d7a87c79e0
Changed backtracking algorithm, runtime representations
- syntax classes, ~describe no longer implicitly commit
- ~describe no longer delimits effect of cut
Added keyword & optional args for stxclasses
Added ~do and #:do, ~post, ~commit and #:commit,
~delimit-cut and #:no-delimit-cut
Added syntax/parse/debug, syntax/parse/experimental/*
- expr/c for contracting macro sub-expressions
moved from syntax/parse to syntax/parse/experimental/contract
- syntax class reflection (~reflect, ~splicing-reflect)
- eh-alternative-sets (~eh-var)
- provide-syntax-class/contract
(only for params, not attrs so far)
Changed ~fail to not include POST progress (#:fail still does)
old (~fail _) is now (~post (~fail _))
Made msg argument of ~fail optional
Removed generic "repetition constraint violated" msg
Removed atom-in-list stxclass
Removed unnecessary datum->syntax on cdr of pair pattern
massive improvements to long-list microbenchmarks
Optimization: integrable syntax classes (id, expr, keyword)
need better measurements
Optimization: ad hoc elimination of head/tail choice point
for (EH ... . ()) patterns
Added unstable/wrapc (proc version of expr/c)
14 lines
531 B
Racket
14 lines
531 B
Racket
#lang racket/base
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(require racket/contract/base
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"parse/private/sc.rkt"
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"parse/private/litconv.rkt"
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"parse/private/lib.rkt"
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"parse/experimental/provide.rkt")
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(provide (except-out (all-from-out "parse/private/sc.rkt")
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parser/rhs)
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(all-from-out "parse/private/litconv.rkt")
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(except-out (all-from-out "parse/private/lib.rkt")
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static))
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(provide-syntax-class/contract
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[static (syntax-class/c [(-> any/c any/c) (or/c string? symbol? #f)])])
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