;;;----- 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)
- ;; `typename' ID ( `,' ID )* `;'
-
+(define-pluggable-parser module typename (scanner pset)
+ ;; `typename' id ( `,' id )* `;'
+ (declare (ignore pset))
(with-parser-context (token-scanner-context :scanner scanner)
(parse (and "typename"
(skip-many (:min 1)
;;; Fragments.
-(define-pluggable-parser module code (scanner)
- ;; `code' ID `:' ID [ CONSTRAINTS ] `{' C-FRAGMENT `}'
-
+(define-pluggable-parser module code (scanner pset)
+ ;; `code' id `:' id [constraints] `{' c-fragment `}'
+ ;;
+ ;; constrains ::= `[' constraint-list `]'
+ ;; 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))
:char-scanner char-scanner)))
(with-default-error-location (scanner)
(with-parser-context (token-scanner-context :scanner scanner)
- (parse (skip-many () (plug module scanner)))))))))
-
-(define-pluggable-parser module test (scanner)
- ;; `demo' STRING `;'
-
+ (parse (skip-many ()
+ (seq ((pset (parse-property-set scanner))
+ (nil (error ()
+ (plug module scanner pset))))
+ (check-unused-properties pset))))))))))
+
+(define-pluggable-parser module test (scanner pset)
+ ;; `demo' string `;'
+ (declare (ignore pset))
(with-parser-context (token-scanner-context :scanner scanner)
(parse (seq ("demo" (string :string) #\;)
(format t ";; DEMO ~S~%" string)))))
-(define-pluggable-parser module file (scanner)
- ;; `import' STRING `;'
- ;; `load' STRING `;'
-
+(define-pluggable-parser module file (scanner pset)
+ ;; `import' string `;'
+ ;; `load' string `;'
+ (declare (ignore pset))
(flet ((common (name type what thunk)
(find-file scanner
(merge-pathnames name
;;; Lisp escape.
-(define-pluggable-parser module lisp (scanner)
+(define-pluggable-parser module lisp (scanner pset)
;; `lisp' s-expression `;'
-
+ (declare (ignore pset))
(with-parser-context (token-scanner-context :scanner scanner)
(parse (seq ((sexp (if (and (eql (token-type scanner) :id)
(string= (token-value scanner) "lisp"))
;;;--------------------------------------------------------------------------
;;; Class declarations.
-(defun parse-class-body (scaner pset name supers)
+(export 'class-item)
+
+(defun parse-class-body (scanner pset name supers)
;; class-body ::= `{' class-item* `}'
+ ;;
+ ;; class-item ::= property-set raw-class-item
(with-parser-context (token-scanner-context :scanner scanner)
(make-class-type name)
- (let* ((class (make-sod-class name (mapcat #'find-sod-class supers)
+ (let* ((class (make-sod-class name (mapcar #'find-sod-class supers)
pset scanner))
(nick (sod-class-nickname class)))
;; names.
(parse-declarator
scanner base-type
- :centre (parser ()
+ :kernel (parser ()
(seq ((name-a :id)
(name-b (? (seq (#\. (id :id)) id))))
(if name-b (cons name-a name-b)
name-a)))))
- ;; class-item ::= [property-set] raw-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 nil 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 ::=
(when init
(make-sod-instance-initializer
class nick name (car init) (cdr init)
- nil scanner)))
+ sub-pset scanner)))
(skip-many ()
(seq (#\,
(ds (parse-declarator scanner
(make-sod-instance-initializer
class nick (cdr ds)
(car init) (cdr init)
- nil scanner))))
+ sub-pset scanner))))
#\;)))
(parse-initializer-item (sub-pset constructor)
;; Most of the above begin with declspecs and a declarator
;; (which might be dotted). So we parse that here and
;; dispatch based on what we find.
- (parse (or (peek
+ (parse (or (plug class-item scanner class sub-pset)
+ (peek
(seq ((ds (parse-c-type scanner))
(dc (parse-maybe-dotted-declarator ds))
- (result (class-item-dispatch sub-pset
- ds
- (car dc)
- (cdr dc))))
- result))
+ (nil (class-item-dispatch sub-pset
+ ds
+ (car dc)
+ (cdr dc))))))
(and "class"
(parse-initializer-item
sub-pset
sub-pset
#'make-sod-instance-initializer)))))
- (parse (and #\{
- (skip-many ()
- (seq ((sub-pset (? (parse-property-set)))
- (nil (parse-raw-class-item sub-pset)))))
- #\}))))))
+ (parse (seq (#\{
+ (nil (skip-many ()
+ (seq ((sub-pset (parse-property-set scanner))
+ (nil (parse-raw-class-item sub-pset)))
+ (check-unused-properties sub-pset))))
+ (nil (error () #\})))
+ (finalize-sod-class class)
+ (add-to-module *module* class)))))))
-(define-pluggable-parser module class (scanner)
+(define-pluggable-parser module class (scanner pset)
;; `class' id [`:' id-list] class-body
;; `class' id `;'
-
(with-parser-context (token-scanner-context :scanner scanner)
(parse (seq ("class"
(name :id)
scanner
pset name supers)))))))))))
-
-
-
- (parse (seq ("class"
- (name :id)
- (supers (? (seq (#\: (supers (list (:min 1) :id #\,)))
- supers)))
- #\{
-
-
;;;----- That's all, folks --------------------------------------------------
~mdw / sod / blobdiff