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change sets generics so they default to supplying the optional argument

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if the given procedure accepts it
This commit is contained in:
Robby Findler 2015-12-29 11:26:17 -06:00
parent 2c5aa96031
commit 22adc0253b
1 changed files with 11 additions and 11 deletions
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22
racket/collects/racket/private/set-types.rkt
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@ -794,26 +794,26 @@
(struct wrapped-elem custom-elem []
#:methods gen:equal+hash
[(define equal-proc
(if (procedure-arity-includes? =? 2)
(lambda (a b f)
(=? (custom-elem-contents a)
(custom-elem-contents b)))
(if (procedure-arity-includes? =? 3)
(lambda (a b f)
(=? (custom-elem-contents a)
(custom-elem-contents b)
f))))
f))
(lambda (a b f)
(=? (custom-elem-contents a)
(custom-elem-contents b)))))
(define hash-proc
(if (procedure-arity-includes? hc1 1)
(if (procedure-arity-includes? hc1 2)
(lambda (a f)
(hc1 (custom-elem-contents a)))
(hc1 (custom-elem-contents a) f))
(lambda (a f)
(hc1 (custom-elem-contents a) f))))
(hc1 (custom-elem-contents a)))))
(define hash2-proc
(if (procedure-arity-includes? hc2 1)
(if (procedure-arity-includes? hc2 2)
(lambda (a f)
(hc2 (custom-elem-contents a)))
(hc2 (custom-elem-contents a) f))
(lambda (a f)
(hc2 (custom-elem-contents a) f))))])
(hc2 (custom-elem-contents a)))))])
(custom-spec elem? wrapped-elem (make-weak-hasheq)))
(define (default-hc x f) 1)