X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/sod/blobdiff_plain/a351d620c0162c2230f257f93f60beecfd7d05c2..31194ea55102b83b087232e7af8e1a47399eec02:/src/module-parse.lisp

diff --git a/src/module-parse.lisp b/src/module-parse.lisp
index fed98f8..eff4af7 100644
--- a/src/module-parse.lisp
+++ b/src/module-parse.lisp
@@ -52,6 +52,7 @@ (define-pluggable-parser module typename (scanner pset)
 
 (define-pluggable-parser module code (scanner pset)
   ;; `code' id `:' item-name [constraints] `{' c-fragment `}'
+  ;; `code' id `:' constraints `;'
   ;;
   ;; constraints ::= `[' list[constraint] `]'
   ;; constraint ::= item-name+
@@ -64,30 +65,37 @@ (define-pluggable-parser module code (scanner pset)
 	     (item ()
 	       (parse (or (kw)
 			  (seq (#\( (names (list (:min 1) (kw))) #\))
-			    names)))))
+			    names))))
+	     (constraints ()
+	       (parse (seq (#\[
+			    (constraints
+			     (list ()
+			       (list (:min 1)
+				 (error (:ignore-unconsumed t) (item)
+				   (skip-until () :id #\( #\, #\])))
+			       #\,))
+			    #\])
+			constraints)))
+	     (fragment ()
+	       (parse-delimited-fragment scanner #\{ #\})))
       (parse (seq ("code"
 		   (reason (must (kw)))
 		   (nil (must #\:))
-		   (name (must (item)))
-		   (constraints (? (seq (#\[
-					 (constraints
-					  (list ()
-					    (list (:min 1)
-					      (error (:ignore-unconsumed t)
-						  (item)
-						(skip-until ()
-						  :id #\( #\, #\])))
-					    #\,))
-					 #\])
-				     constraints)))
-		   (fragment (parse-delimited-fragment scanner #\{ #\})))
-	       (when name
-		 (add-to-module *module*
-				(make-instance 'code-fragment-item
-					       :fragment fragment
-					       :constraints constraints
-					       :reason reason
-					       :name name))))))))
+		   (item (or (seq ((constraints (constraints))
+				   (nil (must #\;)))
+			       (make-instance 'code-fragment-item
+					      :reason reason
+					      :constraints constraints))
+			     (seq ((name (must (item)))
+				   (constraints (? (constraints)))
+				   (fragment (fragment)))
+			       (and name
+				    (make-instance 'code-fragment-item
+						   :reason reason
+						   :constraints constraints
+						   :name name
+						   :fragment fragment))))))
+	       (when item (add-to-module *module* item)))))))
 
 ;;; External files.
 
@@ -208,6 +216,60 @@ (define-pluggable-parser module lisp (scanner pset)
 		 (nil (must #\;)))
 	     (eval sexp)))))
 
+;;;--------------------------------------------------------------------------
+;;; Static instances.
+
+(define-pluggable-parser module instance (scanner pset)
+  ;; `instance' id id list[slot-initializer] `;'
+  (with-parser-context (token-scanner-context :scanner scanner)
+    (let ((duff nil)
+	  (floc nil)
+	  (empty-pset (make-property-set)))
+      (parse (seq ("instance"
+		   (class (seq ((class-name (must :id)))
+			    (setf floc (file-location scanner))
+			    (restart-case (find-sod-class class-name)
+			      (continue ()
+				(setf duff t)
+				nil))))
+		   (name (must :id))
+		   (inits (? (seq (#\:
+				   (inits (list (:min 0)
+					    (seq ((nick (must :id))
+						  #\.
+						  (name (must :id))
+						  (value
+						   (parse-delimited-fragment
+						    scanner #\= '(#\, #\;)
+						    :keep-end t)))
+					      (make-sod-instance-initializer
+					       class nick name value
+					       empty-pset
+					       :add-to-class nil
+					       :location scanner))
+					    #\,)))
+			       inits)))
+		   #\;)
+	       (unless duff
+		 (acond ((find-if (lambda (item)
+				    (and (typep item 'static-instance)
+					 (string= (static-instance-name item)
+						  name)))
+				  (module-items *module*))
+			 (cerror*-with-location floc
+						"Instance with name `~A' ~
+						 already defined."
+						name)
+			 (info-with-location (file-location it)
+					     "Previous definition was ~
+					      here."))
+			(t
+			 (add-to-module *module*
+					(make-static-instance class name
+							      inits
+							      pset
+							      floc))))))))))
+
 ;;;--------------------------------------------------------------------------
 ;;; Class declarations.