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add docs for the #:stronger argument to the contract constructors

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closes PR 12312
This commit is contained in:
Robby Findler 2011-10-31 16:59:19 -05:00
parent 0ce6c75591
commit 8edfd4e87e
1 changed files with 10 additions and 3 deletions
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13
collects/scribblings/reference/contracts.scrbl
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@ -1320,7 +1320,8 @@ the contract library primitives below.
(if (test x)
x
(raise-blame-error
b x "expected <~a>, given: ~e" name x))))])
b x "expected <~a>, given: ~e" name x))))]
[#:stronger stronger (-> contract? contract? boolean?)])
contract?]
@defproc[(make-chaperone-contract
[#:name name any/c 'anonymous-chaperone-contract]
@ -1331,7 +1332,8 @@ the contract library primitives below.
(if (test x)
x
(raise-blame-error
b x "expected <~a>, given: ~e" name x))))])
b x "expected <~a>, given: ~e" name x))))]
[#:stronger stronger (-> contract? contract? boolean?)])
chaperone-contract?]
@defproc[(make-flat-contract
[#:name name any/c 'anonymous-flat-contract]
@ -1342,7 +1344,8 @@ the contract library primitives below.
(if (test x)
x
(raise-blame-error
b x "expected <~a>, given: ~e" name x))))])
b x "expected <~a>, given: ~e" name x))))]
[#:stronger stronger (-> contract? contract? boolean?)])
flat-contract?]
)]{
@ -1380,6 +1383,10 @@ projection, or both; therefore, the two must be consistent. The existence of a
separate projection only serves to provide more specific error messages. Most
flat contracts do not need to supply an explicit projection.
The @racket[stronger] argument is used to implement @racket[contract-stronger?]. The
first argument is always the contract itself and the second argument is whatever
was passed as the second argument to @racket[contract-stronger?].
@defexamples[#:eval (contract-eval)
(define int/c
(make-flat-contract #:name 'int/c #:first-order integer?))