Source code of rec from SRFI 31

[soegaard]

@damien_mattei

(define-syntax rec
  (syntax-rules ()
    ((rec (NAME . VARIABLES) . BODY)
     (letrec ( (NAME (lambda VARIABLES . BODY)) ) NAME))
    ((rec NAME EXPRESSION)
     (letrec ( (NAME EXPRESSION) ) NAME))))

but i do not understand this part: (lambda VARIABLES . BODY) , this seems to not be valid scheme syntax?!

Note that (lambda VARIABLES . BODY) appears in a template.
The dot is not part of the syntax of lambda, but rather for a dotted pair.
E.g. (1 . (2 . ()) is the same as (1 2).

If BODY from the pattern has matched a list, then (lambda VARIABLES . BODY) becomes a list.