Create block-shape.js

src/extension-support/block-shape.js

@@ -0,0 +1,22 @@
+/**
+ * Types of block shapes
+ * @enum {number}
+ */
+const BlockShape = {
+    /**
+     * Output shape: hexagonal (booleans/predicates).
+     */
+    HEXAGONAL: 1,
+
+    /**
+     * Output shape: rounded (numbers).
+     */
+    ROUND: 2,
+
+    /**
+     * Output shape: squared (any/all values; strings).
+     */
+    SQUARE: 3,
+};
+
+module.exports = BlockShape;