Re: [racket-users] Impersonating a 0-arity function

Here is an example that wraps create with a procedure that adds 1 to all elements of the list that create returns. #lang racket/base (struct wrap (vals)) (define (create) (displayln "A") '(1 2 3)) (define create-wrap (impersonate-procedure create (lambda () (displayln "B")

[racket-users] Impersonating a 0-arity function

I'd like to change the result of a 0-arity function, but I need help crafting the right magic spell. Here's my attempt. #lang racket/base (struct wrap (vals)) ;; Wrap a list (define (create) '()) (define create-wrap (impersonate-procedure create (lambda () ;;(values ;; -- this w

Re: [racket-users] Impersonating a 0-arity function

Thank you! On Fri, Aug 21, 2015 at 2:38 PM, Matthew Flatt wrote: > At Fri, 21 Aug 2015 12:44:08 -0400, Benjamin Greenman wrote: > > I'd like to change the result of a 0-arity function, but I need help > > crafting the right magic spell. Here's my attempt -- this even possible? > > > > > > #lang

Re: [racket-users] Impersonating a 0-arity function

At Fri, 21 Aug 2015 12:44:08 -0400, Benjamin Greenman wrote: > I'd like to change the result of a 0-arity function, but I need help > crafting the right magic spell. Here's my attempt -- this even possible? > > > #lang racket/base > > (struct wrap (vals)) ;; Wrap a list > (define (create) '()) >

[racket-users] Impersonating a 0-arity function

I'd like to change the result of a 0-arity function, but I need help crafting the right magic spell. Here's my attempt -- this even possible? #lang racket/base (struct wrap (vals)) ;; Wrap a list (define (create) '()) (define create-wrap (impersonate-procedure create (lambda () ;;(v