rename: mask -> fillSubOp, add: maskOp

Author: IgorErin

src/GraphBLAS-sharp.Backend/Common/StandardOperations.fs

@@ -124,8 +124,14 @@ module StandardOperations =
             | Some _ -> (%op) leftItem None
             | None -> (%op) leftItem (Some value) @>
 
-    let mask<'a when 'a: struct> =
+    let fillSubOp<'a when 'a: struct> =
         <@ fun (left: 'a option) (right: 'a option) ->
             match left, right with
             | _, None -> left
             | _ -> right @>
+
+    let maskOp<'a, 'b when 'a: struct and 'b: struct> =
+        <@ fun (left: 'a option) (right: 'b option) ->
+            match left, right with
+            | _, Some _ -> left
+            | _ -> None @>

src/GraphBLAS-sharp.Backend/Vector/Vector.fs

@@ -188,10 +188,10 @@ module Vector =
                 <| denseFillVector processor vector mask value
 
     let standardFillSubVector<'a, 'b when 'a: struct and 'b: struct> =
-        fillSubVector<'a, 'b> StandardOperations.mask<'a>
+        fillSubVector<'a, 'b> StandardOperations.fillSubOp<'a>
 
     let standardFillSubVectorComplemented<'a, 'b when 'a: struct and 'b: struct> =
-        fillSubVectorComplemented<'a, 'b> StandardOperations.mask<'a>
+        fillSubVectorComplemented<'a, 'b> StandardOperations.fillSubOp<'a>
 
     let reduce (clContext: ClContext) (workGroupSize: int) (opAdd: Expr<'a -> 'a -> 'a>) =
         let sparseReduce =