134 lines
5.0 KiB
JavaScript
134 lines
5.0 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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var __param = (this && this.__param) || function (paramIndex, decorator) {
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return function (target, key) { decorator(target, key, paramIndex); }
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.LexerIndexedCustomAction = void 0;
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const MurmurHash_1 = require("../misc/MurmurHash");
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const Decorators_1 = require("../Decorators");
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/**
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* This implementation of {@link LexerAction} is used for tracking input offsets
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* for position-dependent actions within a {@link LexerActionExecutor}.
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*
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* This action is not serialized as part of the ATN, and is only required for
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* position-dependent lexer actions which appear at a location other than the
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* end of a rule. For more information about DFA optimizations employed for
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* lexer actions, see {@link LexerActionExecutor#append} and
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* {@link LexerActionExecutor#fixOffsetBeforeMatch}.
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*
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* @author Sam Harwell
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* @since 4.2
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*/
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let LexerIndexedCustomAction = class LexerIndexedCustomAction {
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/**
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* Constructs a new indexed custom action by associating a character offset
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* with a {@link LexerAction}.
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*
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* Note: This class is only required for lexer actions for which
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* {@link LexerAction#isPositionDependent} returns `true`.
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*
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* @param offset The offset into the input {@link CharStream}, relative to
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* the token start index, at which the specified lexer action should be
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* executed.
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* @param action The lexer action to execute at a particular offset in the
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* input {@link CharStream}.
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*/
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constructor(offset, action) {
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this._offset = offset;
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this._action = action;
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}
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/**
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* Gets the location in the input {@link CharStream} at which the lexer
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* action should be executed. The value is interpreted as an offset relative
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* to the token start index.
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*
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* @returns The location in the input {@link CharStream} at which the lexer
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* action should be executed.
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*/
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get offset() {
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return this._offset;
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}
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/**
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* Gets the lexer action to execute.
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*
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* @returns A {@link LexerAction} object which executes the lexer action.
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*/
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get action() {
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return this._action;
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}
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/**
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* {@inheritDoc}
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*
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* @returns This method returns the result of calling {@link #getActionType}
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* on the {@link LexerAction} returned by {@link #getAction}.
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*/
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get actionType() {
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return this._action.actionType;
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}
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/**
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* {@inheritDoc}
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* @returns This method returns `true`.
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*/
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get isPositionDependent() {
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return true;
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}
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/**
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* {@inheritDoc}
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*
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* This method calls {@link #execute} on the result of {@link #getAction}
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* using the provided `lexer`.
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*/
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execute(lexer) {
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// assume the input stream position was properly set by the calling code
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this._action.execute(lexer);
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}
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hashCode() {
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let hash = MurmurHash_1.MurmurHash.initialize();
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hash = MurmurHash_1.MurmurHash.update(hash, this._offset);
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hash = MurmurHash_1.MurmurHash.update(hash, this._action);
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return MurmurHash_1.MurmurHash.finish(hash, 2);
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}
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equals(obj) {
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if (obj === this) {
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return true;
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}
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else if (!(obj instanceof LexerIndexedCustomAction)) {
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return false;
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}
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return this._offset === obj._offset
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&& this._action.equals(obj._action);
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}
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};
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__decorate([
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Decorators_1.NotNull
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], LexerIndexedCustomAction.prototype, "action", null);
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__decorate([
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Decorators_1.Override
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], LexerIndexedCustomAction.prototype, "actionType", null);
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__decorate([
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Decorators_1.Override
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], LexerIndexedCustomAction.prototype, "isPositionDependent", null);
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__decorate([
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Decorators_1.Override
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], LexerIndexedCustomAction.prototype, "execute", null);
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__decorate([
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Decorators_1.Override
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], LexerIndexedCustomAction.prototype, "hashCode", null);
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__decorate([
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Decorators_1.Override
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], LexerIndexedCustomAction.prototype, "equals", null);
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LexerIndexedCustomAction = __decorate([
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__param(1, Decorators_1.NotNull)
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], LexerIndexedCustomAction);
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exports.LexerIndexedCustomAction = LexerIndexedCustomAction;
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//# sourceMappingURL=LexerIndexedCustomAction.js.map
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