Support for comments with the new comment-reader
This commit is contained in:
Georges Dupéron
parent
5145a9cb7e
commit
a51bf4c1a1
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@ -1,3 +1,6 @@
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;; Copied and modified from https://github.com/racket/scribble/blob/
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;; 31ad440b75b189a2b0838aab011544d44d6b580/
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;; scribble-lib/scribble/comment-reader.rkt
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(module comment-reader scheme/base
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(require (only-in racket/port peeking-input-port))
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@ -23,42 +26,50 @@
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(begin (read port) (read port))
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'unsyntax)))
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(define (make-comment-readtable #:readtable [rt (current-readtable)])
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(define (make-comment-readtable #:readtable [rt (current-readtable)]
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#:comment-wrapper [comment-wrapper 'code:comment])
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(make-readtable rt
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#\; 'terminating-macro
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(case-lambda
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[(char port)
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(do-comment port (lambda () (read/recursive port #\@)))]
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(do-comment port
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(lambda () (read/recursive port #\@))
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#:comment-wrapper comment-wrapper)]
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[(char port src line col pos)
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(let ([v (do-comment port (lambda () (read-syntax/recursive src port #\@)))])
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(let ([v (do-comment port
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(lambda () (read-syntax/recursive src port #\@))
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#:comment-wrapper comment-wrapper)])
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(let-values ([(eline ecol epos) (port-next-location port)])
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(datum->syntax
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#f
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v
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(list src line col pos (and pos epos (- epos pos))))))])))
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(define (do-comment port recur)
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(let loop ()
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(when (equal? #\; (peek-char port))
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(read-char port)
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(loop)))
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(when (equal? #\space (peek-char port))
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(read-char port))
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`(code:comment
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(,(unsyntaxer)
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(t
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,@(append-strings
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(let loop ()
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(let ([c (read-char port)])
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(cond
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[(or (eof-object? c)
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(char=? c #\newline))
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null]
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[(char=? c #\@)
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(cons (recur) (loop))]
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[else
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(cons (string c)
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(loop))]))))))))
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(define (do-comment port
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recur
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#:comment-wrapper [comment-wrapper 'code:comment])
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#;(let loop ()
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(when (equal? #\; (peek-char port))
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(read-char port)
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(loop)))
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#;(when (equal? #\space (peek-char port))
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(read-char port))
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(define comment-text
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`(,(unsyntaxer)
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(t
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,@(append-strings
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(let loop ()
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(let ([c (read-char port)])
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(cond
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[(or (eof-object? c)
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(char=? c #\newline))
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null]
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[(char=? c #\@)
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(cons (recur) (loop))]
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[else
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(cons (string c)
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(loop))])))))))
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`(,comment-wrapper ,comment-text))
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(define (append-strings l)
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(let loop ([l l][s null])
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11
info.rkt
11
info.rkt
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@ -8,7 +8,8 @@
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"typed-racket-lib"
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"typed-racket-more"
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"typed-racket-doc"
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"scribble-enhanced"))
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"scribble-enhanced"
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"sexp-diff"))
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(define build-deps '("scribble-lib"
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"racket-doc"
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"rackunit-doc"
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@ -16,6 +17,10 @@
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(define scribblings '(("scribblings/hyper-literate.scrbl" ())
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("test/test.hl.rkt" () (omit-start))
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("test/test2.hl.rkt" () (omit-start))))
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(define pkg-desc "Description Here")
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(define version "0.1")
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(define pkg-desc
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(string-append "Hyper-literate programming is to literate programming exactly"
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" what hypertext documents are to regular books and texts."
