Work towards schema-to-pattern compiler
This commit is contained in:
parent
5c97661c73
commit
ac01ce4dfe
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@ -0,0 +1,240 @@
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#lang racket/base
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(provide (struct-out discard)
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(struct-out capture)
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(for-syntax analyse-pattern
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instantiate-pattern->pattern
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instantiate-pattern->value
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desc->key
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desc->skeleton-proj
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desc->skeleton-stx
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desc->capture-proj
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desc->capture-names
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desc->assertion-stx)
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(all-from-out "pattern-expander.rkt"))
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(require (for-syntax racket/base))
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(require (for-syntax racket/match))
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(require (for-syntax racket/struct-info))
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(require (for-syntax syntax/stx))
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(require "pattern-expander.rkt")
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(struct discard () #:prefab)
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(struct capture (detail) #:prefab)
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;;---------------------------------------------------------------------------
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;; ## Analysing patterns
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;;
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;; Patterns generate several pieces, which work together to form
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;; routing tables:
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;;
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;; - the *assertion* allows observers of observers to function;
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;; - the `Skeleton` classifies the shape of the pattern;
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;; - two `SkProj`s select constant and variable pieces from a pattern, respectively; and
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;; - a `SkKey` specifies constant pieces of a pattern, matched against one of the `SkProj`s.
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;;
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;; The other `SkProj` generates a second `SkKey` which is used as the
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;; input to a handler function.
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(define-for-syntax orig-insp
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(variable-reference->module-declaration-inspector (#%variable-reference)))
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(begin-for-syntax
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(define (dollar-id? stx)
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(and (identifier? stx)
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(char=? (string-ref (symbol->string (syntax-e stx)) 0) #\$)))
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(define (undollar stx)
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(and (dollar-id? stx)
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(datum->syntax stx (string->symbol (substring (symbol->string (syntax-e stx)) 1)))))
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(define (discard-id? stx)
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(and (identifier? stx)
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(free-identifier=? #'_ stx)))
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(define (id-value stx)
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(and (identifier? stx)
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(syntax-local-value stx (lambda () #f))))
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(define (list-id? stx)
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(and (identifier? stx)
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(free-identifier=? #'list stx)))
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(define (vector-id? stx)
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(and (identifier? stx)
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(free-identifier=? #'vector stx)))
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(define (analyse-pattern stx)
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(define disarmed-stx (syntax-disarm stx orig-insp))
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(syntax-case disarmed-stx ($ quasiquote unquote quote)
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[(expander args ...)
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(pattern-expander-id? #'expander)
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(pattern-expander-transform disarmed-stx
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(lambda (result)
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(analyse-pattern (syntax-rearm result stx))))]
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;; Extremely limited support for quasiquoting and quoting
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[(quasiquote (unquote p)) (analyse-pattern #'p)]
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[(quasiquote (p ...)) (analyse-pattern #'(list (quasiquote p) ...))]
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[(quasiquote p) (list 'atom stx)]
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[(quote p) (list 'atom stx)]
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[(ctor piece ...)
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(struct-info? (id-value #'ctor))
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(list* 'compound
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(extract-struct-info (id-value #'ctor))
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(stx-map analyse-pattern #'(piece ...)))]
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[(list piece ...)
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(list-id? #'list)
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(list* 'compound
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'list
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(stx-map analyse-pattern #'(piece ...)))]
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[(vector piece ...)
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(vector-id? #'vector)
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(list* 'compound
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'vector
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(stx-map analyse-pattern #'(piece ...)))]
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[id
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(dollar-id? #'id)
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(list 'capture (undollar #'id) (list 'discard))]
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[($ id p)
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(list 'capture #'id (analyse-pattern #'p))]
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[id
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(discard-id? #'id)
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(list 'discard)]
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[_
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(list 'atom stx)]))
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(define (instantiate-pattern->pattern stx)
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(define disarmed-stx (syntax-disarm stx orig-insp))
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(syntax-case disarmed-stx ($ quasiquote unquote quote)
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[(expander args ...)
