X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/sod/blobdiff_plain/a42893dda5f4dd2b89fbfe4e497da261159225ca..ffc2a7b8364cc459ff686cfce645079b52d11466:/src/module-parse.lisp

diff --git a/src/module-parse.lisp b/src/module-parse.lisp
index f6d69ee..da1c47f 100644
--- a/src/module-parse.lisp
+++ b/src/module-parse.lisp
@@ -101,17 +101,21 @@ (defun read-module (pathname &key (truename nil truep) location)
   (define-module (pathname :location location :truename truename)
     (with-open-file (f-stream pathname :direction :input)
       (let* ((*readtable* (copy-readtable))
+	     (*package* (find-package '#:sod-user))
 	     (char-scanner (make-instance 'charbuf-scanner
 					  :stream f-stream))
 	     (scanner (make-instance 'sod-token-scanner
 				     :char-scanner char-scanner)))
 	(with-default-error-location (scanner)
 	  (with-parser-context (token-scanner-context :scanner scanner)
-	    (parse (skip-many ()
-		     (seq ((pset (parse-property-set scanner))
-			   (nil (error ()
-				  (plug module scanner pset))))
-		       (check-unused-properties pset))))))))))
+	    (multiple-value-bind (result winp consumedp)
+		(parse (skip-many ()
+			  (seq ((pset (parse-property-set scanner))
+				(nil (error ()
+				       (plug module scanner pset))))
+			    (check-unused-properties pset))))
+	      (declare (ignore consumedp))
+	      (unless winp (syntax-error scanner result)))))))))
 
 (define-pluggable-parser module test (scanner pset)
   ;; `demo' string `;'
@@ -208,6 +212,25 @@ (define-pluggable-parser class-item initfrags (scanner class pset)
 		 (frag (parse-delimited-fragment scanner #\{ #\})))
 	     (funcall make class frag pset scanner)))))
 
+(define-pluggable-parser class-item initargs (scanner class pset)
+  ;; initarg-item ::= `initarg' declspec+ init-declarator-list
+  ;; init-declarator ::= declarator [`=' initializer]
+  (with-parser-context (token-scanner-context :scanner scanner)
+    (parse (seq ("initarg"
+		 (base-type (parse-c-type scanner))
+		 (nil (skip-many (:min 1)
+			(seq ((declarator (parse-declarator scanner
+							    base-type))
+			      (init (? (parse-delimited-fragment
+					scanner #\= (list #\; #\,)
+					:keep-end t))))
+			  (make-sod-user-initarg class
+						 (cdr declarator)
+						 (car declarator)
+						 pset init scanner))
+			#\,))
+		   #\;)))))
+
 (defun parse-class-body (scanner pset name supers)
   ;; class-body ::= `{' class-item* `}'
   ;;
@@ -295,19 +318,22 @@ (defun parse-class-body (scanner pset name supers)
 				    sub-pset scanner))))
 			     #\;)))
 
-	       (parse-initializer-item (sub-pset constructor)
+	       (parse-initializer-item (sub-pset must-init-p constructor)
 		 ;; initializer-item ::=
 		 ;;	[`class'] -!- slot-initializer-list `;'
 		 ;;
-		 ;; slot-initializer ::= id `.' id initializer
-		 (parse (and (skip-many ()
-			       (seq ((name-a :id) #\. (name-b :id)
-				     (init (parse-initializer)))
-				 (funcall constructor class
-					  name-a name-b init
-					  sub-pset scanner))
-			       #\,)
-			     #\;)))
+		 ;; slot-initializer ::= id `.' id [initializer]
+		 (let ((parse-init (if must-init-p
+				       #'parse-initializer
+				       (parser () (? (parse-initializer))))))
+		   (parse (and (skip-many ()
+				 (seq ((name-a :id) #\. (name-b :id)
+				       (init (funcall parse-init)))
+				   (funcall constructor class
+					    name-a name-b init
+					    sub-pset scanner))
+				 #\,)
+			       #\;))))
 
 	       (class-item-dispatch (sub-pset base-type type name)
 		 ;; Logically part of `parse-raw-class-item', but the
@@ -347,16 +373,17 @@ (defun parse-class-body (scanner pset name supers)
 			    (peek
 			     (seq ((ds (parse-c-type scanner))
 				   (dc (parse-maybe-dotted-declarator ds))
+				   (nil (commit))
 				   (nil (class-item-dispatch sub-pset
 							     ds
 							     (car dc)
 							     (cdr dc))))))
 			    (and "class"
 				 (parse-initializer-item
-				  sub-pset
+				  sub-pset t
 				  #'make-sod-class-initializer))
 			    (parse-initializer-item
-			     sub-pset
+			     sub-pset nil
 			     #'make-sod-instance-initializer)))))
 
 	(parse (seq (#\{
@@ -369,15 +396,15 @@ (defun parse-class-body (scanner pset name supers)
 		 (add-to-module *module* class)))))))
 
 (define-pluggable-parser module class (scanner pset)
-  ;; `class' id [`:' id-list] class-body
+  ;; `class' id `:' id-list class-body
   ;; `class' id `;'
   (with-parser-context (token-scanner-context :scanner scanner)
     (parse (seq ("class"
 		 (name :id)
 		 (nil (or (seq (#\;)
 			    (make-class-type name))
-			  (seq ((supers (? (seq (#\: (ids (list () :id #\,)))
-					     ids)))
+			  (seq ((supers (seq (#\: (ids (list () :id #\,)))
+					  ids))
 				(nil (parse-class-body
 				      scanner
 				      pset name supers)))))))))))