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" For now, this is based on scribble/lp2, and only contains"
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" some ε-improvements over it"))
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(define version "0.2")
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(define pkg-authors '(|Georges Dupéron|))
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@ -2,7 +2,8 @@
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(require racket/port)
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(provide read-syntax-whole-first-line)
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(provide read-whole-first-line
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read-syntax-whole-first-line)
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(define (read-line-length port)
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(let* ([peeking (peeking-input-port port)]
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@ -14,10 +15,16 @@
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(define (narrow-to-one-line port)
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(make-limited-input-port port (read-line-length port)))
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(define (read-syntax-whole-first-line source-name in)
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(define (read-*-whole-first-line rec-read in)
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(define in1 (narrow-to-one-line in))
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(let loop ([res '()])
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(define res+ (read-syntax source-name in1))
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(define res+ (rec-read in1))
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(if (eof-object? res+)
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(reverse res)
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(loop (cons res+ res)))))
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(loop (cons res+ res)))))
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(define (read-whole-first-line in)
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(read-*-whole-first-line (λ (in1) (read in1)) in))
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(define (read-syntax-whole-first-line source-name in)
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(read-*-whole-first-line (λ (in1) (read-syntax source-name in1)) in))
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@ -4,15 +4,351 @@
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racket/port
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racket/syntax
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syntax/strip-context
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"first-line-utils.rkt")
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"first-line-utils.rkt"
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(only-in "../comment-reader.rkt" make-comment-readtable))
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(provide meta-read-inside
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meta-read-syntax-inside)
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meta-read-syntax-inside
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restore-#%comment)
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(define (make-at-reader+comments #:syntax? [syntax? #t] #:inside? [inside? #f])
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(make-at-reader
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#:syntax? syntax?
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#:inside? inside?
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#:datum-readtable (λ (rt)
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(make-comment-readtable
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#:readtable rt
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#:comment-wrapper '#%comment))))
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(define (meta-read-inside in . args)
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(apply read-inside args))
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(define rd1 (read-whole-first-line in))
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(define rd (apply (make-at-reader+comments #:syntax? #f #:inside? #t)
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args))
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`(,rd1 . ,rd))
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(begin
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(require (rename-in syntax/parse [...+ …+])
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syntax/stx
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racket/match
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racket/set
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racket/list
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racket/function
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racket/vector
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racket/contract
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sexp-diff
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racket/pretty
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rackunit
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(only-in racket/base [... …])
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(for-syntax (rename-in racket/base [... …])))
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(define first-comments/c
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(flat-rec-contract R (cons/c (or/c #f (cons/c (syntax/c 'saved-props+srcloc)
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R)) #| nested |#
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(listof syntax?) #| comments |#)))
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(define comments-after/c
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(listof syntax?))
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(define/contract (with-first-comments e c)
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(-> syntax?
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(or/c #f first-comments/c)
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syntax?)
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(if (or (not c) (and (= (length c) 1) (not (first c))))
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e
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(syntax-property e 'first-comments c)))
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(define/contract (with-comments e c)
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(-> syntax? (or/c #f comments-after/c) syntax?)
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(if (or (not c) (null? c))
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e
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(syntax-property e 'comments-after c)))
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;; ([#%comment c1] a [#%comment c2] . ([#%comment c3] b [#%comment c4]))
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;; => (aᶜ² . (bᶜ⁴)⁻ᶜ³)⁻ᶜ¹
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;; (c1 a c2 . (c3 . (c4 b c5)))
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;; => (aᶜ² . (bᶜ⁵)⁻ᶜ³⁻⁻ᶜ⁴)⁻ᶜ¹
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;; (c1 a c2 . (c3 . (c4 c5)))
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;; => (aᶜ² . ()⁻ᶜ³⁻⁻ᶜ⁴ᶜ⁵)⁻ᶜ¹
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;; (c1 a (c2) b)
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;; => (a ()⁻ᶜ² b)⁻ᶜ¹
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;; (c1 a (c2 . b) c)
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;; => (a b⁻ᶜ² c)⁻ᶜ¹
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;; (c1 a (c2 . (c3 c4)) c)
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;; => (a ()⁻ᶜ²⁻⁻ᶜ³ᶜ⁴ c)⁻ᶜ¹
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(define (hide-#%comment stx)
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(match (syntax-e stx)
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[(not (? pair?))
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;; TODO: recurse down vectors etc.
