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/* 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.
*/
#pragma once
#include "atn/DecisionEventInfo.h"
namespace antlr4 {
namespace atn {
/// This class represents profiling event information for tracking the lookahead
/// depth required in order to make a prediction.
class ANTLR4CPP_PUBLIC LookaheadEventInfo : public DecisionEventInfo {
public:
/// The alternative chosen by adaptivePredict(), not necessarily
/// the outermost alt shown for a rule; left-recursive rules have
/// user-level alts that differ from the rewritten rule with a (...) block
/// and a (..)* loop.
size_t predictedAlt = 0;
/// <summary>
/// Constructs a new instance of the <seealso cref="LookaheadEventInfo"/> class with
/// the specified detailed lookahead information.
/// </summary>
/// <param name="decision"> The decision number </param>
/// <param name="configs"> The final configuration set containing the necessary
/// information to determine the result of a prediction, or {@code null} if
/// the final configuration set is not available </param>
/// <param name="input"> The input token stream </param>
/// <param name="startIndex"> The start index for the current prediction </param>
/// <param name="stopIndex"> The index at which the prediction was finally made </param>
/// <param name="fullCtx"> {@code true} if the current lookahead is part of an LL
/// prediction; otherwise, {@code false} if the current lookahead is part of
/// an SLL prediction </param>
LookaheadEventInfo(size_t decision, ATNConfigSet *configs, size_t predictedAlt, TokenStream *input, size_t startIndex,
size_t stopIndex, bool fullCtx);
};
} // namespace atn
} // namespace antlr4
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