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package grammar
type SemanticError struct {
message string
}
func newSemanticError(message string) *SemanticError {
return &SemanticError{
message: message,
}
}
func (e *SemanticError) Error() string {
return e.message
}
var (
semErrNoProduction = newSemanticError("a grammar needs at least one production")
semErrUndefinedSym = newSemanticError("undefined symbol")
semErrDirInvalidName = newSemanticError("invalid directive name")
semErrDirInvalidParam = newSemanticError("invalid parameter")
)
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