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(pattern-expander-id? #'expander)
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(pattern-expander-transform disarmed-stx
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(lambda (result)
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(instantiate-pattern->pattern (syntax-rearm result stx))))]
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;; Extremely limited support for quasiquoting and quoting
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[(quasiquote (unquote p)) (instantiate-pattern->pattern #'p)]
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[(quasiquote (p ...)) (instantiate-pattern->pattern #'(list (quasiquote p) ...))]
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[(quasiquote p) stx]
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[(quote p) stx]
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[(ctor piece ...)
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(struct-info? (id-value #'ctor))
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(quasisyntax/loc stx (ctor #,@(stx-map instantiate-pattern->pattern #'(piece ...))))]
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[(list piece ...)
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(list-id? #'list)
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(quasisyntax/loc stx (list #,@(stx-map instantiate-pattern->pattern #'(piece ...))))]
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[(vector piece ...)
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(vector-id? #'vector)
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(quasisyntax/loc stx (vector #,@(stx-map instantiate-pattern->pattern #'(piece ...))))]
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[id
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(dollar-id? #'id)
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(undollar #'id)]
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[($ id p)
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#'id]
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[id
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(discard-id? #'id)
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#'id]
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[other
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#'other]))
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(define (instantiate-pattern->value stx)
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(define disarmed-stx (syntax-disarm stx orig-insp))
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(syntax-case disarmed-stx ($ quasiquote unquote quote)
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[(expander args ...)
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(pattern-expander-id? #'expander)
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(pattern-expander-transform disarmed-stx
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(lambda (result)
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(instantiate-pattern->value (syntax-rearm result stx))))]
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;; Extremely limited support for quasiquoting and quoting
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[(quasiquote (unquote p)) (instantiate-pattern->value #'p)]
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[(quasiquote (p ...)) (instantiate-pattern->value #'(list (quasiquote p) ...))]
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[(quasiquote p) stx]
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[(quote p) stx]
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[(ctor piece ...)
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(struct-info? (id-value #'ctor))
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(quasisyntax/loc stx (ctor #,@(stx-map instantiate-pattern->value #'(piece ...))))]
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[(list piece ...)
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(list-id? #'list)
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(quasisyntax/loc stx (list #,@(stx-map instantiate-pattern->value #'(piece ...))))]
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[(vector piece ...)
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(vector-id? #'vector)
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(quasisyntax/loc stx (vector #,@(stx-map instantiate-pattern->value #'(piece ...))))]
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[id
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(dollar-id? #'id)
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(undollar #'id)]
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[($ id p)
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#'id]
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[id
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(discard-id? #'id)
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#'(discard)]
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[other
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#'other])))
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;;---------------------------------------------------------------------------
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(begin-for-syntax
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(define (select-pattern-leaves desc capture-fn atom-fn)
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(define (walk-node key-rev desc)
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(match desc
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[`(compound ,_ ,pieces ...) (walk-edge 0 key-rev pieces)]
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[`(capture ,name-stx ,p) (append (capture-fn key-rev name-stx) (walk-node key-rev p))]
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[`(discard) (list)]
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[`(atom ,v) (atom-fn key-rev v)]))
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(define (walk-edge index key-rev pieces)
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(match pieces
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['() '()]
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[(cons p pieces) (append (walk-node (cons index key-rev) p)
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(walk-edge (+ index 1) key-rev pieces))]))
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(walk-node '() desc))
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(define (desc->key desc)
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(select-pattern-leaves desc
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(lambda (key-rev name-stx) (list))
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(lambda (key-rev atom) (list atom))))
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(define (desc->skeleton-proj desc)
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(select-pattern-leaves desc
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(lambda (key-rev name-stx) (list))
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(lambda (key-rev atom) (list (reverse key-rev)))))
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(define (desc->skeleton-stx desc)
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(match desc
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[`(compound list ,pieces ...)
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#`(list 'list #,@(map desc->skeleton-stx pieces))]
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[`(compound vector ,pieces ...)
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#`(list 'vector #,@(map desc->skeleton-stx pieces))]
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[`(compound (,struct-type ,_ctor ,_pred ,_getters ,_setters ,_super) ,pieces ...)
