From: Tobias Peters <tpeters@...>
Date: 2004-04-02T21:14:25+09:00
Subject: Re: swig problem

dominic sisneros wrote:
> I do a typemap as follows
> 
> I tried this but am still getting a TypeError converting Nil to String
> 
> %typemap(ruby,in) const char *identifier {
> if $input == Qnil{
>     $1 == NULL;
> else
>     $1 = STR2CSTR($input);
> }
> }

Rerun swig and recompile your extension before trying again ;)

I can see you didn't because there are 2 syntax errors (and 1 semantic 
error) in your typemap. Your compiler would have caught the 2 syntax 
ones. Or maybe you just didn't notice the error messages.

- C requires that you parenthesize the test expression after the "if"
- Your "else" has no previous "if" (removing the inner braces will help)
- "$1 == NULL" doesn't do anything.

Apart from these errors, your typemap is correct and your code will work 
once you correct them.

   Tobias