You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
31 lines
1.3 KiB
Racket
31 lines
1.3 KiB
Racket
7 years ago
|
#lang reader "../aoc-lang.rkt"
|
||
|
|
(provide (rename-out [#%mb #%module-begin]) ★ ★★)
|
||
|
|
|
||
|
|
(define-macro (#%mb (STARS) TOKS ...)
|
||
|
|
#`(#%module-begin
|
||
|
|
(time (STARS (vector (λ () TOKS) ...)))))
|
||
|
|
|
||
|
|
(define regs (make-hasheq))
|
||
|
|
(define last-sound-played (make-parameter #f))
|
||
|
|
(struct offset-signal (val))
|
||
|
|
(struct end-signal (val))
|
||
|
|
|
||
|
|
(provide snd set add mul mod rcv jgz)
|
||
|
|
(define-macro (value VAL) #'(let ([val 'VAL]) (if (number? val) val (hash-ref regs val))))
|
||
|
|
(define-macro (snd REG) #'(last-sound-played (hash-ref regs 'REG)))
|
||
|
|
(define-macro (set REG VAL) #'(hash-set! regs 'REG (value VAL)))
|
||
|
|
(define-macro (add REG VAL) #'(hash-update! regs 'REG (λ (val) (+ val (value VAL))) 0))
|
||
|
|
(define-macro (mul REG VAL) #'(hash-update! regs 'REG (λ (val) (* val (value VAL))) 0))
|
||
|
|
(define-macro (mod REG VAL) #'(hash-update! regs 'REG (λ (val) (modulo val (value VAL))) 0))
|
||
|
|
(define-macro (rcv REG) #'(unless (zero? (hash-ref regs 'REG)) (raise (last-sound-played))))
|
||
|
|
(define-macro (jgz REG VAL) #'(when (positive? (hash-ref regs 'REG)) (raise (offset-signal (value VAL)))))
|
||
|
|
|
||
|
|
(define (★ insts)
|
||
|
|
(with-handlers ([number? values])
|
||
|
|
(for/fold ([offset 0])
|
||
|
|
([i (in-naturals)])
|
||
|
|
(with-handlers ([offset-signal? (λ (os) (+ (offset-signal-val os) offset))])
|
||
|
|
(define proc (vector-ref insts offset))
|
||
|
|
(proc)
|
||
|
|
(add1 offset)))))
|
||
|
|
|