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.
29 lines
1.2 KiB
Racket
29 lines
1.2 KiB
Racket
#lang debug racket/base
|
|
(require racket/match
|
|
"quad.rkt")
|
|
(provide (all-defined-out))
|
|
|
|
(struct compiler (passes)
|
|
#:constructor-name make-compiler
|
|
#:guard (λ (procs name)
|
|
(unless ((list-of procedure?) procs)
|
|
(raise-argument-error 'bad-input-to-compiler-constructor "list of procedures" procs))
|
|
procs)
|
|
#:property prop:procedure
|
|
(λ (self input) ((apply compose1 (reverse (compiler-passes self))) input)))
|
|
|
|
(define (compiler-append c passes)
|
|
(make-compiler (append (compiler-passes c) passes)))
|
|
|
|
(define-syntax-rule (define-pass (PASS-NAME ARG OTHER-ARG ...)
|
|
#:precondition PRECOND-PROC
|
|
#:postcondition POSTCOND-PROC
|
|
EXPRS ...)
|
|
(define PASS-NAME
|
|
(make-compiler (list (λ (ARG OTHER-ARG ...)
|
|
(unless (PRECOND-PROC ARG)
|
|
(error 'PASS-NAME (format "precondition failed: ~a for value ~v" 'PRECOND-PROC ARG)))
|
|
(define res (let () EXPRS ...))
|
|
(unless (POSTCOND-PROC res)
|
|
(error 'PASS-NAME (format "postcondition failed: ~a for value ~v" 'POSTCOND-PROC res)))
|
|
res))))) |