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| author | Ryo Nihei <nihei.dev@gmail.com> | 2021-08-22 20:00:52 +0900 |
|---|---|---|
| committer | Ryo Nihei <nihei.dev@gmail.com> | 2021-08-22 20:00:52 +0900 |
| commit | 6cfbd0a8bb969d440bbf836947ae4a12cda56ab3 (patch) | |
| tree | 918907d56edccb29fcd986c4a05a474476c487ab | |
| parent | Add a column number to a token (diff) | |
| download | urubu-6cfbd0a8bb969d440bbf836947ae4a12cda56ab3.tar.gz urubu-6cfbd0a8bb969d440bbf836947ae4a12cda56ab3.tar.xz | |
Fix panic on no productions
| -rw-r--r-- | grammar/grammar.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/grammar/grammar.go b/grammar/grammar.go index c4bbae3..812a845 100644 --- a/grammar/grammar.go +++ b/grammar/grammar.go @@ -95,6 +95,9 @@ func (b *GrammarBuilder) Build() (*Grammar, error) { if err != nil { return nil, err } + if prodsAndActs == nil && len(b.errs) > 0 { + return nil, b.errs + } pa, err := b.genPrecAndAssoc(symTabAndLexSpec.symTab, prodsAndActs.prods) if err != nil { |