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)
117 lines
3.9 KiB
Racket
117 lines
3.9 KiB
Racket
#lang racket/base
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(require scribble/manual
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scribble/eval
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racket/sandbox)
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(provide ellipses
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the-eval
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myexamples
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myinteraction)
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(define ellipses (scheme ...))
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(define (fixup exn)
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(let ([src (ormap values (exn:fail:syntax-exprs exn))])
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(if src
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(make-exn:fail:syntax
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(format "~a at: ~s" (exn-message exn) (syntax->datum src))
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(exn-continuation-marks exn)
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(exn:fail:syntax-exprs exn))
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exn)))
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(define the-eval
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(parameterize ((sandbox-output 'string)
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(sandbox-error-output 'string)
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(sandbox-make-code-inspector current-code-inspector)
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(sandbox-eval-handlers
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(list #f
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(lambda (thunk)
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(with-handlers ([exn:fail:syntax?
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(lambda (e) (raise (fixup e)))])
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(thunk))))))
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(make-evaluator 'racket/base
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#:requires (let ([mods '(syntax/parse
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syntax/parse/debug
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syntax/parse/experimental/splicing
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syntax/parse/experimental/contract
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syntax/parse/experimental/reflect
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syntax/parse/experimental/eh)])
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`((for-syntax racket/base ,@mods)
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,@mods)))))
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(the-eval '(error-print-source-location #f))
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(define-syntax-rule (myexamples e ...)
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(examples #:eval the-eval e ...))
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(define-syntax-rule (myinteraction e ...)
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(interaction #:eval the-eval e ...))
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;; ----
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(define Spattern "single-term pattern")
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(define Lpattern "list pattern")
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(define Hpattern "head pattern")
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(define EHpattern "ellipsis-head pattern")
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(define Apattern "action pattern")
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(define Spatterns "single-term patterns")
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(define Lpatterns "list patterns")
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(define Hpatterns "head patterns")
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(define EHpatterns "ellipsis-head patterns")
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(define Apatterns "action patterns")
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(provide Spattern
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Lpattern
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Hpattern
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EHpattern
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Apattern
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Spatterns
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Lpatterns
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Hpatterns
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EHpatterns
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Apatterns)
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;; ----
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(define-syntax-rule (defhere id) (defidentifier #'id #:form? #t))
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(define-syntax ref
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(syntax-rules ()
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[(ref id suffix ...)
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(elemref (list 'pattern-link (list 'id 'suffix ...))
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(schemekeywordfont (symbol->string 'id))
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(superscript (symbol->string 'suffix)) ...
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#:underline? #f)]))
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(define-syntax def
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(syntax-rules ()
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[(def id suffix ...)
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(elemtag (list 'pattern-link (list 'id 'suffix ...))
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(scheme id)
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#|(superscript (symbol->string 'suffix)) ...|# )]))
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(provide defhere
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ref
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def)
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;; ----
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(require (for-label racket/base
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racket/contract
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(except-in syntax/parse ...+)
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syntax/parse/debug
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syntax/parse/experimental/contract
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syntax/parse/experimental/splicing
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syntax/parse/experimental/reflect
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syntax/parse/experimental/provide
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syntax/parse/experimental/eh
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"parse-dummy-bindings.rkt"))
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(provide (for-label (all-from-out racket/base)
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(all-from-out racket/contract)
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(all-from-out syntax/parse)
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(all-from-out syntax/parse/debug)
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(all-from-out syntax/parse/experimental/contract)
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(all-from-out syntax/parse/experimental/splicing)
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(all-from-out syntax/parse/experimental/reflect)
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(all-from-out syntax/parse/experimental/provide)
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(all-from-out syntax/parse/experimental/eh)
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(all-from-out "parse-dummy-bindings.rkt")))
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