X-Git-Url: https://git.distorted.org.uk/~mdw/sod/blobdiff_plain/3109662aca9c06495ac22c5c58b46e1c036aca5c..1f7d590d9c7b87442c8d8b6424ed4f769d377692:/src/c-types-impl.lisp

diff --git a/src/c-types-impl.lisp b/src/c-types-impl.lisp
index 7dd7b84..4a0f6e2 100644
--- a/src/c-types-impl.lisp
+++ b/src/c-types-impl.lisp
@@ -428,7 +428,14 @@
 (export 'make-function-type)
 (defun make-function-type (subtype arguments)
   "Return a new function type, returning SUBTYPE and accepting ARGUMENTS."
-  (make-instance 'c-function-type :subtype subtype :arguments arguments))
+  (make-instance 'c-function-type :subtype subtype
+		 :arguments (if (and arguments
+				     (null (cdr arguments))
+				     (not (eq (car arguments) :ellipsis))
+				     (eq (argument-type (car arguments))
+					 c-type-void))
+				nil
+				arguments)))
 
 ;; Comparison protocol.
 
@@ -440,25 +447,27 @@
 
 ;; C syntax output protocol.
 
-(defmethod pprint-c-type ((type c-function-type) stream kernel)
-  (pprint-c-type (c-type-subtype type) stream
-		 (lambda (stream prio spacep)
-		   (maybe-in-parens (stream (> prio 2))
-		     (when spacep (c-type-space stream))
-		     (funcall kernel stream 2 nil)
-		     (pprint-indent :block 4 stream)
-		     (pprint-logical-block
-			 (stream nil :prefix "(" :suffix ")")
-		       (let ((firstp t))
-			 (dolist (arg (c-function-arguments type))
-			   (if firstp
-			       (setf firstp nil)
-			       (format stream ", ~_"))
-			   (if (eq arg :ellipsis)
-			       (write-string "..." stream)
-			       (pprint-c-type (argument-type arg)
-					      stream
-					      (argument-name arg))))))))))
+(let ((void-arglist (list (make-argument nil c-type-void))))
+  (defmethod pprint-c-type ((type c-function-type) stream kernel)
+    (pprint-c-type (c-type-subtype type) stream
+		   (lambda (stream prio spacep)
+		     (maybe-in-parens (stream (> prio 2))
+		       (when spacep (c-type-space stream))
+		       (funcall kernel stream 2 nil)
+		       (pprint-indent :block 4 stream)
+		       (pprint-logical-block
+			   (stream nil :prefix "(" :suffix ")")
+			 (let ((firstp t))
+			   (dolist (arg (or (c-function-arguments type)
+					    void-arglist))
+			     (if firstp
+				 (setf firstp nil)
+				 (format stream ", ~_"))
+			     (if (eq arg :ellipsis)
+				 (write-string "..." stream)
+				 (pprint-c-type (argument-type arg)
+						stream
+						(argument-name arg)))))))))))
 
 ;; S-expression notation protocol.
 
@@ -476,7 +485,7 @@
 			(list (argument-name arg) (argument-type arg))))
 		  (c-function-arguments type))))
 
-(export '(fun function func fn))
+(export '(fun function () func fn))
 (define-c-type-syntax fun (ret &rest args)
   "Return the type of functions which returns RET and has arguments ARGS.