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Move memoization to utility module #61

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merged 1 commit into from
Aug 12, 2024
Merged

Move memoization to utility module #61

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64 changes: 30 additions & 34 deletions core.rkt
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@
(except-in pretty-expressive flatten)
"common.rkt"
"params.rkt"
"private/memoize.rkt"
(for-syntax racket/base syntax/parse/lib/function-header))

(define (extract xs extract-configs)
Expand All @@ -46,45 +47,40 @@
(define (pretty-comment comment d)
(if comment (full (<s> d (text comment))) d))

(define (memoize f #:backend [backend make-weak-hasheq])
(define table (backend))
(λ (x) (hash-ref! table x (λ () (f x)))))

(define (big-text s)
(reset (u-concat (add-between (map text (string-split s "\n")) hard-nl))))

(define (pretty-doc xs hook)
(define loop
(memoize (λ (d)
(match d
[(newl n) (full (v-concat (make-list n empty-doc)))]
[(full-atom _ content 'string)
(full (big-text content))]
[(atom comment content type)
(pretty-comment
comment
(match type
['block-comment (big-text content)]
[_ (text content)]))]
[(line-comment comment) (full (text comment))]
[(node _ _ _ _ xs)
(match (extract xs (list #f))
[#f ((hook #f) d)]
[(list (list (atom _ content 'symbol)) _ _) ((hook content) d)]
[_ ((hook #f) d)])]
[(wrapper comment tok content)
(pretty-comment comment (<+> (text tok) (loop content)))]
[(sexp-comment comment style tok xs)
(pretty-comment comment
(match style
['newline (apply <$> (text tok) (map loop xs))]
['any
(define :x (loop (first xs)))
(alt (<$> (text tok) :x) (<+> (text tok) :x))]
['disappeared (loop (first xs))]))]))))
(define/memoize (loop d)
(match d
[(newl n) (full (v-concat (make-list n empty-doc)))]
[(full-atom _ content 'string)
(full (big-text content))]
[(atom comment content type)
(pretty-comment
comment
(match type
['block-comment (big-text content)]
[_ (text content)]))]
[(line-comment comment) (full (text comment))]
[(node _ _ _ _ xs)
(match (extract xs (list #f))
[#f ((hook #f) d)]
[(list (list (atom _ content 'symbol)) _ _) ((hook content) d)]
[_ ((hook #f) d)])]
[(wrapper comment tok content)
(pretty-comment comment (<+> (text tok) (loop content)))]
[(sexp-comment comment style tok xs)
(pretty-comment comment
(match style
['newline (apply <$> (text tok) (map loop xs))]
['any
(define :x (loop (first xs)))
(alt (<$> (text tok) :x) (<+> (text tok) :x))]
['disappeared (loop (first xs))]))]))
(set-box! current-pretty loop)
(begin0 (v-concat (map loop xs))
(set-box! current-pretty #f)))
(set-box! current-pretty #f)))

(define (pretty-node* n d #:node [the-node n] #:unfits [unfits '()] #:adjust [adjust '("(" ")")])
(match-define (node comment opener closer prefix _) the-node)
Expand Down Expand Up @@ -168,7 +164,7 @@
body ...]
[_
(match/extract -xs #:as unfits tail
. rst)]))]
. rst)]))]
[(_ xs #:as unfits tail [#:else body ...+])
#'(let ()
body ...)])
12 changes: 12 additions & 0 deletions private/memoize.rkt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
#lang racket/base

(provide define/memoize)

(require syntax/parse/define)

(define (memoize f #:backend [backend make-weak-hasheq])
(define table (backend))
(λ (x) (hash-ref! table x (λ () (f x)))))

(define-syntax-parse-rule (define/memoize (function:id arg:id) body:expr ...+)
(define function (memoize (λ (arg) body ...))))
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