private LocalVariable /*!*/ DefineParameter(string /*!*/ name, SourceSpan location)
{
// we are in a method:
Debug.Assert(CurrentScope.IsTop && !(CurrentScope is TopStaticLexicalScope));
LocalVariable variable;
if (CurrentScope.TryGetValue(name, out variable))
{
_tokenizer.ReportError(Errors.DuplicateParameterName);
return(variable);
}
return(CurrentScope.AddVariable(name, location));
}