;;;----- Licensing notice ---------------------------------------------------
;;;
-;;; This file is part of the Sensble Object Design, an object system for C.
+;;; This file is part of the Sensible Object Design, an object system for C.
;;;
;;; SOD is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;;--------------------------------------------------------------------------
;;; Toplevel syntax.
-(export 'module)
-
;;; Type names.
(define-pluggable-parser module typename (scanner pset)
;; constraint ::= id+
(declare (ignore pset))
(with-parser-context (token-scanner-context :scanner scanner)
- (parse (seq ("code"
- (reason :id)
- #\:
- (name :id)
- (constraints (? (seq (#\[
- (constraints (list (:min 1)
- (list (:min 1) :id)
- #\,))
- #\])
- constraints)))
- (fragment (parse-delimited-fragment scanner #\{ #\})))
- (add-to-module *module* (make-instance 'code-fragment-item
- :fragment fragment
- :constraints constraints
- :reason reason
- :name name))))))
+ (flet ((kw ()
+ (parse (seq ((kw :id)) (intern (string-upcase kw) 'keyword)))))
+ (parse (seq ("code"
+ (reason (kw))
+ #\:
+ (name (kw))
+ (constraints (? (seq (#\[
+ (constraints (list (:min 1)
+ (list (:min 1) (kw))
+ #\,))
+ #\])
+ constraints)))
+ (fragment (parse-delimited-fragment scanner #\{ #\})))
+ (add-to-module *module*
+ (make-instance 'code-fragment-item
+ :fragment fragment
+ :constraints constraints
+ :reason reason
+ :name name)))))))
;;; External files.
-(defun read-module (pathname &key (truename (truename pathname)) location)
+(export 'read-module)
+(defun read-module (pathname &key (truename nil truep) location)
"Parse the file at PATHNAME as a module, returning it.
This is the main entry point for parsing module files. You may well know
`file-location' object, though it might be anything other than `t' which
can be printed in the event of circular imports."
+ (setf pathname (merge-pathnames pathname
+ (make-pathname :type "SOD" :case :common)))
+ (unless truep (setf truename (truename pathname)))
(define-module (pathname :location location :truename truename)
(with-open-file (f-stream pathname :direction :input)
(let* ((*readtable* (copy-readtable))
;;;--------------------------------------------------------------------------
;;; Class declarations.
+(export 'class-item)
+
(defun parse-class-body (scanner pset name supers)
;; class-body ::= `{' class-item* `}'
;;
(parse-message-item (sub-pset type name)
;; message-item ::=
;; declspec+ declarator -!- (method-body | `;')
- (make-sod-message class name type sub-pset scanner)
- (parse (or #\; (parse-method-item sub-pset
- type nick name))))
+ ;;
+ ;; Don't allow a method-body here if the message takes a
+ ;; varargs list, because we don't have a name for the
+ ;; `va_list' parameter.
+ (let ((message (make-sod-message class name type
+ sub-pset scanner)))
+ (if (varargs-message-p message)
+ (parse #\;)
+ (parse (or #\; (parse-method-item sub-pset
+ type nick name))))))
(parse-method-item (sub-pset type sub-nick name)
;; method-item ::=
;;
;; Return (VALUE-KIND . VALUE-FORM), ready for passing to a
;; `sod-initializer' constructor.
- (parse (or (peek (seq (#\= (frag (parse-delimited-fragment
- scanner #\{ #\})))
- (cons :compound frag)))
- (seq ((frag (parse-delimited-fragment
- scanner #\= '(#\; #\,)
- :keep-end t)))
- (cons :simple frag)))))
+
+ ;; This is kind of tricky because we have to juggle both
+ ;; layers of the parsing machinery. The character scanner
+ ;; will already have consumed the lookahead token (which, if
+ ;; we're going to do anything, is `=').
+ (let ((char-scanner (token-scanner-char-scanner scanner)))
+
+ ;; First, skip the character-scanner past any whitespace.
+ ;; We don't record this consumption, which is a bit
+ ;; naughty, but nobody will actually mind.
+ (loop
+ (when (or (scanner-at-eof-p char-scanner)
+ (not (whitespace-char-p
+ (scanner-current-char char-scanner))))
+ (return))
+ (scanner-step char-scanner))
+
+ ;; Now maybe read an initializer.
+ (cond ((not (eql (token-type scanner) #\=))
+ ;; It's not an `=' after all. There's no
+ ;; initializer.
+ (values '(#\=) nil nil))
+
+ ((and (not (scanner-at-eof-p char-scanner))
+ (char= (scanner-current-char char-scanner)
+ #\{))
+ ;; There's a brace after the `=', so we should
+ ;; consume the `=' here, and read a compound
+ ;; initializer enclosed in braces.
+ (parse (seq (#\= (frag (parse-delimited-fragment
+ scanner #\{ #\})))
+ (cons :compound frag))))
+
+ (t
+ ;; No brace, so read from the `=' up to, but not
+ ;; including, the trailing `,' or `;' delimiter.
+ (parse (seq ((frag (parse-delimited-fragment
+ scanner #\= '(#\; #\,)
+ :keep-end t)))
+ (cons :simple frag)))))))
(parse-slot-item (sub-pset base-type type name)
;; slot-item ::=
(parse (seq (#\{
(nil (skip-many ()
(seq ((sub-pset (parse-property-set scanner))
- (nil (error ()
- (parse-raw-class-item sub-pset))))
+ (nil (parse-raw-class-item sub-pset)))
(check-unused-properties sub-pset))))
- #\})
+ (nil (error () #\})))
(finalize-sod-class class)
(add-to-module *module* class)))))))
~mdw / sod / blobdiff