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Support loading of compiled syncase macros

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* ice-9/syncase.scm (current-eval-closure): New procedure.
  (env->eval-closure): Don't default to the root module: if we have no
  environment, we default to the current module via the logic in
  current-eval-closure. This is because psyntax's compilation mode
  doesn't know about guile modules, and thus won't dump the code to
  twiddle the current eval closure.
  (putprop, getprop, guile-macro): Use `current-eval-closure'.
  At the end, leave the expansion-eval-closure set to #f.
This commit is contained in:
Andy Wingo 2008-05-19 12:19:28 +02:00
parent 2b70bf0eb3
commit 6b1a13744b
1 changed files with 8 additions and 7 deletions
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15
ice-9/syncase.scm
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@ -35,11 +35,12 @@
(define expansion-eval-closure (make-fluid))
(define (current-eval-closure)
(or (fluid-ref expansion-eval-closure)
(module-eval-closure (current-module))))
(define (env->eval-closure env)
(or (and env
(car (last-pair env)))
(module-eval-closure the-root-module)))
(and env (car (last-pair env))))
(define sc-macro
(procedure->memoizing-macro
@ -107,7 +108,7 @@
(fluid-set! expansion-eval-closure the-syncase-eval-closure)
(define (putprop symbol key binding)
(let* ((eval-closure (fluid-ref expansion-eval-closure))
(let* ((eval-closure (current-eval-closure))
;; Why not simply do (eval-closure symbol #t)?
;; Answer: That would overwrite imported bindings
(v (or (eval-closure symbol #f) ;lookup
@ -122,7 +123,7 @@
(set-object-property! v key binding)))
(define (getprop symbol key)
(let* ((v ((fluid-ref expansion-eval-closure) symbol #f)))
(let* ((v ((current-eval-closure) symbol #f)))
(and v
(or (object-property v key)
(and (variable-bound? v)
@ -137,7 +138,7 @@
(if (symbol? e)
;; pass the expression through
e
(let* ((eval-closure (fluid-ref expansion-eval-closure))
(let* ((eval-closure (current-eval-closure))
(m (variable-ref (eval-closure (car e) #f))))
(if (eq? (macro-type m) 'syntax)
;; pass the expression through
@ -244,4 +245,4 @@
;(eval-case ((load-toplevel) (export-syntax name)))
(define-syntax name rules ...)))))
(fluid-set! expansion-eval-closure (env->eval-closure #f))
(fluid-set! expansion-eval-closure #f)