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#`(list #,struct-type #,@(map desc->skeleton-stx pieces))]
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[`(capture ,_ ,p) (desc->skeleton-stx p)]
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[`(discard) #'#f]
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[`(atom ,atom-stx) #'#f]))
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(define (desc->capture-proj desc)
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(select-pattern-leaves desc
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(lambda (key-rev name-stx) (list (reverse key-rev)))
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(lambda (key-rev atom) (list))))
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(define (desc->capture-names desc)
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(select-pattern-leaves desc
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(lambda (key-rev name-stx) (list name-stx))
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(lambda (key-rev atom) (list))))
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(define (desc->assertion-stx desc)
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(match desc
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[`(compound list ,pieces ...)
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#`(list #,@(map desc->assertion-stx pieces))]
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[`(compound vector ,pieces ...)
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#`(vector #,@(map desc->assertion-stx pieces))]
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[`(compound (,_struct-type ,ctor ,_pred ,_getters ,_setters ,_super) ,pieces ...)
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#`(#,ctor #,@(map desc->assertion-stx pieces))]
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[`(capture ,_ ,p) #`(capture #,(desc->assertion-stx p))]
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[`(discard) #'(discard)]
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[`(atom ,v) v]))
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)
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@ -1,42 +1,48 @@
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#lang racket/base
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(provide (struct-out discard)
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(struct-out capture)
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(for-syntax analyse-pattern
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instantiate-pattern->pattern
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instantiate-pattern->value
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desc->key
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desc->skeleton-proj
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desc->skeleton-stx
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desc->capture-proj
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desc->capture-names
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desc->assertion-stx)
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(all-from-out "pattern-expander.rkt"))
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(provide (for-syntax preserves-pattern-registry
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register-preserves-pattern!
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analyse-pattern
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analyse-pattern-bindings)
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define-preserves-pattern
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:pattern)
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(require (for-syntax racket/base))
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(require (for-syntax racket/match))
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(require (for-syntax racket/list))
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(require (for-syntax racket/struct-info))
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(require (for-syntax syntax/id-table))
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(require (for-syntax syntax/stx))
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(require "pattern-expander.rkt")
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(struct discard () #:prefab)
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(struct capture (detail) #:prefab)
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(require "pattern-expander.rkt")
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(require "schemas/gen/dataspace-patterns.rkt")
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;;---------------------------------------------------------------------------
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(define-for-syntax preserves-pattern-registry (make-free-id-table))
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(define-for-syntax (register-preserves-pattern! id-stx transformer)
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(free-id-table-set! preserves-pattern-registry id-stx transformer))
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(define-syntax (define-preserves-pattern stx)
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(syntax-case stx ()
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[(_ (ctor-stx field-stxs ...) pattern-stx bindings-stx)
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#'(begin (begin-for-syntax
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(register-preserves-pattern!
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#'ctor-stx
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(lambda (mode s)
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(match mode
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['pattern
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(syntax-case s ()
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[(_ field-stxs ...) pattern-stx]
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[_ (raise-syntax-error 'ctor-stx "Invalid pattern")])]
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['bindings
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(syntax-case s ()
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[(_ field-stxs ...) bindings-stx]
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[_ (raise-syntax-error 'ctor-stx "Invalid binding-pattern")])]))))
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(void))]))
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;;---------------------------------------------------------------------------
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;; ## Analysing patterns
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;;
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;; Patterns generate several pieces, which work together to form
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;; routing tables:
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;;
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;; - the *assertion* allows observers of observers to function;
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;; - the `Skeleton` classifies the shape of the pattern;
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;; - two `SkProj`s select constant and variable pieces from a pattern, respectively; and
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;; - a `SkKey` specifies constant pieces of a pattern, matched against one of the `SkProj`s.
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;;
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;; The other `SkProj` generates a second `SkKey` which is used as the
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;; input to a handler function.
