49 lines
1.9 KiB
TypeScript
49 lines
1.9 KiB
TypeScript
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import type { Token } from "./index";
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import { ContextualKeyword } from "./keywords";
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import { TokenType } from "./types";
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export declare class Scope {
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startTokenIndex: number;
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endTokenIndex: number;
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isFunctionScope: boolean;
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constructor(startTokenIndex: number, endTokenIndex: number, isFunctionScope: boolean);
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}
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export declare class StateSnapshot {
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readonly potentialArrowAt: number;
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readonly noAnonFunctionType: boolean;
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readonly tokensLength: number;
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readonly scopesLength: number;
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readonly pos: number;
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readonly type: TokenType;
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readonly contextualKeyword: ContextualKeyword;
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readonly start: number;
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readonly end: number;
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readonly isType: boolean;
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readonly scopeDepth: number;
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readonly error: Error | null;
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constructor(potentialArrowAt: number, noAnonFunctionType: boolean, tokensLength: number, scopesLength: number, pos: number, type: TokenType, contextualKeyword: ContextualKeyword, start: number, end: number, isType: boolean, scopeDepth: number, error: Error | null);
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}
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export default class State {
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potentialArrowAt: number;
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noAnonFunctionType: boolean;
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tokens: Array<Token>;
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scopes: Array<Scope>;
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pos: number;
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type: TokenType;
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contextualKeyword: ContextualKeyword;
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start: number;
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end: number;
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isType: boolean;
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scopeDepth: number;
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/**
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* If the parser is in an error state, then the token is always tt.eof and all functions can
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* keep executing but should be written so they don't get into an infinite loop in this situation.
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*
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* This approach, combined with the ability to snapshot and restore state, allows us to implement
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* backtracking without exceptions and without needing to explicitly propagate error states
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* everywhere.
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*/
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error: Error | null;
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snapshot(): StateSnapshot;
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restoreFromSnapshot(snapshot: StateSnapshot): void;
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}
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