f2dc2027f6
in the original GitHub fork: https://github.com/ntoronto/racket Some things about this are known to be broken (most egregious is that the array tests DO NOT RUN because of a problem in typed/rackunit), about half has no coverage in the tests, and half has no documentation. Fixes and docs are coming. This is committed now to allow others to find errors and inconsistency in the things that appear to be working, and to give the author a (rather incomplete) sense of closure.
65 lines
2.6 KiB
Racket
65 lines
2.6 KiB
Racket
#lang racket/base
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(require (for-syntax racket/base
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syntax/parse)
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typed/racket/base
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"mutable-array.rkt"
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"utils.rkt")
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(provide for/array:
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for*/array:
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for/array
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for*/array)
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(define-syntax (base-for/array: stx)
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(syntax-parse stx #:literals (:)
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[(_ name:id for/vector:id #:shape ds-expr:expr (~optional (~seq #:fill fill-expr:expr))
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(clause ...) (~optional (~seq : A:expr)) body:expr ...+)
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(with-syntax ([(maybe-fill ...) (if (attribute fill-expr) #'(#:fill fill-expr) #'())]
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[(maybe-type ...) (if (attribute A) #'(: A) #'())])
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(syntax/loc stx
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(let*: ([ds : User-Indexes ds-expr]
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[ds : Indexes (check-array-shape
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ds (λ () (raise-argument-error 'name "Indexes" ds)))])
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(define vs (for/vector #:length (array-shape-size ds) maybe-fill ...
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(clause ...) maybe-type ... body ...))
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(unsafe-mutable-array ds vs))))]
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[(_ name:id for/vector:id (clause ...) (~optional (~seq : A:expr)) body:expr ...+)
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(with-syntax ([(maybe-type ...) (if (attribute A) #'(: A) #'())])
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(syntax/loc stx
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(let ()
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(define vs (for/vector (clause ...) maybe-type ... body ...))
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(define ds ((inst vector Index) (vector-length vs)))
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(unsafe-mutable-array ds vs))))]))
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(define-syntax-rule (for/array: e ...)
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(base-for/array: for/array: for/vector: e ...))
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(define-syntax-rule (for*/array: e ...)
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(base-for/array: for*/array: for*/vector: e ...))
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(define-syntax (base-for/array stx)
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(syntax-parse stx
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[(_ name:id for/vector:id #:shape ds-expr:expr (~optional (~seq #:fill fill-expr:expr))
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(clause ...) body:expr ...+)
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(with-syntax ([(maybe-fill ...) (if (attribute fill-expr) #'(#:fill fill-expr) #'())])
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(syntax/loc stx
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(let* ([ds ds-expr]
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[ds (check-array-shape
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ds (λ () (raise-argument-error 'name "Indexes" ds)))])
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(define vs (for/vector #:length (array-shape-size ds) maybe-fill ...
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(clause ...) body ...))
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(unsafe-mutable-array ds vs))))]
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[(_ name:id for/vector:id (clause ...) body:expr ...+)
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(syntax/loc stx
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(let ()
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(define vs (for/vector (clause ...) body ...))
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(define ds ((inst vector Index) (vector-length vs)))
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(unsafe-mutable-array ds vs)))]))
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(define-syntax-rule (for/array e ...)
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(base-for/array for/array for/vector e ...))
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(define-syntax-rule (for*/array e ...)
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(base-for/array for*/array for*/vector e ...))
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