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75 lines
3.0 KiB
Racket
75 lines
3.0 KiB
Racket
#lang br/quicklang
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(require (for-syntax racket/string racket/sequence) racket/file rackunit)
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(define ore? number?)
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(define (make-reactor reax-output proc-or-ore [t (current-thread)])
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(let* ([ch (make-channel)]
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[r (thread (λ ()
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(define reax 0)
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(define reax-formula (match proc-or-ore
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[(? ore? ore) ore]
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[proc proc]))
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(let loop ([supply 0])
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(match (channel-get ch)
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['ore
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(channel-put ch (match reax-formula
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[(? ore? ore) (* ore reax)]
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[_ 0]))
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(loop supply)]
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['reset
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(set! reax 0)
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(channel-put ch always-evt)
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(loop 0)]
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[amt (let inner ([supply supply])
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(cond
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[(< supply amt)
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(set! reax (add1 reax))
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(unless (ore? reax-formula)
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(reax-formula))
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(inner (+ supply reax-output))]
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[else
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(channel-put ch always-evt)
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(loop (- supply amt))]))]))))])
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(λ (arg)
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(channel-put ch arg)
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(channel-get ch))))
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(define-syntax (handle stx)
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(syntax-case stx (ORE)
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[(_) #'(begin)]
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[(_ X ORE => Q ID) #'(define ID (make-reactor Q X))]
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[(_ ARG ... => Q ID)
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(with-syntax ([(PR ...)
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(for/list ([duo (in-slice 2 (reverse (syntax->datum #'(ARG ...))))])
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(list (datum->syntax stx (car duo))
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(cadr duo)))]
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[ID (datum->syntax stx (syntax->datum #'ID))])
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#'(define ID (make-reactor Q (λ () (sync PR ...)))))]))
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(define-syntax (total stx)
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(syntax-case stx ()
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[(_ ID ...)
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(with-syntax ([(ID ...) (for/list ([idstx (in-list (syntax->list #'(ID ...)))])
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(datum->syntax stx (syntax->datum idstx)))])
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#'(+ (ID 'ore) ...))]))
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(provide handle quote total void)
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(module+ reader
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(provide read-syntax)
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(define (read-syntax name ip)
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(define lns (for/list ([ln (in-list (port->lines ip))]
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#:when (positive? (string-length ln)))
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(string-replace ln "," "")))
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(define src-datums (format-datums '(handle ~a) lns))
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(datum->syntax #f `(module _ "14.rkt"
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,@src-datums
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(void (FUEL 1))
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(total ,@(map last src-datums))))))
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(define-macro (mb ARG ...)
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(with-syntax ([FUEL (datum->syntax caller-stx 'FUEL)])
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#'(#%module-begin
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ARG ...)))
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(provide (rename-out [mb #%module-begin]))
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