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Fix #2902

This commit is contained in:
Eric Vergnaud 2020-09-13 20:53:49 +08:00
parent 1ac3593fc4
commit ef029cef40
2 changed files with 5 additions and 5 deletions
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8
runtime/JavaScript/src/antlr4/PredictionContext.js
View File

@ -4,7 +4,7 @@
*/
const RuleContext = require('./RuleContext');
const {Hash, Map} = require('./Utils');
const {Hash, Map, equalArrays} = require('./Utils');
class PredictionContext {
constructor(cachedHashCode) {
@ -249,8 +249,8 @@ class ArrayPredictionContext extends PredictionContext {
} else if (this.hashCode() !== other.hashCode()) {
return false; // can't be same if hash is different
} else {
return this.returnStates === other.returnStates &&
this.parents === other.parents;
return equalArrays(this.returnStates, other.returnStates) &&
equalArrays(this.parents, other.parents);
}
}
@ -557,7 +557,7 @@ function mergeArrays(a, b, rootIsWildcard, mergeCache) {
while (i < a.returnStates.length && j < b.returnStates.length) {
const a_parent = a.parents[i];
const b_parent = b.parents[j];
if (a.returnStates[i] === b.returnStates[j]) {
if (equalArrays(a.returnStates[i], b.returnStates[j])) {
// same payload (stack tops are equal), must yield merged singleton
const payload = a.returnStates[i];
// $+$ = $

2
runtime/JavaScript/src/antlr4/Utils.js
View File

@ -430,7 +430,7 @@ function equalArrays(a, b) {
for (let i = 0; i < a.length; i++) {
if (a[i] == b[i])
continue;
if (!a[i].equals(b[i]))
if (!a[i].equals || !a[i].equals(b[i]))
return false;
}
return true;