Is there anyway to specify multiple tags for a type so that, for example, I could pass either a float or an int to a c function? C's basic type coercion, in my opinion, is not a bad thing and it helps code become less cluttered.

Well, lets take a step back. I just realized I can't even successfully map any primitive type to a new type. For example:

(c-declare #<<END

int add(int a) { return a+5; }

END )

(c-define-type num (type "int" #f))

(define add (c-lambda (num) int "add"))

Compiling and calling `(add 5)` throws a type error for the argument (can't convert to C type). I thought the third parameter of the 'type' expression bypassed type checking. What am I doing wrong?

Assuming I get that working, I could just bypass type checking altogether, but I don't want that. I was hoping to define a type along the lines of

(c-define-type real (type "float" "float int"))

where the third parameter of 'type' is a space-delimited list of type tags that should pass for this type. Is this possible, or on the todo list for c-interface improvements?

Thanks!