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(define-for-syntax orig-insp
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(variable-reference->module-declaration-inspector (#%variable-reference)))
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@ -62,13 +68,35 @@
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(and (identifier? stx)
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(free-identifier=? #'list stx)))
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(define (vector-id? stx)
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(and (identifier? stx)
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(free-identifier=? #'vector stx)))
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(define (constructor-registered? stx)
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(free-id-table-ref preserves-pattern-registry stx #f))
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(define (member-entry key-stx pat-stx)
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(define analysed (analyse-pattern pat-stx))
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(syntax-case analysed (DDiscard)
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[(DDiscard) (list)]
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[_ (list key-stx analysed)]))
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(define (struct-label-and-arity id-stx actual-count)
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(match-define (list _type-stx ctor-stx pred-stx accessor-stxs _mutator-stxs _super)
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(extract-struct-info (id-value id-stx)))
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(define expected-count (length accessor-stxs))
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(when (not (= expected-count actual-count))
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(raise-syntax-error ':pattern
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(format "Expected ~a arguments to ~v, but got ~a"
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expected-count
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ctor-stx
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actual-count)))
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(values (syntax-e ctor-stx)
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expected-count))
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(define (analyse-pattern stx)
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(define disarmed-stx (syntax-disarm stx orig-insp))
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(syntax-case disarmed-stx ($ quasiquote unquote quote)
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[(ctor args ...)
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(constructor-registered? #'ctor)
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((free-id-table-ref preserves-pattern-registry #'ctor) 'pattern disarmed-stx)]
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[(expander args ...)
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(pattern-expander-id? #'expander)
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(pattern-expander-transform disarmed-stx
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@ -78,163 +106,89 @@
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;; Extremely limited support for quasiquoting and quoting
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[(quasiquote (unquote p)) (analyse-pattern #'p)]
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[(quasiquote (p ...)) (analyse-pattern #'(list (quasiquote p) ...))]
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[(quasiquote p) (list 'atom stx)]
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[(quote p) (list 'atom stx)]
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[(quasiquote p) #`(DLit 'p)]
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[(quote p) #`(DLit 'p)]
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[(ctor piece ...)
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(struct-info? (id-value #'ctor))
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(list* 'compound
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(extract-struct-info (id-value #'ctor))
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(stx-map analyse-pattern #'(piece ...)))]
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[(list piece ...)
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(list-id? #'list)
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(list* 'compound
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'list
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(stx-map analyse-pattern #'(piece ...)))]
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[(vector piece ...)
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(vector-id? #'vector)
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(list* 'compound
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'vector
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(stx-map analyse-pattern #'(piece ...)))]
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(let-values (((label arity) (struct-label-and-arity #'ctor)))
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#`(DCompound-rec '#,label
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#,arity
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(hasheqv #,@(append*
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(for/list [(n (in-naturals))
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(piece (in-list (syntax->list #'(piece ...))))]
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(member-entry n piece))))))]
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[(list-stx piece ...)
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(list-id? #'list-stx)
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#`(DCompound-arr #,(length (syntax->list #'(piece ...)))
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(hasheqv #,@(append*
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(for/list [(n (in-naturals))
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(piece (in-list (syntax->list #'(piece ...))))]
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(member-entry n piece)))))]
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[id
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(dollar-id? #'id)
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(list 'capture (undollar #'id) (list 'discard))]
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#`(DBind '#,(undollar #'id) (DDiscard))]
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[($ id p)
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(list 'capture #'id (analyse-pattern #'p))]
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#`(DBind 'id #,(analyse-pattern #'p))]
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[id
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(discard-id? #'id)
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(list 'discard)]
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[_
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(list 'atom stx)]))
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#`(DDiscard)]
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(define (instantiate-pattern->pattern stx)
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[other
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#`(DLit other)]))
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(define (analyse-pattern-bindings stx)
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(define disarmed-stx (syntax-disarm stx orig-insp))
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(syntax-case disarmed-stx ($ quasiquote unquote quote)
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[(ctor args ...)
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(constructor-registered? #'ctor)
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((free-id-table-ref preserves-pattern-registry #'ctor) 'bindings disarmed-stx)]
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[(expander args ...)
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(pattern-expander-id? #'expander)
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(pattern-expander-transform disarmed-stx
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(lambda (result)
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(instantiate-pattern->pattern (syntax-rearm result stx))))]
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(analyse-pattern-bindings (syntax-rearm result stx))))]
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;; Extremely limited support for quasiquoting and quoting
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[(quasiquote (unquote p)) (instantiate-pattern->pattern #'p)]
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[(quasiquote (p ...)) (instantiate-pattern->pattern #'(list (quasiquote p) ...))]
