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;;;; Objective-CL, an Objective-C bridge for Common Lisp.
;;;; Copyright (C) 2007 Matthias Andreas Benkard.
;;;;
;;;; This program is free software: you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public License
;;;; as published by the Free Software Foundation, either version 3 of
;;;; the License, or (at your option) any later version.
;;;;
;;;; This program is distributed in the hope that it will be useful, but
;;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this program. If not, see
;;;; <http://www.gnu.org/licenses/>.
(in-package #:mulk.objective-cl)
(defun selector-load-time-form (method-name)
`(load-time-value (handler-case
(find-selector ',method-name)
(serious-condition ()
(warn
(make-condition 'simple-style-warning
:format-control
"~S designates an unknown ~
method selector."
:format-arguments
(list ',method-name)))
',method-name))))
;; Optimise constant method names away by converting them to selectors
;; at load-time.
;;
;; Optimise all (SELECTOR ...) forms. This is important in order to
;; make (FUNCALL (SELECTOR ...) ...) efficient.
(define-compiler-macro selector (&whole form method-name)
(if (constantp method-name)
(selector-load-time-form (eval method-name))
form))
;; Have PRIMITIVE-INVOKE take advantage of the compiler macro for
;; SELECTOR.
(define-compiler-macro primitive-invoke (&whole form
receiver method-name return-type
&rest args)
(if (constantp method-name)
`(primitive-invoke ,receiver (selector ,method-name) ,return-type ,@args)
form))
;; Do the same optimisations for INVOKE-BY-NAME as for PRIMITIVE-INVOKE.
(define-compiler-macro invoke-by-name (&whole form
receiver method-name &rest args)
(if (constantp method-name)
`(invoke-by-name ,receiver (selector ,method-name) ,@args)
form))
;; This compiler macro is a bit more complicated than the preceding
;; ones.
(define-compiler-macro invoke (&whole form
receiver message-start &rest message-components)
(multiple-value-bind (method-name args)
(split-method-call message-start message-components)
(if (and (listp method-name)
(every #'constantp method-name))
`(invoke-by-name ,receiver (selector ',(mapcar #'eval method-name))
,@args)
form)))
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