X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/sod/blobdiff_plain/ea4843d5bc48fb15f209a6ccd32db4b4ffab0eb7..311141120e0fe0196f05861285d71472c5e91e02:/src/module-parse.lisp

diff --git a/src/module-parse.lisp b/src/module-parse.lisp
index 142992e..fb60b49 100644
--- a/src/module-parse.lisp
+++ b/src/module-parse.lisp
@@ -132,7 +132,7 @@ (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) #\;)
+    (parse (seq ("demo" (string (must :string)) (nil (must #\;)))
 	     (format t ";; DEMO ~S~%" string)))))
 
 (define-pluggable-parser module file (scanner pset)
@@ -140,14 +140,15 @@ (define-pluggable-parser module file (scanner pset)
   ;; `load' string `;'
   (declare (ignore pset))
   (flet ((common (name type what thunk)
-	   (find-file scanner
-		      (merge-pathnames name
-				       (make-pathname :type type
-						      :case :common))
-		      what
-		      thunk)))
+	   (when name
+	     (find-file scanner
+			(merge-pathnames name
+					 (make-pathname :type type
+							:case :common))
+			what
+			thunk))))
     (with-parser-context (token-scanner-context :scanner scanner)
-      (parse (or (seq ("import" (name :string) #\;)
+      (parse (or (seq ("import" (name (must :string)) (nil (must #\;)))
 		   (common name "SOD" "module"
 			   (lambda (path true)
 			     (handler-case
@@ -160,8 +161,12 @@ (define-pluggable-parser module file (scanner pset)
 					       *module*))))
 			       (file-error (error)
 				 (cerror* "Error reading module ~S: ~A"
+					  path error))
+			       (error (error)
+				 (cerror* "Unexpected error reading ~
+					   module ~S: ~A"
 					  path error))))))
-		 (seq ("load" (name :string) #\;)
+		 (seq ("load" (name (must :string)) (nil (must #\;)))
 		   (common name "LISP" "Lisp file"
 			   (lambda (path true)
 			     (handler-case
@@ -206,7 +211,7 @@ (define-pluggable-parser module lisp (scanner pset)
 			     (scanner-step scanner)
 			     (values sexp t t))
 			   (values '((:id "lisp")) nil nil)))
-		 #\;)
+		 (nil (must #\;)))
 	     (eval sexp)))))
 
 ;;;--------------------------------------------------------------------------
@@ -240,41 +245,55 @@ (define-pluggable-parser class-item initargs (scanner class pset)
 						 (car declarator)
 						 pset init scanner))
 			#\,))
-		   #\;)))))
+		 (nil (must #\;)))))))
+
+(defun synthetic-name ()
+  "Return an obviously bogus synthetic not-identifier."
+  (let ((ix *temporary-index*))
+    (incf *temporary-index*)
+    (make-instance 'temporary-variable :tag (format nil "%%#~A" ix))))
 
 (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* ((duff nil)
-	   (class (make-sod-class name
+    (when name (make-class-type name))
+    (let* ((duff (null name))
+	   (synthetic-name (or name
+			       (let ((var (synthetic-name)))
+				 (unless pset
+				   (setf pset (make-property-set)))
+				 (unless (pset-get pset "nick")
+				   (add-property pset "nick" var :type :id))
+				 var)))
+	   (class (make-sod-class synthetic-name
 				  (restart-case
-				      (mapcar #'find-sod-class supers)
+				      (mapcar #'find-sod-class
+					      (or supers (list "SodObject")))
 				    (continue ()
 				      (setf duff t)
 				      (list (find-sod-class "SodObject"))))
 				  pset scanner))
 	   (nick (sod-class-nickname class)))
 
