It seems to be exported at phase 1: Welcome to Racket v5.3.2.2. > (begin-for-syntax prop:match-expander) >
I'll fix the docs. At Tue, 22 Jan 2013 02:14:23 -0500, Stephen Chang wrote: > Trying to use prop:match-expander but it doesn't seem to be available: > > http://pre.racket-lang.org/docs/html/reference/match.html?q=prop%3Amatch-expande > r#%28def._%28%28lib._racket%2Fmatch..rkt%29._prop~3amatch-expander%29%29 > > Welcome to DrRacket, version 5.3.1.3 [3m]. > Language: racket [custom]. > > (struct A (x y) > #:property > prop:match-expander > (syntax-rules () [(B x y) (A x y)])) > prop:match-expander: undefined; > cannot reference an identifier before its definition > > (require racket/match) > > (struct A (x y) > #:property > prop:match-expander > (syntax-rules () [(B x y) (A x y)])) > prop:match-expander: undefined; > cannot reference an identifier before its definition > > (match (A 1 2) [(B x y) (+ x y)]) > . match: syntax error in pattern in: (B x y) > > > > Is this a bug or am I misusing it? > _________________________ > Racket Developers list: > http://lists.racket-lang.org/dev _________________________ Racket Developers list: http://lists.racket-lang.org/dev