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[(quasiquote p) stx]
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[(quote p) stx]
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[(quasiquote (unquote p)) (analyse-pattern-bindings #'p)]
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[(quasiquote (p ...)) (analyse-pattern-bindings #'(list (quasiquote p) ...))]
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[(quasiquote _p) '()]
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[(quote _p) '()]
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|
||||
[(ctor piece ...)
|
||||
(struct-info? (id-value #'ctor))
|
||||
(quasisyntax/loc stx (ctor #,@(stx-map instantiate-pattern->pattern #'(piece ...))))]
|
||||
[(list piece ...)
|
||||
(list-id? #'list)
|
||||
(quasisyntax/loc stx (list #,@(stx-map instantiate-pattern->pattern #'(piece ...))))]
|
||||
[(vector piece ...)
|
||||
(vector-id? #'vector)
|
||||
(quasisyntax/loc stx (vector #,@(stx-map instantiate-pattern->pattern #'(piece ...))))]
|
||||
(append-map analyse-pattern-bindings (syntax->list #'(piece ...)))]
|
||||
|
||||
[(list-stx piece ...)
|
||||
(list-id? #'list-stx)
|
||||
(append-map analyse-pattern-bindings (syntax->list #'(piece ...)))]
|
||||
|
||||
[id
|
||||
(dollar-id? #'id)
|
||||
(undollar #'id)]
|
||||
(list (undollar #'id))]
|
||||
|
||||
[($ id p)
|
||||
#'id]
|
||||
(cons #'id (analyse-pattern-bindings #'p))]
|
||||
|
||||
[id
|
||||
(discard-id? #'id)
|
||||
#'id]
|
||||
'()]
|
||||
|
||||
[other
|
||||
#'other]))
|
||||
'()])))
|
||||
|
||||
(define (instantiate-pattern->value stx)
|
||||
(define disarmed-stx (syntax-disarm stx orig-insp))
|
||||
(syntax-case disarmed-stx ($ quasiquote unquote quote)
|
||||
[(expander args ...)
|
||||
(pattern-expander-id? #'expander)
|
||||
(pattern-expander-transform disarmed-stx
|
||||
(lambda (result)
|
||||
(instantiate-pattern->value (syntax-rearm result stx))))]
|
||||
(define-syntax (:pattern stx)
|
||||
(syntax-case stx ()
|
||||
[(_ pat-stx)
|
||||
(analyse-pattern #'pat-stx)]))
|
||||
|
||||
;; Extremely limited support for quasiquoting and quoting
|
||||
[(quasiquote (unquote p)) (instantiate-pattern->value #'p)]
|
||||
[(quasiquote (p ...)) (instantiate-pattern->value #'(list (quasiquote p) ...))]
|
||||
[(quasiquote p) stx]
|
||||
[(quote p) stx]
|
||||
|
||||
[(ctor piece ...)
|
||||
(struct-info? (id-value #'ctor))
|
||||
(quasisyntax/loc stx (ctor #,@(stx-map instantiate-pattern->value #'(piece ...))))]
|
||||
[(list piece ...)
|
||||
(list-id? #'list)
|
||||
(quasisyntax/loc stx (list #,@(stx-map instantiate-pattern->value #'(piece ...))))]
|
||||
[(vector piece ...)
|
||||
(vector-id? #'vector)
|
||||
(quasisyntax/loc stx (vector #,@(stx-map instantiate-pattern->value #'(piece ...))))]