-      (labels ((parse-maybe-dotted-declarator (base-type)
-		 ;; Parse a declarator or dotted-declarator, i.e., one whose
-		 ;; centre is
-		 ;;
-		 ;; maybe-dotted-identifier ::= [id `.'] id
+      (labels ((parse-maybe-dotted-name ()
+		 ;; maybe-dotted-name ::= [id `.'] id
 		 ;;
 		 ;; A plain identifier is returned as a string, as usual; a
 		 ;; dotted identifier is returned as a cons cell of the two
 		 ;; names.
-		 (parse-declarator
-		  scanner base-type
-		  :keywordp t
-		  :kernel (parser ()
-			    (seq ((name-a :id)
-				  (name-b (? (seq (#\. (id :id)) id))))
-			      (if name-b (cons name-a name-b)
-				  name-a)))))
+		 (parse (seq ((name-a :id)
+			      (name-b (? (seq (#\. (id :id)) id))))
+			  (if name-b (cons name-a name-b)
+			      name-a))))
+
+	       (parse-maybe-dotted-declarator (base-type)
+		 ;; Parse a declarator or dotted-declarator, i.e., one whose
+		 ;; centre is maybe-dotted-name above.
+		 (parse-declarator scanner base-type
+				   :keywordp t
+				   :kernel #'parse-maybe-dotted-name))
 
 	       (parse-message-item (sub-pset type name)
 		 ;; message-item ::=
@@ -298,15 +317,17 @@ (defun parse-class-body (scanner pset name supers)
 		 (parse (seq ((body (or (seq ("extern" #\;) nil)
 					(parse-delimited-fragment
 					 scanner #\{ #\}))))
-			  (make-sod-method class sub-nick name type
-					   body sub-pset scanner))))
+			  (restart-case
+			      (make-sod-method class sub-nick name type
+					       body sub-pset scanner)
+			    (continue () :report "Continue")))))
 
 	       (parse-initializer ()
 		 ;; initializer ::= `=' c-fragment
 		 ;;
 		 ;; Return a VALUE, ready for passing to a `sod-initializer'
 		 ;; constructor.
-		 (parse-delimited-fragment scanner #\= (list #\, #\;)
+		 (parse-delimited-fragment scanner #\= '(#\, #\;)
 					   :keep-end t))
 
 	       (parse-slot-item (sub-pset base-type type name)
@@ -315,24 +336,27 @@ (defun parse-class-body (scanner pset name supers)
 		 ;;		[`,' list[init-declarator]] `;'
 		 ;;
 		 ;; init-declarator ::=	declarator [initializer]
-		 (parse (and (seq ((init (? (parse-initializer))))
-			       (make-sod-slot class name type
-					      sub-pset scanner)
-			       (when init
-				 (make-sod-instance-initializer
-				  class nick name init sub-pset scanner)))
-			     (skip-many ()
-			       (seq (#\,
-				     (ds (parse-declarator scanner
-							   base-type))
-				     (init (? (parse-initializer))))
-				 (make-sod-slot class (cdr ds) (car ds)
-						sub-pset scanner)
-				 (when init
-				   (make-sod-instance-initializer
-				    class nick (cdr ds) init
-				    sub-pset scanner))))
-			     #\;)))
+		 (flet ((make-it (name type init)
+			  (restart-case
+			      (progn
+				(make-sod-slot class name type
+					       sub-pset scanner)
+				(when init
+				  (make-sod-instance-initializer class
+								 nick name
+								 init
+								 sub-pset
+								 scanner)))
+			    (continue () :report "Continue"))))
+		   (parse (and (seq ((init (? (parse-initializer))))
+				 (make-it name type init))
+			       (skip-many ()
+				 (seq (#\,
+				       (ds (parse-declarator scanner
+							     base-type))
+				       (init (? (parse-initializer))))
+				   (make-it (cdr ds) (car ds) init)))
+			       #\;))))
 
 	       (parse-initializer-item (sub-pset must-init-p constructor)
 		 ;; initializer-item ::=
@@ -344,9 +368,11 @@ (defun parse-class-body (scanner pset name supers)
 		   (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))
+				   (restart-case
+				       (funcall constructor class
+						name-a name-b init
+						sub-pset scanner)
+				     (continue () :report "Continue")))
 				 #\,)
 			       #\;))))
 
@@ -414,11 +440,12 @@ (define-pluggable-parser module class (scanner pset)
   ;; `class' id `;'
   (with-parser-context (token-scanner-context :scanner scanner)
     (parse (seq ("class"
-		 (name :id)
+		 (name (must :id))
 		 (nil (or (seq (#\;)
-			    (make-class-type name))
-			  (seq ((supers (seq (#\: (ids (list () :id #\,)))
-					  ids))
+			    (when name (make-class-type name)))
+			  (seq ((supers (must (seq (#\:
+						    (ids (list () :id #\,)))
+						ids)))
 				(nil (parse-class-body
 				      scanner
 				      pset name supers)))))))))))