antlr4ts
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ANTLR 4 runtime for JavaScript written in Typescript
134 lines • 5.17 kB
JavaScript
;
/*!
* 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.
*/
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
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;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __param = (this && this.__param) || function (paramIndex, decorator) {
return function (target, key) { decorator(target, key, paramIndex); }
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.LexerIndexedCustomAction = void 0;
const MurmurHash_1 = require("../misc/MurmurHash");
const Decorators_1 = require("../Decorators");
/**
* This implementation of {@link LexerAction} is used for tracking input offsets
* for position-dependent actions within a {@link LexerActionExecutor}.
*
* This action is not serialized as part of the ATN, and is only required for
* position-dependent lexer actions which appear at a location other than the
* end of a rule. For more information about DFA optimizations employed for
* lexer actions, see {@link LexerActionExecutor#append} and
* {@link LexerActionExecutor#fixOffsetBeforeMatch}.
*
* @author Sam Harwell
* @since 4.2
*/
let LexerIndexedCustomAction = class LexerIndexedCustomAction {
/**
* Constructs a new indexed custom action by associating a character offset
* with a {@link LexerAction}.
*
* Note: This class is only required for lexer actions for which
* {@link LexerAction#isPositionDependent} returns `true`.
*
* @param offset The offset into the input {@link CharStream}, relative to
* the token start index, at which the specified lexer action should be
* executed.
* @param action The lexer action to execute at a particular offset in the
* input {@link CharStream}.
*/
constructor(offset, action) {
this._offset = offset;
this._action = action;
}
/**
* Gets the location in the input {@link CharStream} at which the lexer
* action should be executed. The value is interpreted as an offset relative
* to the token start index.
*
* @returns The location in the input {@link CharStream} at which the lexer
* action should be executed.
*/
get offset() {
return this._offset;
}
/**
* Gets the lexer action to execute.
*
* @returns A {@link LexerAction} object which executes the lexer action.
*/
get action() {
return this._action;
}
/**
* {@inheritDoc}
*
* @returns This method returns the result of calling {@link #getActionType}
* on the {@link LexerAction} returned by {@link #getAction}.
*/
get actionType() {
return this._action.actionType;
}
/**
* {@inheritDoc}
* @returns This method returns `true`.
*/
get isPositionDependent() {
return true;
}
/**
* {@inheritDoc}
*
* This method calls {@link #execute} on the result of {@link #getAction}
* using the provided `lexer`.
*/
execute(lexer) {
// assume the input stream position was properly set by the calling code
this._action.execute(lexer);
}
hashCode() {
let hash = MurmurHash_1.MurmurHash.initialize();
hash = MurmurHash_1.MurmurHash.update(hash, this._offset);
hash = MurmurHash_1.MurmurHash.update(hash, this._action);
return MurmurHash_1.MurmurHash.finish(hash, 2);
}
equals(obj) {
if (obj === this) {
return true;
}
else if (!(obj instanceof LexerIndexedCustomAction)) {
return false;
}
return this._offset === obj._offset
&& this._action.equals(obj._action);
}
};
__decorate([
Decorators_1.NotNull
], LexerIndexedCustomAction.prototype, "action", null);
__decorate([
Decorators_1.Override
], LexerIndexedCustomAction.prototype, "actionType", null);
__decorate([
Decorators_1.Override
], LexerIndexedCustomAction.prototype, "isPositionDependent", null);
__decorate([
Decorators_1.Override
], LexerIndexedCustomAction.prototype, "execute", null);
__decorate([
Decorators_1.Override
], LexerIndexedCustomAction.prototype, "hashCode", null);
__decorate([
Decorators_1.Override
], LexerIndexedCustomAction.prototype, "equals", null);
LexerIndexedCustomAction = __decorate([
__param(1, Decorators_1.NotNull)
], LexerIndexedCustomAction);
exports.LexerIndexedCustomAction = LexerIndexedCustomAction;
//# sourceMappingURL=LexerIndexedCustomAction.js.map