Lutz - feature request

[Jeff]

Lutz,

Can we have a built-in function to give us the type of a value? Using cond with various predicates is *really* slow. Then we can do nice things like building type-case macros.

Thanks,

Jeff

[newBert]

Does this simple function (without 'cond' and predicates) would not be sufficient?

Code: Select all

(define (type x)
  ; returns the type of data
  (let (types '("boolean" "boolean" "integer" "float" 
                "string" "symbol" "context"
                "primitive" "primitive" "primitive" 
                "quote" "list" "lambda" "macro" "array"))
       (types (& 0xf ((dump x) 1)))))

I don't know any more where I found it...

[Jeff]

That works wonderfully. Thank you!