bind getByteWidth to the vector type

trxcllnt · trxcllnt · commit 2ef150f7ed36 · 2019-01-13T03:16:37.000-08:00
diff --git a/js/src/vector/index.ts b/js/src/vector/index.ts
@@ -134,7 +134,7 @@ BaseVector.prototype[Symbol.iterator] = function baseVectorSymbolIterator<T exte
             VectorCtor.prototype['set'] = partial2(setVisitor.getVisitFn(typeId));
             VectorCtor.prototype['indexOf'] = partial2(indexOfVisitor.getVisitFn(typeId));
             VectorCtor.prototype['toArray'] = partial0(toArrayVisitor.getVisitFn(typeId));
-            VectorCtor.prototype['getByteWidth'] = partial0(byteWidthVisitor.getVisitFn(typeId));
+            VectorCtor.prototype['getByteWidth'] = partialType0(byteWidthVisitor.getVisitFn(typeId));
             VectorCtor.prototype[Symbol.iterator] = partial0(iteratorVisitor.getVisitFn(typeId));
         });
     });
@@ -144,6 +144,11 @@ function partial0<T>(visit: (node: T) => any) {
     return function(this: T) { return visit(this); };
 }
 
+/** @ignore */
+function partialType0<T extends Vector>(visit: (node: T['type']) => any) {
+    return function(this: T) { return visit(this.type); };
+}
+
 /** @ignore */
 function partial1<T>(visit: (node: T, a: any) => any) {
     return function(this: T, a: any) { return visit(this, a); };
