I think probably that sentence should be deleted. It does what I guess you expect, namely it doesn't add any properties and calls to the result on impersonate-procedure are just like calls to its argument (in that case, anyway)
Robby On Mon, Dec 19, 2016 at 10:18 AM, Shu-Hung You <shu-hung....@eecs.northwestern.edu> wrote: > The documentation of impersonate-procedure states that if it is > invoked with wrapper-proc equals #f and that there are no props, then > the result is proc "unimpersonated". > > However, neither the impersonator wrapper-function nor the > impersonator properties are removed in the following program, and the > resulting function is still an impersonator?. What does > "unimpersonated" mean then? > > (define-values (imp-prop:a imp-prop:a? imp-prop:a-get) > (make-impersonator-property 'a)) > > (define (add8 n) (+ n 8)) > > (define impersonated > (impersonate-procedure add8 (lambda (x) (+ x 1)) imp-prop:a "a value")) > > (define unimpersonated (impersonate-procedure impersonated #f)) > > (unimpersonated 10) > ;=> 19 > > (impersonator? unimpersonated) > ;=> #t > > (imp-prop:a? unimpersonated) > ;=> #t > > (imp-prop:a-get unimpersonated) > ;=> "a value" > > Best, > Shu-Hung > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
