--- a/sema/DType.d	Fri Jul 25 01:21:07 2008 +0200
+++ b/sema/DType.d	Fri Jul 25 01:39:01 2008 +0200
@@ -61,6 +61,11 @@
     /// Return a DFunction if this is one, otherwise return null
     DFunction asFunction() { return null; }
 
+    /// Is this type a DFunction or a pointer to one
+    bool isCallable() { return false; }
+    /// Return a DFunction if this one is available
+    DFunction asCallable() { return null; }
+
     /// Returns true for integers, reals and complex numbers
     bool isArithmetic() { return false; }
 
@@ -607,6 +612,8 @@
 
     override bool isPointer() { return true; }
     override DPointer asPointer() { return this; }
+    bool isCallable() { return pointerOf.isFunction(); }
+    DFunction asCallable() { return pointerOf.asFunction(); }
 
     int byteSize() { return DType.Int.byteSize; }
 
@@ -655,6 +662,8 @@
 
     override bool isFunction() { return true; }
     override DFunction asFunction() { return this; }
+    bool isCallable() { return true; }
+    DFunction asCallable() { return this; }
 
     override bool hasImplicitConversionTo(DType that)
     {