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stx]
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[(list* e* ... rest)
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(syntax-parse e*
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#:datum-literals (#%comment)
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[({~and c₀ [#%comment . _]} …
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{~seq {~and eᵢ {~not [#%comment . _]}}
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{~and cᵢⱼ [#%comment . _]} …}
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…+)
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(define new-e* (map with-comments
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(map hide-#%comment
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(syntax->list #'(eᵢ …)))
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(map syntax->list
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(syntax->list #'((cᵢⱼ …) …)))))
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(define new-rest (if (null? rest)
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rest
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(hide-#%comment rest)))
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(with-first-comments
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(datum->syntax stx (append new-e* new-rest) stx stx)
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(cons #f (syntax->list #'(c₀ …))))]
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[({~and c₀ [#%comment . _]} …)
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(define new-rest (if (null? rest)
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rest
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(hide-#%comment rest)))
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(with-first-comments
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(with-comments
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(datum->syntax stx new-rest stx stx)
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(if (syntax? new-rest)
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(syntax-property new-rest 'comments-after)
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'()))
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(cons (if (syntax? new-rest)
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(cons (datum->syntax new-rest
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'saved-props+srcloc
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new-rest
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new-rest)
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(or (syntax-property new-rest 'first-comments)
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;; TODO: I'm dubious about this, better typecheck
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;; everything…
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(cons #f null)))
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#f)
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(syntax->list #'(c₀ …))))])]))
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(define/contract (extract-first-comments stx)
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(-> syntax? (or/c #f first-comments/c))
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(syntax-property stx 'first-comments))
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(define/contract (extract-comments-after stx)
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(-> syntax? (or/c #f comments-after/c))
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(syntax-property stx 'comments-after))
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(define (restore-#%comment stx
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#:replace-with (replace-with #f)
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#:scope [scope (datum->syntax #f 'zero)])
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(define (erase-props stx)
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(define stx* (if (syntax-property stx 'first-comments)
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(syntax-property stx 'first-comments #f)
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stx))
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(if (syntax-property stx* 'comments-after)
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(syntax-property stx* 'comments-after #f)
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stx*))
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(define (recur stx)
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(restore-#%comment stx #:replace-with replace-with #:scope scope))
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(define (replace-in commentᵢ)
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(syntax-parse commentᵢ
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#:datum-literals (#%comment)
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[({~and c #%comment} . rest)
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(datum->syntax commentᵢ
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`(,(datum->syntax #'c replace-with #'c #'c)
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. ,((make-syntax-delta-introducer
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scope
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(datum->syntax #f 'zero))
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#'rest
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'add))
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commentᵢ
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commentᵢ)]
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[_
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commentᵢ]))
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(define (replace-in-after comments)
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(if replace-with
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(if (eq? comments #f)
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comments
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(stx-map replace-in comments))
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comments))
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(define (replace-in-first first-comments)
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(define (replace-in-first1 first-comments)
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(if (eq? first-comments #f)
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first-comments
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(cons (cons (caar first-comments)
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(replace-in-first1 (cdar first-comments)))
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(stx-map replace-in (cdr first-comments)))))
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(if replace-with
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(if (eq? first-comments #f)
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first-comments
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(cons (replace-in-first1 (car first-comments))
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(stx-map replace-in (cdr first-comments))))
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first-comments))
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(match (syntax-e stx)
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[(list* e* ... rest)
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;; TODO: when extracting the comments properties, check that they have
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;; the right shape (listof syntax?) or (*list/c syntax? (list/c R))
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;; Or append-map when stx is a stx-list (not in a tail position for the
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;; comments-after)
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(define new-e*
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(append-map (λ (eᵢ)
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(cons (recur eᵢ)
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(or (replace-in-after (extract-comments-after eᵢ))
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'())))
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e*))
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(define new-rest
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(if (syntax? rest)
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(recur rest)
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;; TODO: handle vectors etc. here?
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rest))
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(define first-comments
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(or (replace-in-first (extract-first-comments stx))
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#f))
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(define (nest first-comments to-nest)
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(cond
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[(eq? first-comments #f)
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to-nest]
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[(eq? (car first-comments) #f)
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(append (cdr first-comments) to-nest)]
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[else
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(nest1 first-comments to-nest)]))
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(define (nest1 first-comments to-nest)
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(if (eq? first-comments #f)
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to-nest
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(append (cdr first-comments)
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(datum->syntax (caar first-comments)
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(nest (cdar first-comments) to-nest)))))
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(define new-stx
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(nest first-comments (append new-e* new-rest)))
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(erase-props (datum->syntax stx new-stx stx stx))]
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;; TODO: recurse down vectors etc.
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[(? vector? v)
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;; TODO: what if there is a first-comment property on the vector itself?
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(erase-props
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(datum->syntax stx
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(vector-map (λ (vᵢ)
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(recur vᵢ))
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v)
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stx
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stx))]
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[other
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'TODO…
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other]))
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(define (annotate-syntax e #:srcloc+scopes? [srcloc+scopes? #f])
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(cond
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[(syntax? e)
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(append
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(list 'syntax
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(append-map (λ (kᵢ)
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(if (and (or (eq? kᵢ 'first-comments)
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(eq? kᵢ 'comments-after))
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(not (syntax-property e kᵢ)))
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(list)
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(list kᵢ (syntax-property e kᵢ))))
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(syntax-property-symbol-keys e)))
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(if srcloc+scopes?
