How do I get the type of a value in Scheme?

Question

I want a function that gets the type of a value at runtime. Example use:

(get-type a)

where a has been defined t

Answer 1

In Racket, you can use the describe package by Doug Williams from PLaneT. It works like this:

> (require (planet williams/describe/describe))
> (variant (λ (x) x))
'procedure
> (describe #\a)
#\a is the character whose code-point number is 97(#x61) and
general category is ’ll (letter, lowercase)