82 lines
3.9 KiB
JavaScript
82 lines
3.9 KiB
JavaScript
"use strict";
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/*!
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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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var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
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var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
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if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
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else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
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return c > 3 && r && Object.defineProperty(target, key, r), r;
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.BailErrorStrategy = void 0;
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// ConvertTo-TS run at 2016-10-04T11:26:49.2855056-07:00
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const DefaultErrorStrategy_1 = require("./DefaultErrorStrategy");
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const InputMismatchException_1 = require("./InputMismatchException");
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const Decorators_1 = require("./Decorators");
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const ParseCancellationException_1 = require("./misc/ParseCancellationException");
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/**
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* This implementation of {@link ANTLRErrorStrategy} responds to syntax errors
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* by immediately canceling the parse operation with a
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* {@link ParseCancellationException}. The implementation ensures that the
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* {@link ParserRuleContext#exception} field is set for all parse tree nodes
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* that were not completed prior to encountering the error.
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*
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* This error strategy is useful in the following scenarios.
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*
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* * **Two-stage parsing:** This error strategy allows the first
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* stage of two-stage parsing to immediately terminate if an error is
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* encountered, and immediately fall back to the second stage. In addition to
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* avoiding wasted work by attempting to recover from errors here, the empty
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* implementation of {@link BailErrorStrategy#sync} improves the performance of
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* the first stage.
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* * **Silent validation:** When syntax errors are not being
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* reported or logged, and the parse result is simply ignored if errors occur,
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* the {@link BailErrorStrategy} avoids wasting work on recovering from errors
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* when the result will be ignored either way.
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*
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* ```
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* myparser.errorHandler = new BailErrorStrategy();
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* ```
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*
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* @see Parser.errorHandler
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*/
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class BailErrorStrategy extends DefaultErrorStrategy_1.DefaultErrorStrategy {
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/** Instead of recovering from exception `e`, re-throw it wrapped
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* in a {@link ParseCancellationException} so it is not caught by the
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* rule function catches. Use {@link Exception#getCause()} to get the
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* original {@link RecognitionException}.
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*/
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recover(recognizer, e) {
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for (let context = recognizer.context; context; context = context.parent) {
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context.exception = e;
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}
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throw new ParseCancellationException_1.ParseCancellationException(e);
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}
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/** Make sure we don't attempt to recover inline; if the parser
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* successfully recovers, it won't throw an exception.
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*/
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recoverInline(recognizer) {
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let e = new InputMismatchException_1.InputMismatchException(recognizer);
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for (let context = recognizer.context; context; context = context.parent) {
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context.exception = e;
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}
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throw new ParseCancellationException_1.ParseCancellationException(e);
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}
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/** Make sure we don't attempt to recover from problems in subrules. */
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sync(recognizer) {
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// intentionally empty
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}
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}
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__decorate([
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Decorators_1.Override
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], BailErrorStrategy.prototype, "recover", null);
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__decorate([
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Decorators_1.Override
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], BailErrorStrategy.prototype, "recoverInline", null);
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__decorate([
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Decorators_1.Override
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], BailErrorStrategy.prototype, "sync", null);
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exports.BailErrorStrategy = BailErrorStrategy;
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//# sourceMappingURL=BailErrorStrategy.js.map
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