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(list (syntax-source e)
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(syntax-line e)
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(syntax-column e)
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(syntax-position e)
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(syntax-span e)
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(syntax-source-module e)
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(hash-ref (syntax-debug-info e) 'context))
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(list))
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(list (annotate-syntax (syntax-e e) #:srcloc+scopes? srcloc+scopes?)))]
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[(null? e)
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'null]
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[(list? e)
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(list 'list
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(map (λ (eᵢ) (annotate-syntax eᵢ #:srcloc+scopes? srcloc+scopes?))
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e))]
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[(pair? e)
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(list 'cons
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(annotate-syntax (car e) #:srcloc+scopes? srcloc+scopes?)
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(annotate-syntax (cdr e) #:srcloc+scopes? srcloc+scopes?))]
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[(vector? e)
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(list 'vector
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(immutable? e)
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(map (λ (eᵢ) (annotate-syntax eᵢ #:srcloc+scopes? srcloc+scopes?))
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(vector->list e)))]
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[(symbol? e)
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e]
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[(string? e)
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e]
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[else
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(raise-argument-error
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'annotate-syntax
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(string-append "a syntax object containing recursively on of the"
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" following: pair, null, vector, symbol, string")
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0
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e)]))
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(define (same-syntax! a b)
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(define answer (equal? (annotate-syntax a #:srcloc+scopes? #f)
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(annotate-syntax b #:srcloc+scopes? #f)))
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(unless answer
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(pretty-write
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(sexp-diff (annotate-syntax a)
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(annotate-syntax b)))
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(displayln a)
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(displayln b))
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answer)
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(define-syntax (check-same-syntax stx)
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(syntax-case stx ()
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[(_ a b)
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(datum->syntax #'here
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`(check-true (same-syntax! ,#'a ,#'b))
|
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stx)]))
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|
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(module+ test
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(require rackunit)
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(let ([stx #'(a b c)])
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(check-same-syntax stx (hide-#%comment stx))))
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(define round-trip (compose restore-#%comment hide-#%comment))
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|
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(module+ test
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(define-syntax (check-round-trip stx)
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(syntax-case stx ()
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[(_ a)
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(datum->syntax #'here
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`(begin
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(check-same-syntax (round-trip ,#'a) ,#'a)
|
||||
(check-equal? (syntax->datum (round-trip ,#'a))
|
||||
(syntax->datum ,#'a)))
|
||||
stx)]))
|
||||
|
||||
(check-round-trip #'(a (#%comment "b") c))
|
||||
|
||||
(check-round-trip #'((#%comment "0") (#%comment "1")
|
||||
a
|
||||
(#%comment "b")
|
||||
(#%comment "bb")
|
||||
c
|
||||
(#%comment "d")
|
||||
(#%comment "dd")))
|
||||
(check-round-trip #'([#%comment c1]
|
||||
a
|
||||
[#%comment c2]
|
||||
. ([#%comment c3] b [#%comment c4])))
|
||||
(check-round-trip #'([#%comment c1]
|
||||
a
|
||||
[#%comment c2]
|
||||
. ([#%comment c3]
|
||||
. ([#%comment c4] b [#%comment c5]))))
|
||||
(check-round-trip #'([#%comment c1]
|
||||
a
|
||||
[#%comment c2]
|
||||
. ([#%comment c3]
|
||||
. ([#%comment c4] [#%comment c5]))))
|
||||
(check-round-trip #'([#%comment c1]
|
||||
a
|
||||
([#%comment c2])
|
||||
b))
|
||||
(check-round-trip #'([#%comment c1]
|
||||
a
|
||||
([#%comment c2] . b)
|
||||
c)))
|
||||
;; TODO: test restore-comments on an expression which has an 'after-comments
|
||||
)
|
||||
|
||||
(define (meta-read-syntax-inside source-name in . args)
|
||||
(with-syntax* ([rd1 (read-syntax-whole-first-line source-name in)]
|
||||
[rd (apply read-syntax-inside source-name in args)])
|
||||
#'(rd1 . rd)))
|
||||
[rd (apply (make-at-reader+comments #:syntax? #t #:inside? #t)
|
||||
source-name
|
||||
in
|
||||
args)]
|
||||
[rd-hide (hide-#%comment #'rd)])
|
||||
#'(rd1 . rd-hide)))
|
||||
|
|
@ -9,7 +9,8 @@
|
|||
syntax/parse
|
||||
racket/syntax
|
||||
racket/struct
|
||||
syntax/srcloc))
|
||||
syntax/srcloc
|
||||
"../restore-comments.rkt"))
|
||||
|
||||
(begin-for-syntax
|
||||
;; maps chunk identifiers to a counter, so we can distinguish multiple uses
|
||||
|
|
@ -130,7 +131,11 @@
|
|||
(define-for-syntax ((make-chunk-display racketblock) stx)
|
||||
(syntax-parse stx
|
||||
;; no need for more error checking, using chunk for the code will do that
|
||||
[(_ original-name:id name:id stxn:number expr ...)
