55 lines
2.1 KiB
TypeScript
55 lines
2.1 KiB
TypeScript
/*!
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* Copyright 2016 The ANTLR Project. All rights reserved.
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* Licensed under the BSD-3-Clause license. See LICENSE file in the project root for license information.
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*/
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import { SimulatorState } from "./SimulatorState";
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import { TokenStream } from "../TokenStream";
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/**
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* This is the base class for gathering detailed information about prediction
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* events which occur during parsing.
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*
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* Note that we could record the parser call stack at the time this event
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* occurred but in the presence of left recursive rules, the stack is kind of
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* meaningless. It's better to look at the individual configurations for their
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* individual stacks. Of course that is a {@link PredictionContext} object
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* not a parse tree node and so it does not have information about the extent
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* (start...stop) of the various subtrees. Examining the stack tops of all
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* configurations provide the return states for the rule invocations.
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* From there you can get the enclosing rule.
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*
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* @since 4.3
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*/
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export declare class DecisionEventInfo {
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/**
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* The invoked decision number which this event is related to.
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*
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* @see ATN#decisionToState
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*/
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decision: number;
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/**
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* The simulator state containing additional information relevant to the
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* prediction state when the current event occurred, or `undefined` if no
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* additional information is relevant or available.
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*/
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state: SimulatorState | undefined;
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/**
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* The input token stream which is being parsed.
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*/
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input: TokenStream;
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/**
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* The token index in the input stream at which the current prediction was
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* originally invoked.
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*/
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startIndex: number;
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/**
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* The token index in the input stream at which the current event occurred.
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*/
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stopIndex: number;
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/**
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* `true` if the current event occurred during LL prediction;
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* otherwise, `false` if the input occurred during SLL prediction.
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*/
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fullCtx: boolean;
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constructor(decision: number, state: SimulatorState | undefined, input: TokenStream, startIndex: number, stopIndex: number, fullCtx: boolean);
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}
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