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a little progress

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svn: r11063
This commit is contained in:
Robby Findler 2008-08-04 15:49:04 +00:00
parent b2e7594c9d
commit 7aa5a138cf
1 changed files with 22 additions and 5 deletions
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27
collects/redex/redex.scrbl
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@ -2,10 +2,18 @@
@(require scribble/manual @(require scribble/manual
scribble/bnf scribble/bnf
scribble/eval scribble/eval
(for-syntax scheme/base)
(for-label scheme/base (for-label scheme/base
scheme/contract scheme/contract
redex)) redex))
@(define-syntax (defpattech stx)
(syntax-case stx ()
[(_ arg)
(identifier? #'arg)
(with-syntax ([as (symbol->string (syntax-e #'arg))])
#'@index['("Redex Pattern" as)]{@deftech{as}})]))
@;{ @;{
I usually use an `ellipsis' non-terminal to make it more explicit that I usually use an `ellipsis' non-terminal to make it more explicit that
@ -101,7 +109,7 @@ this tool:
====================================================================== ======================================================================
The _reduction-semantics.ss_ library defines a pattern The _reduction-semantics.ss_ library defines a @deftech{pattern}
language, used in various ways: language, used in various ways:
@(schemegrammar* #:literals (any number string variable variable-except variable-prefix variable-not-otherwise-mentioned hole name in-hole in-named-hole side-condition cross) @(schemegrammar* #:literals (any number string variable variable-except variable-prefix variable-not-otherwise-mentioned hole name in-hole in-named-hole side-condition cross)
@ -125,12 +133,21 @@ language, used in various ways:
scheme-constant] scheme-constant]
[pattern-sequence [pattern-sequence
pattern pattern
... ;; literal ellipsis (code:line ... (code:comment "literal ellipsis"))
..._id]) ..._id])
The patterns match sexpressions. The _any_ pattern matches @itemize{
any sepxression. The _number_ pattern matches any
number. The _string_ pattern matches any string. Those three @item{The any
@;{@defpattech[any]}
pattern matches
any sepxression.}
@item{The number
@;{@defpattech[number]}
pattern matches any number.}}
The _string_ pattern matches any string. Those three
patterns may also be suffixed with an underscore and another patterns may also be suffixed with an underscore and another
identifier, in which case they bind the full name (as if it identifier, in which case they bind the full name (as if it
were an implicit `name' pattern) and match the portion were an implicit `name' pattern) and match the portion