|
||||
[(_ (original-before-expr ...)
|
||||
original-name:id
|
||||
name:id
|
||||
stxn:number
|
||||
expr ...)
|
||||
(define n (syntax-e #'stxn))
|
||||
(define original-name:n (syntax-local-introduce
|
||||
(format-id #'original-name
|
||||
|
|
@ -150,6 +155,12 @@
|
|||
(and c (> c 2)))
|
||||
#`((subscript #,(format "~a" n)))
|
||||
#'()))
|
||||
;; Restore comments which have been read by the modified comment-reader
|
||||
;; and stashed away by read-syntax in "../lang/meta-first-line.rkt"
|
||||
(define/with-syntax (_ . expr*+comments)
|
||||
(restore-#%comment #'(original-before-expr ... expr ...)
|
||||
#:replace-with #'code:comment
|
||||
#:scope #'original-name))
|
||||
;; The (list) here could be important, to avoid the code being
|
||||
;; executed multiple times in weird ways, when pre-expanding.
|
||||
#`(list
|
||||
|
|
@ -167,13 +178,15 @@
|
|||
`(elem (prefixable
|
||||
,@(chunks-toc-prefix)
|
||||
tag))))))
|
||||
(#,racketblock . #,(strip-source #'(expr ...))
|
||||
))))]))
|
||||
(#,racketblock
|
||||
. #,(strip-source #'expr*+comments)))))]))
|
||||
|
||||
(define-for-syntax (make-chunk chunk-code chunk-display)
|
||||
(syntax-parser
|
||||
;; no need for more error checking, using chunk for the code will do that
|
||||
[(_ (~optional (~seq #:save-as save-as:id)) name:id expr ...)
|
||||
[(_ (~optional (~seq #:save-as save-as:id))
|
||||
{~and name:id original-before-expr}
|
||||
expr ...)
|
||||
(define n (get-chunk-number (syntax-local-introduce #'name)))
|
||||
(define/with-syntax name:n (format-id #'name "~a:~a" #'name (or n 1)))
|
||||
|
||||
|
|
@ -228,13 +241,18 @@
|
|||
(syntax-local-introduce
|
||||
(quote-syntax #,(strip-source #'(expr ...))))])
|
||||
#`(stx-chunk-display
|
||||
(original-before-expr)
|
||||
local-name
|
||||
newname
|
||||
stx-n
|
||||
local-expr (... ...)))])))
|
||||
;; The (list) here could be important, to avoid the code being
|
||||
;; executed multiple times in weird ways, when pre-expanding.
|
||||
#`(list (stx-chunk-display name name stx-n . #,(strip-source #'(expr ...))))))]))
|
||||
#`(list (stx-chunk-display (original-before-expr)
|
||||
name
|
||||
name
|
||||
stx-n
|
||||
. #,(strip-source #'(expr ...))))))]))
|
||||
|
||||
(define-syntax chunk-code (make-chunk-code #t))
|
||||
(define-syntax CHUNK-code (make-chunk-code #f))
|
||||
|
|
|
|||
3
restore-comments.rkt
Normal file
3
restore-comments.rkt
Normal file
|
|
@ -0,0 +1,3 @@
|
|||
#lang racket
|
||||
(require "lang/meta-first-line.rkt")
|
||||
(provide restore-#%comment)
|
||||
Loading…
Reference in New Issue
Block a user