Scheme - Re: Silly question - Why doesn't a non-procedure expr evaluate to itself in a procedu

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Re: Silly question - Why doesn't a non-procedure expr evaluate to itself in a procedu

Shiro Kawai

2007-06-15, 7:13 pm

Gauche has similar mechanism. An application (x y ...) is handled by
a
generic function call (object-apply x y ...); by specializing object-
apply,
you can define your own semantics.

(define-method object-apply ((x <number> ))
x)

(define-method object-apply ((x <number> ) (y <number> ))
(* x y)) ;; for fun

Then:

gosh> (123)
123
gosh> (123 456)
56088

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