|
||||
[id
|
||||
(dollar-id? #'id)
|
||||
(undollar #'id)]
|
||||
[($ id p)
|
||||
#'id]
|
||||
[id
|
||||
(discard-id? #'id)
|
||||
#'(discard)]
|
||||
[other
|
||||
#'other])))
|
||||
|
||||
;;---------------------------------------------------------------------------
|
||||
|
||||
(begin-for-syntax
|
||||
(define (select-pattern-leaves desc capture-fn atom-fn)
|
||||
(define (walk-node key-rev desc)
|
||||
(match desc
|
||||
[`(compound ,_ ,pieces ...) (walk-edge 0 key-rev pieces)]
|
||||
[`(capture ,name-stx ,p) (append (capture-fn key-rev name-stx) (walk-node key-rev p))]
|
||||
[`(discard) (list)]
|
||||
[`(atom ,v) (atom-fn key-rev v)]))
|
||||
(define (walk-edge index key-rev pieces)
|
||||
(match pieces
|
||||
['() '()]
|
||||
[(cons p pieces) (append (walk-node (cons index key-rev) p)
|
||||
(walk-edge (+ index 1) key-rev pieces))]))
|
||||
(walk-node '() desc))
|
||||
|
||||
(define (desc->key desc)
|
||||
(select-pattern-leaves desc
|
||||
(lambda (key-rev name-stx) (list))
|
||||
(lambda (key-rev atom) (list atom))))
|
||||
|
||||
(define (desc->skeleton-proj desc)
|
||||
(select-pattern-leaves desc
|
||||
(lambda (key-rev name-stx) (list))
|
||||
(lambda (key-rev atom) (list (reverse key-rev)))))
|
||||
|
||||
(define (desc->skeleton-stx desc)
|
||||
(match desc
|
||||
[`(compound list ,pieces ...)
|
||||
#`(list 'list #,@(map desc->skeleton-stx pieces))]
|
||||
[`(compound vector ,pieces ...)
|
||||
#`(list 'vector #,@(map desc->skeleton-stx pieces))]
|
||||
[`(compound (,struct-type ,_ctor ,_pred ,_getters ,_setters ,_super) ,pieces ...)
|
||||
#`(list #,struct-type #,@(map desc->skeleton-stx pieces))]
|
||||
[`(capture ,_ ,p) (desc->skeleton-stx p)]
|
||||
[`(discard) #'#f]
|
||||
[`(atom ,atom-stx) #'#f]))
|
||||
|
||||
(define (desc->capture-proj desc)
|
||||
(select-pattern-leaves desc
|
||||
(lambda (key-rev name-stx) (list (reverse key-rev)))
|
||||
(lambda (key-rev atom) (list))))
|
||||
|
||||
(define (desc->capture-names desc)
|
||||
(select-pattern-leaves desc
|
||||
(lambda (key-rev name-stx) (list name-stx))
|
||||
(lambda (key-rev atom) (list))))
|
||||
|
||||
(define (desc->assertion-stx desc)
|
||||
(match desc
|
||||
[`(compound list ,pieces ...)
|
||||
#`(list #,@(map desc->assertion-stx pieces))]
|
||||
[`(compound vector ,pieces ...)
|
||||
#`(vector #,@(map desc->assertion-stx pieces))]
|
||||
[`(compound (,_struct-type ,ctor ,_pred ,_getters ,_setters ,_super) ,pieces ...)
|
||||
#`(#,ctor #,@(map desc->assertion-stx pieces))]
|
||||
[`(capture ,_ ,p) #`(capture #,(desc->assertion-stx p))]
|
||||
[`(discard) #'(discard)]
|
||||
[`(atom ,v) v]))
|
||||
)
|
||||
(provide :bindings)
|
||||
(define-syntax (:bindings stx)
|
||||
(syntax-case stx ()
|
||||
[(_ pat-stx)
|
||||
#`(quote #,(analyse-pattern-bindings #'pat-stx))]))
|
||||
|
|
|
|||
|
|
@ -2,14 +2,104 @@
|
|||
|
||||
(provide schema-compiler-plugin)
|
||||
|
||||
(require racket/pretty)
|
||||
(require racket/match)
|
||||
(require (only-in racket/file make-parent-directory*))
|
||||
(require (only-in racket/syntax format-symbol))
|
||||
(require (only-in racket/list append* append-map))
|
||||
|
||||
(require preserves-schema/compiler)
|
||||
(require preserves-schema/type)
|
||||
(require preserves-schema/gen/schema)
|
||||
|
||||
(define (schema-compiler-plugin schema options)
|
||||
(match-define (schema-compiler-options _name
|
||||
lookup-module-path
|
||||
paths) options)
|
||||
(define ds-path (lookup-module-path '(dataspace-patterns)))
|
||||
(if (equal? ds-path (schema-translation-paths-relative-output-path paths))
|
||||
`(begin)
|
||||
`(begin (require (prefix-in :pat: ,ds-path)))))
|
||||
(define meta? (equal? ds-path (schema-translation-paths-relative-output-path paths)))
|
||||
|
||||
(define (N sym)
|
||||
(if meta?
