/*!
 * Copyright 2016 The ANTLR Project. All rights reserved.
 * Licensed under the BSD-3-Clause license. See LICENSE file in the project root for license information.
 */

// ConvertTo-TS run at 2016-10-04T11:26:30.6852565-07:00

import { DecisionEventInfo } from "./DecisionEventInfo";
import { NotNull } from "../Decorators";
import { SimulatorState } from "./SimulatorState";
import { TokenStream } from "../TokenStream";

/**
 * This class represents profiling event information for tracking the lookahead
 * depth required in order to make a prediction.
 *
 * @since 4.3
 */
export class LookaheadEventInfo extends DecisionEventInfo {
	/** 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.
	 */
	public predictedAlt: number;

	/**
	 * Constructs a new instance of the {@link LookaheadEventInfo} class with
	 * the specified detailed lookahead information.
	 *
	 * @param decision The decision number
	 * @param state The final simulator state containing the necessary
	 * information to determine the result of a prediction, or `undefined` if
	 * the final state is not available
	 * @param input The input token stream
	 * @param startIndex The start index for the current prediction
	 * @param stopIndex The index at which the prediction was finally made
	 * @param fullCtx `true` if the current lookahead is part of an LL
	 * prediction; otherwise, `false` if the current lookahead is part of
	 * an SLL prediction
	 */
	constructor(
		decision: number,
		state: SimulatorState | undefined,
		predictedAlt: number,
		@NotNull input: TokenStream,
		startIndex: number,
		stopIndex: number,
		fullCtx: boolean) {

		super(decision, state, input, startIndex, stopIndex, fullCtx);
		this.predictedAlt = predictedAlt;
	}
}