr.v4.kotlinruntime.ANTLRErrorListener
import org.antlr.v4.kotlinruntime.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 [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
 */
class ContextSensitivityInfo
/**
 * Constructs a new instance of the [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
 */
(decision: Int,
 configs: ATNConfigSet,
 input: TokenStream, startIndex: Int, stopIndex: Int) : DecisionEventInfo(decision, configs, input, startIndex, stopIndex, true)