cf9b0f774b
Also: - remove the restriction on the use of unquote in define-judgment-form - allows limited use (I modes only) of judgment-forms in terms - allows the use of define-relation with the search/unification based random term generation
85 lines
3.5 KiB
Racket
85 lines
3.5 KiB
Racket
#lang racket/base
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(require (for-template racket/base "defined-checks.rkt"))
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(provide make-term-fn
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term-fn?
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term-fn-get-id
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(struct-out term-id)
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(struct-out judgment-form)
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(struct-out defined-term)
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defined-term-id?
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defined-check
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not-expression-context
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metafunc-proc-pict-info
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metafunc-proc-lang
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metafunc-proc-multi-arg?
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metafunc-proc-name
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metafunc-proc-in-dom?
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metafunc-proc-dom-pat
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metafunc-proc-cases
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metafunc-proc-gen-clauses
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metafunc-proc-lhs-pats
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metafunc-proc?
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make-metafunc-proc
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make-language-id
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language-id-nts
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pattern-symbols)
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(define-values (struct-type make-term-fn term-fn? term-fn-get term-fn-set!)
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(make-struct-type 'term-fn #f 1 0))
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(define term-fn-get-id (make-struct-field-accessor term-fn-get 0))
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(define-struct term-id (id depth))
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(define (transformer-predicate p? stx)
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(and (identifier? stx)
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(cond [(syntax-local-value stx (λ () #f)) => p?]
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[else #f])))
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(define-struct judgment-form (name mode proc mk-proc lang lws rule-names gen-clauses mk-gen-clauses term-proc relation?)
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#:transparent)
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(define-struct defined-term (value))
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(define (defined-term-id? stx)
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(transformer-predicate defined-term? stx))
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(define (defined-check id desc #:external [external id])
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(if (eq? (identifier-binding id) 'lexical)
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(quasisyntax/loc external (check-defined-lexical #,id '#,external #,desc))
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(quasisyntax/loc external (check-defined-module (λ () #,id) '#,external #,desc))))
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(define (not-expression-context stx)
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(when (eq? (syntax-local-context) 'expression)
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(raise-syntax-error #f "not allowed in an expression context" stx)))
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(define-values (language-id make-language-id language-id? language-id-get language-id-set) (make-struct-type 'language-id #f 2 0 #f '() #f 0))
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(define (language-id-nts stx id) (language-id-getter stx id 1))
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(define (language-id-getter stx id n)
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(unless (identifier? stx)
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(raise-syntax-error id "expected an identifier defined by define-language" stx))
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(let ([val (syntax-local-value stx (λ () #f))])
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(unless (and (set!-transformer? val)
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(language-id? (set!-transformer-procedure val)))
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(raise-syntax-error id "expected an identifier defined by define-language" stx))
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(language-id-get (set!-transformer-procedure val) n)))
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(define pattern-symbols '(any number natural integer real string variable
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variable-not-otherwise-mentioned hole symbol))
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(define-values (struct:metafunc-proc make-metafunc-proc metafunc-proc? metafunc-proc-ref metafunc-proc-set!)
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(make-struct-type 'metafunc-proc #f 10 0 #f null (current-inspector) 0))
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(define metafunc-proc-pict-info (make-struct-field-accessor metafunc-proc-ref 1))
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(define metafunc-proc-lang (make-struct-field-accessor metafunc-proc-ref 2))
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(define metafunc-proc-multi-arg? (make-struct-field-accessor metafunc-proc-ref 3))
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(define metafunc-proc-name (make-struct-field-accessor metafunc-proc-ref 4))
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(define metafunc-proc-in-dom? (make-struct-field-accessor metafunc-proc-ref 5))
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(define metafunc-proc-dom-pat (make-struct-field-accessor metafunc-proc-ref 6))
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(define metafunc-proc-cases (make-struct-field-accessor metafunc-proc-ref 7))
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(define metafunc-proc-gen-clauses (make-struct-field-accessor metafunc-proc-ref 8))
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(define metafunc-proc-lhs-pats (make-struct-field-accessor metafunc-proc-ref 9))
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