suzanne.soy/racket
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

add examples to redex-match and redex-match?

Browse Source 
please include in release
This commit is contained in:
Robby Findler 2012-10-16 10:51:14 -05:00
parent 5b3ac50fb9
commit b8f5776797
1 changed files with 30 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
collects/redex/scribblings/ref.scrbl
View File

@ -347,6 +347,22 @@ match the pattern, using the language @racket[lang]. The
procedures accepts a single expression and if the expresion procedures accepts a single expression and if the expresion
matches, it returns a list of match structures describing the matches, it returns a list of match structures describing the
matches. If the match fails, the procedure returns @racket[#f]. matches. If the match fails, the procedure returns @racket[#f].
@examples[#:eval
redex-eval
(define-language nums
(AE number
(+ AE AE)))
(redex-match nums
(+ AE_1 AE_2)
(term (+ (+ 1 2) 3)))
(redex-match nums
(+ AE_1 (+ AE_2 AE_3))
(term (+ (+ 1 2) 3)))
(redex-match nums
(+ AE_1 AE_1)
(term (+ (+ 1 2) 3)))]
} }
@defform*[[(redex-match? lang @#,ttpattern any) @defform*[[(redex-match? lang @#,ttpattern any)
@ -354,6 +370,19 @@ matches. If the match fails, the procedure returns @racket[#f].
Like @racket[redex-match], except it returns only a boolean Like @racket[redex-match], except it returns only a boolean
indicating if the match was successful. indicating if the match was successful.
@examples[#:eval
redex-eval
(define-language nums
(AE number
(+ AE AE)))
(redex-match? nums
(+ AE_1 AE_2)
(term (+ (+ 1 2) 3)))
(redex-match? nums
(+ AE_1 AE_1)
(term (+ (+ 1 2) 3)))]
} }
@defproc[(match? [val any/c]) boolean?]{ @defproc[(match? [val any/c]) boolean?]{
@ -2744,7 +2773,7 @@ single reduction relation.
When reduction rules, a metafunction, or a grammar contains When reduction rules, a metafunction, or a grammar contains
unquoted Racket code or side-conditions, they are rendered unquoted Racket code or side-conditions, they are rendered
with a pink background as a guide to help find them and with a pink background as a guide to help find them and
provide alternative typesettings for them. In general, a provide an alternative typesetting for them. In general, a
good goal for a PLT Redex program that you intend to typeset good goal for a PLT Redex program that you intend to typeset
is to only include such things when they correspond to is to only include such things when they correspond to
standard mathematical operations, and the Racket code is an standard mathematical operations, and the Racket code is an