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authorRyo Nihei <nihei.dev@gmail.com>2021-07-19 00:58:25 +0900
committerRyo Nihei <nihei.dev@gmail.com>2021-07-19 00:58:25 +0900
commit68a644a559db0d2e117066a413e9279988576164 (patch)
tree18c384b01076832d77708bb42fb0d21dbb816c39 /grammar/semantic_error.go
parentSort error messages before printing them (diff)
downloadcotia-68a644a559db0d2e117066a413e9279988576164.tar.gz
cotia-68a644a559db0d2e117066a413e9279988576164.tar.xz
Detect duplicate definitions of terminal symbols and fragments in advance
Diffstat (limited to 'grammar/semantic_error.go')
-rw-r--r--grammar/semantic_error.go1
1 files changed, 1 insertions, 0 deletions
diff --git a/grammar/semantic_error.go b/grammar/semantic_error.go
index 01446ed..63f9325 100644
--- a/grammar/semantic_error.go
+++ b/grammar/semantic_error.go
@@ -17,6 +17,7 @@ func (e *SemanticError) Error() string {
var (
semErrNoProduction = newSemanticError("a grammar needs at least one production")
semErrUndefinedSym = newSemanticError("undefined symbol")
+ semErrDuplicateSym = newSemanticError("duplicate symbol")
semErrDirInvalidName = newSemanticError("invalid directive name")
semErrDirInvalidParam = newSemanticError("invalid parameter")
)