|
||||
sym
|
||||
(format-symbol ":pat:~a" sym)))
|
||||
|
||||
(define (def-pattern name def)
|
||||
(define discard `(,(N 'DDiscard)))
|
||||
|
||||
(define (pat-pattern p)
|
||||
(match (unwrap p)
|
||||
[(NamedSimplePattern_ name p)
|
||||
`(:pattern ,(escape name))]
|
||||
[(SimplePattern-any) discard]
|
||||
[(SimplePattern-atom _atomKind) discard]
|
||||
[(SimplePattern-embedded _interface) discard]
|
||||
[(SimplePattern-lit value) `(,(N 'DLit) ',value)]
|
||||
[(SimplePattern-seqof pat) discard]
|
||||
[(SimplePattern-setof pat) discard]
|
||||
[(SimplePattern-dictof key-pat value-pat) discard]
|
||||
[(SimplePattern-Ref (Ref module-path name))
|
||||
`(:pattern-ref ,(format-symbol "~a~a" (module-path-prefix module-path) name))]
|
||||
[(CompoundPattern-rec label-pat fields-pat)
|
||||
(match* ((unwrap label-pat) (unwrap fields-pat))
|
||||
[((SimplePattern-lit label) (CompoundPattern-tuple field-pats))
|
||||
`(,(N 'DCompound-rec)
|
||||
',label
|
||||
,(length field-pats)
|
||||
(hasheqv ,@(append* (for/list [(i (in-naturals))
|
||||
(p (in-list field-pats))]
|
||||
(define s (pat-pattern p))
|
||||
(if (equal? s discard)
|
||||
`()
|
||||
`(,i ,s))))))]
|
||||
[(_ _) `#,(raise-syntax-error ',name "Record schema cannot be used as a pattern")])]
|
||||
[(CompoundPattern-tuple pats)
|
||||
`(,(N 'DCompound-arr)
|
||||
,(length pats)
|
||||
(hasheqv ,@(append* (for/list [(i (in-naturals))
|
||||
(p (in-list pats))]
|
||||
(define s (pat-pattern p))
|
||||
(if (equal? s discard)
|
||||
`()
|
||||
`(,i ,p))))))]
|
||||
[other (error 'pat-pattern "Unimplemented: ~v" other)]))
|
||||
|
||||
(define fields (match (definition-ty def)
|
||||
[(ty-unit) '()]
|
||||
[(ty-record fields) (map escape (map car fields))]
|
||||
[_ #f]))
|
||||
|
||||
(if (not fields)
|
||||
`(begin)
|
||||
`(define-preserves-pattern (,name ,@fields)
|
||||
,@(match def
|
||||
[(? Definition-or?)
|
||||
`((raise-syntax-error ',name "Union schema cannot be used as a pattern")
|
||||
(quasisyntax ()))]
|
||||
[(? Definition-and?)
|
||||
`((raise-syntax-error ',name "Intersection schema cannot be used as a pattern")
|
||||
(quasisyntax ()))]
|
||||
[(Definition-Pattern p)
|
||||
`((quasisyntax ,(pat-pattern p))
|
||||
(append ,@(for/list [(f (in-list fields))]
|
||||
`(analyse-pattern-bindings (syntax ,f)))))]))))
|
||||
|
||||
(define exprs
|
||||
`((require (prefix-in :pat: ,ds-path))
|
||||
(require syndicate/pattern)
|
||||
(require (for-syntax racket/base))
|
||||
,@(map-Schema-definitions def-pattern schema)))
|
||||
|
||||
(if meta?
|
||||
(let ((output-path (path-replace-extension
|
||||
(schema-translation-paths-full-output-path paths)
|
||||
".meta.rkt")))
|
||||
(make-parent-directory* output-path)
|
||||
(with-output-to-file output-path #:exists 'replace
|
||||
(lambda ()
|
||||
(displayln "#lang racket/base\n")
|
||||
(for [(e (in-list exprs))]
|
||||
(pretty-write e)
|
||||
(newline))))
|
||||
`(begin))
|
||||
`(begin ,@exprs)))
|
||||
|
|
|
|||
Loading…
Reference in New Issue