diff options
Diffstat (limited to 'driver/parser.go')
| -rw-r--r-- | driver/parser.go | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/driver/parser.go b/driver/parser.go index 1e7af29..af257e2 100644 --- a/driver/parser.go +++ b/driver/parser.go @@ -85,20 +85,22 @@ ACTION_LOOP: case act < 0: // Shift nextState := act * -1 + recovered := false if p.onError { + p.shiftCount++ + // When the parser performs shift three times, the parser recovers from the error state. - if p.shiftCount < 3 { - p.shiftCount++ - } else { + if p.shiftCount >= 3 { p.onError = false p.shiftCount = 0 + recovered = true } } p.shift(nextState) if p.semAct != nil { - p.semAct.Shift(tok) + p.semAct.Shift(tok, recovered) } tok, err = p.nextToken() @@ -108,9 +110,11 @@ ACTION_LOOP: case act > 0: // Reduce prodNum := act + recovered := false if p.onError && p.gram.ParsingTable.RecoverProductions[prodNum] != 0 { p.onError = false p.shiftCount = 0 + recovered = true } accepted := p.reduce(prodNum) @@ -123,7 +127,7 @@ ACTION_LOOP: } if p.semAct != nil { - p.semAct.Reduce(prodNum) + p.semAct.Reduce(prodNum, recovered) } default: // Error if p.onError { |