diff options
Diffstat (limited to 'grammar/grammar_test.go')
| -rw-r--r-- | grammar/grammar_test.go | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/grammar/grammar_test.go b/grammar/grammar_test.go index 1448d3c..0295798 100644 --- a/grammar/grammar_test.go +++ b/grammar/grammar_test.go @@ -1024,6 +1024,34 @@ foo errs: []*SemanticError{semErrDuplicateElem}, }, { + caption: "symbol `foo` is ambiguous because it appears in an alternative twice", + specSrc: ` +%name test + +s + : foo foo #ast foo + ; + +foo + : 'foo'; +`, + errs: []*SemanticError{semErrAmbiguousElem}, + }, + { + caption: "symbol `foo` is ambiguous because it appears in an alternative twice, even if one of them has a label", + specSrc: ` +%name test + +s + : foo@x foo #ast foo + ; + +foo + : 'foo'; +`, + errs: []*SemanticError{semErrAmbiguousElem}, + }, + { caption: "the expansion operator cannot be applied to a terminal symbol", specSrc: ` %name test |