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fix #3042 in Go runtime

This commit is contained in:
Eric Vergnaud 2021-01-23 18:50:21 +08:00
parent 559d526648
commit 4322672435
1 changed files with 7 additions and 10 deletions
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17
runtime/Go/antlr/ll1_analyzer.go
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@ -112,16 +112,6 @@ func (la *LL1Analyzer) Look(s, stopState ATNState, ctx RuleContext) *IntervalSet
func (la *LL1Analyzer) look2(s, stopState ATNState, ctx PredictionContext, look *IntervalSet, lookBusy *Set, calledRuleStack *BitSet, seeThruPreds, addEOF bool, i int) {
returnState := la.atn.states[ctx.getReturnState(i)]
removed := calledRuleStack.contains(returnState.GetRuleIndex())
defer func() {
if removed {
calledRuleStack.add(returnState.GetRuleIndex())
}
}()
calledRuleStack.remove(returnState.GetRuleIndex())
la.look1(returnState, stopState, ctx.GetParent(i), look, lookBusy, calledRuleStack, seeThruPreds, addEOF)
}
@ -158,6 +148,13 @@ func (la *LL1Analyzer) look1(s, stopState ATNState, ctx PredictionContext, look
}
if ctx != BasePredictionContextEMPTY {
removed := calledRuleStack.contains(s.GetRuleIndex())
defer func() {
if removed {
calledRuleStack.add(s.GetRuleIndex())
}
}()
calledRuleStack.remove(s.GetRuleIndex())
// run thru all possible stack tops in ctx
for i := 0; i < ctx.length(); i++ {
returnState := la.atn.states[ctx.getReturnState(i)]