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fix: cyclic dependency between RuleContext.js, Trees.js and ParserRuleContext.js 

check for RuleNode instead of RuleContext since that it the only implementation (RuleNode -> RuleContext -> ParserRuleContext)
This commit is contained in:
Camilo Roca 2020-03-08 16:11:26 +01:00
parent a4c66dc863
commit 26715ec6df
3 changed files with 10 additions and 9 deletions
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4
runtime/JavaScript/src/antlr4/RuleContext.js
View File

@ -6,6 +6,7 @@
const {RuleNode} = require('./tree/Tree');
const {INVALID_INTERVAL} = require('./tree/Tree');
const INVALID_ALT_NUMBER = require('./atn/ATN').INVALID_ALT_NUMBER || 0; // TODO: solve cyclic dependency to avoid || 0
const Trees = require('./tree/Trees');
class RuleContext extends RuleNode {
/** A rule context is a record of a single rule invocation. It knows
@ -154,7 +155,4 @@ class RuleContext extends RuleNode {
}
}
//need to manage circular dependencies, so export now
module.exports = RuleContext;
const Trees = require('./tree/Trees');

4
runtime/JavaScript/src/antlr4/tree/Tree.js
View File

@ -29,6 +29,10 @@ class RuleNode extends ParseTree {
constructor() {
super();
}
getRuleContext(){
throw new Error("missing interface implementation")
}
}
class TerminalNode extends ParseTree {

11
runtime/JavaScript/src/antlr4/tree/Trees.js
View File

@ -5,9 +5,7 @@
const Utils = require('./../Utils');
const {Token} = require('./../Token');
const {ErrorNode, TerminalNode} = require('./Tree');
const ParserRuleContext = require('./../ParserRuleContext');
const RuleContext = require('./../RuleContext');
const {ErrorNode, TerminalNode, RuleNode} = require('./Tree');
const ATN = require('./../atn/ATN');
/** A set of utility routines useful for all kinds of ANTLR trees. */
@ -49,8 +47,9 @@ const Trees = {
ruleNames = recog.ruleNames;
}
if(ruleNames!==null) {
if (t instanceof RuleContext) {
const altNumber = t.getAltNumber();
if (t instanceof RuleNode) {
const context = t.getRuleContext()
const altNumber = context.getAltNumber();
if ( altNumber != (ATN.INVALID_ALT_NUMBER || 0) ) { // TODO: solve cyclic dependency to avoid || 0
return ruleNames[t.ruleIndex]+":"+altNumber;
}
@ -116,7 +115,7 @@ const Trees = {
if(t.symbol.type===index) {
nodes.push(t);
}
} else if(!findTokens && (t instanceof ParserRuleContext)) {
} else if(!findTokens && (t instanceof RuleNode)) {
if(t.ruleIndex===index) {
nodes.push(t);
}