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dead code elimination

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* module/ice-9/psyntax.scm: Remove commented-out definitions of `do' and
  `case'.
This commit is contained in:
Andy Wingo 2012-07-02 23:01:21 +02:00
parent b5f2625933
commit d0491c9a16
1 changed files with 0 additions and 53 deletions
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53
module/ice-9/psyntax.scm
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@ -2815,33 +2815,6 @@
(binding (car bindings)))
#'(let (binding) body))))))))
;; This definition of 'do' is never used, as it is immediately
;; replaced by the definition in boot-9.scm.
#;
(define-syntax do
(lambda (orig-x)
(syntax-case orig-x ()
((_ ((var init . step) ...) (e0 e1 ...) c ...)
(with-syntax (((step ...)
(map (lambda (v s)
(syntax-case s ()
(() v)
((e) #'e)
(_ (syntax-violation
'do "bad step expression"
orig-x s))))
#'(var ...)
#'(step ...))))
(syntax-case #'(e1 ...) ()
(() #'(let doloop ((var init) ...)
(if (not e0)
(begin c ... (doloop step ...)))))
((e1 e2 ...)
#'(let doloop ((var init) ...)
(if e0
(begin e1 e2 ...)
(begin c ... (doloop step ...)))))))))))
(define-syntax quasiquote
(let ()
(define (quasi p lev)
@ -2991,32 +2964,6 @@
"expression not valid outside of quasiquote"
x)))
;; This definition of 'case' is never used, as it is immediately
;; replaced by the definition in boot-9.scm. This version lacks
;; R7RS-mandated support for '=>'.
#;
(define-syntax case
(lambda (x)
(syntax-case x ()
((_ e m1 m2 ...)
(with-syntax
((body (let f ((clause #'m1) (clauses #'(m2 ...)))
(if (null? clauses)
(syntax-case clause (else)
((else e1 e2 ...) #'(begin e1 e2 ...))
(((k ...) e1 e2 ...)
#'(if (memv t '(k ...)) (begin e1 e2 ...)))
(_ (syntax-violation 'case "bad clause" x clause)))
(with-syntax ((rest (f (car clauses) (cdr clauses))))
(syntax-case clause (else)
(((k ...) e1 e2 ...)
#'(if (memv t '(k ...))
(begin e1 e2 ...)
rest))
(_ (syntax-violation 'case "bad clause" x
clause))))))))
#'(let ((t e)) body))))))
(define (make-variable-transformer proc)
(if (procedure? proc)
(let ((trans (lambda (x)