Merge pull request #20 from Microsoft/addSupportForInterfaceCtors

Add support for constructors in added interface json file

Author: zhengbli

TS.fsx

@@ -545,13 +545,20 @@ let EmitAddedInterface (ai: JsonItems.ItemsType.Root) =
     match ai.Extends with 
     | Some e -> Pt.printl "interface %s extends %s {" ai.Name.Value ai.Extends.Value
     | None -> Pt.printl "interface %s {" ai.Name.Value
-    
+
     ai.Properties |> Array.iter (fun p -> Pt.printWithAddedIndent "%s: %s;" p.Name p.Type)
     ai.Methods |> Array.collect (fun m -> m.Signatures) |> Array.iter (Pt.printWithAddedIndent "%s;")
     ai.Indexer |> Array.collect (fun i -> i.Signatures) |> Array.iter (Pt.printWithAddedIndent "%s;")
     Pt.printl "}"
     Pt.printl ""
 
+    if ai.ConstructorSignatures.Length > 0 then
+        Pt.printl "declare var %s: {" ai.Name.Value
+        Pt.printWithAddedIndent "prototype: %s;" ai.Name.Value
+        ai.ConstructorSignatures |> Array.iter (Pt.printWithAddedIndent "%s;")
+        Pt.printl "}"
+        Pt.printl "" 
+
 let EmitTheWholeThing flavor (target:TextWriter) =
     Pt.reset()
     Pt.printl "/////////////////////////////"

inputfiles/sample.json

@@ -53,6 +53,9 @@
     {
         "kind": "interface",
         "name": "BlobPropertyBag",
+        "constructorSignatures": [
+            "new(): NodeList"
+        ],
         "properties": [
             {
                 "name": "type?",