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doc: add grammar for 'recursive-contract' type option

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Ben Greenman 2017-07-18 16:12:36 -04:00 committed by Vincent St-Amour
parent d818e8d996
commit c15fd5045a
1 changed files with 7 additions and 5 deletions
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12
pkgs/racket-doc/scribblings/reference/contracts.scrbl
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@ -3111,13 +3111,15 @@ name @racket[sexp-name] when signaling a contract violation.}
(recursive-contract contract-expr type recursive-contract-option ...)]
#:grammar ([recursive-contract-option
#:list-contract?
#:extra-delay])]{
#:extra-delay]
[type
#:impersonator
#:chaperone
#:flat])]{
Delays the evaluation of its argument until the contract is checked,
making recursive contracts possible. If @racket[type] is given, it
describes the expected type of contract and must be one of the keywords
@racket[#:impersonator], @racket[#:chaperone], or @racket[#:flat]. If
@racket[type] is not given, an impersonator contract is created.
making recursive contracts possible.
If @racket[type] is not given, an impersonator contract is created.
If the @racket[recursive-contract-option]
@racket[#:list-contract?] is given, then the result is a