48 lines
2.1 KiB
C
48 lines
2.1 KiB
C
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/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
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* Use of this file is governed by the BSD 3-clause license that
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* can be found in the LICENSE.txt file in the project root.
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*/
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#pragma once
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#include "atn/DecisionEventInfo.h"
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namespace antlr4 {
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namespace atn {
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/// <summary>
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/// This class represents profiling event information for a context sensitivity.
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/// Context sensitivities are decisions where a particular input resulted in an
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/// SLL conflict, but LL prediction produced a single unique alternative.
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///
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/// <para>
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/// In some cases, the unique alternative identified by LL prediction is not
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/// equal to the minimum represented alternative in the conflicting SLL
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/// configuration set. Grammars and inputs which result in this scenario are
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/// unable to use <seealso cref="PredictionMode#SLL"/>, which in turn means they cannot use
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/// the two-stage parsing strategy to improve parsing performance for that
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/// input.</para>
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/// </summary>
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/// <seealso cref= ParserATNSimulator#reportContextSensitivity </seealso>
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/// <seealso cref= ANTLRErrorListener#reportContextSensitivity
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///
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/// @since 4.3 </seealso>
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class ANTLR4CPP_PUBLIC ContextSensitivityInfo : public DecisionEventInfo {
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public:
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/// <summary>
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/// Constructs a new instance of the <seealso cref="ContextSensitivityInfo"/> class
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/// with the specified detailed context sensitivity information.
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/// </summary>
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/// <param name="decision"> The decision number </param>
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/// <param name="configs"> The final configuration set containing the unique
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/// alternative identified by full-context prediction </param>
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/// <param name="input"> The input token stream </param>
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/// <param name="startIndex"> The start index for the current prediction </param>
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/// <param name="stopIndex"> The index at which the context sensitivity was
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/// identified during full-context prediction </param>
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ContextSensitivityInfo(size_t decision, ATNConfigSet *configs, TokenStream *input, size_t startIndex, size_t stopIndex);
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};
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} // namespace atn
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} // namespace antlr4
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