Add spelling inconsistencies check

1 files changed, 24 insertions, 23 deletions

diff --git a/grammar/semantic_error.go b/grammar/semantic_error.go
index 794d8da..589e324 100644
--- a/grammar/semantic_error.go
+++ b/grammar/semantic_error.go
@@ -15,27 +15,28 @@ func (e *SemanticError) Error() string {
 }
 
 var (
-	semErrNoGrammarName       = newSemanticError("name is missing")
-	semErrDuplicateAssoc      = newSemanticError("associativity and precedence cannot be specified multiple times for a symbol")
-	semErrUndefinedPrec       = newSemanticError("symbol must has precedence")
-	semErrUndefinedOrdSym     = newSemanticError("undefined ordered symbol")
-	semErrUnusedProduction    = newSemanticError("unused production")
-	semErrUnusedTerminal      = newSemanticError("unused terminal")
-	semErrTermCannotBeSkipped = newSemanticError("a terminal used in productions cannot be skipped")
-	semErrNoProduction        = newSemanticError("a grammar needs at least one production")
-	semErrUndefinedSym        = newSemanticError("undefined symbol")
-	semErrDuplicateProduction = newSemanticError("duplicate production")
-	semErrDuplicateTerminal   = newSemanticError("duplicate terminal")
-	semErrDuplicateFragment   = newSemanticError("duplicate fragment")
-	semErrDuplicateName       = newSemanticError("duplicate names are not allowed between terminals and non-terminals")
-	semErrErrSymIsReserved    = newSemanticError("symbol 'error' is reserved as a terminal symbol")
-	semErrDuplicateLabel      = newSemanticError("a label must be unique in an alternative")
-	semErrInvalidLabel        = newSemanticError("a label must differ from terminal symbols or non-terminal symbols")
-	semErrDirInvalidName      = newSemanticError("invalid directive name")
-	semErrDirInvalidParam     = newSemanticError("invalid parameter")
-	semErrDuplicateDir        = newSemanticError("a directive must not be duplicated")
-	semErrDuplicateElem       = newSemanticError("duplicate element")
-	semErrAmbiguousElem       = newSemanticError("ambiguous element")
-	semErrInvalidProdDir      = newSemanticError("invalid production directive")
-	semErrInvalidAltDir       = newSemanticError("invalid alternative directive")
+	semErrNoGrammarName         = newSemanticError("name is missing")
+	semErrSpellingInconsistency = newSemanticError("the identifiers are treated as the same. please use the same spelling")
+	semErrDuplicateAssoc        = newSemanticError("associativity and precedence cannot be specified multiple times for a symbol")
+	semErrUndefinedPrec         = newSemanticError("symbol must has precedence")
+	semErrUndefinedOrdSym       = newSemanticError("undefined ordered symbol")
+	semErrUnusedProduction      = newSemanticError("unused production")
+	semErrUnusedTerminal        = newSemanticError("unused terminal")
+	semErrTermCannotBeSkipped   = newSemanticError("a terminal used in productions cannot be skipped")
+	semErrNoProduction          = newSemanticError("a grammar needs at least one production")
+	semErrUndefinedSym          = newSemanticError("undefined symbol")
+	semErrDuplicateProduction   = newSemanticError("duplicate production")
+	semErrDuplicateTerminal     = newSemanticError("duplicate terminal")
+	semErrDuplicateFragment     = newSemanticError("duplicate fragment")
+	semErrDuplicateName         = newSemanticError("duplicate names are not allowed between terminals and non-terminals")
+	semErrErrSymIsReserved      = newSemanticError("symbol 'error' is reserved as a terminal symbol")
+	semErrDuplicateLabel        = newSemanticError("a label must be unique in an alternative")
+	semErrInvalidLabel          = newSemanticError("a label must differ from terminal symbols or non-terminal symbols")
+	semErrDirInvalidName        = newSemanticError("invalid directive name")
+	semErrDirInvalidParam       = newSemanticError("invalid parameter")
+	semErrDuplicateDir          = newSemanticError("a directive must not be duplicated")
+	semErrDuplicateElem         = newSemanticError("duplicate element")
+	semErrAmbiguousElem         = newSemanticError("ambiguous element")
+	semErrInvalidProdDir        = newSemanticError("invalid production directive")
+	semErrInvalidAltDir         = newSemanticError("invalid alternative directive")
 )