63 lines
2.8 KiB
C++
63 lines
2.8 KiB
C++
/* 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 semantic predicate
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/// evaluations which occur during prediction.
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/// </summary>
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/// <seealso cref= ParserATNSimulator#evalSemanticContext
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///
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/// @since 4.3 </seealso>
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class ANTLR4CPP_PUBLIC PredicateEvalInfo : public DecisionEventInfo {
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public:
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/// The semantic context which was evaluated.
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const Ref<SemanticContext> semctx;
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/// <summary>
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/// The alternative number for the decision which is guarded by the semantic
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/// context <seealso cref="#semctx"/>. Note that other ATN
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/// configurations may predict the same alternative which are guarded by
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/// other semantic contexts and/or <seealso cref="SemanticContext#NONE"/>.
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/// </summary>
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const size_t predictedAlt;
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/// The result of evaluating the semantic context <seealso cref="#semctx"/>.
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const bool evalResult;
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/// <summary>
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/// Constructs a new instance of the <seealso cref="PredicateEvalInfo"/> class with the
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/// specified detailed predicate evaluation information.
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/// </summary>
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/// <param name="decision"> The decision number </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 predicate evaluation was
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/// triggered. Note that the input stream may be reset to other positions for
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/// the actual evaluation of individual predicates. </param>
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/// <param name="semctx"> The semantic context which was evaluated </param>
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/// <param name="evalResult"> The results of evaluating the semantic context </param>
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/// <param name="predictedAlt"> The alternative number for the decision which is
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/// guarded by the semantic context {@code semctx}. See <seealso cref="#predictedAlt"/>
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/// for more information. </param>
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/// <param name="fullCtx"> {@code true} if the semantic context was
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/// evaluated during LL prediction; otherwise, {@code false} if the semantic
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/// context was evaluated during SLL prediction
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/// </param>
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/// <seealso cref= ParserATNSimulator#evalSemanticContext(SemanticContext, ParserRuleContext, int, boolean) </seealso>
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/// <seealso cref= SemanticContext#eval(Recognizer, RuleContext) </seealso>
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PredicateEvalInfo(size_t decision, TokenStream *input, size_t startIndex, size_t stopIndex,
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Ref<SemanticContext> const& semctx, bool evalResult, size_t predictedAlt, bool fullCtx);
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};
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} // namespace atn
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} // namespace antlr4
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