add preliminay 'show' function

src/lang/executor.test.ts

@@ -59,8 +59,9 @@ log(5, myVar)`;
   path rightPath = lineTo(1,0)
   close()
 }
+show(mySketch)
 `;
-    const { root } = exe(code);
+    const { root, return: _return } = exe(code);
     expect(root.mySketch.map(({ previousPath, ...rest }: any) => rest)).toEqual(
       [
         { type: "base", from: [0, 0] },
@@ -71,6 +72,15 @@ log(5, myVar)`;
       ]
     );
     expect(root.mySketch[0]).toEqual(root.mySketch[4].firstPath);
+    // hmm not sure what handle the "show" function
+    expect(_return).toEqual([
+      {
+        type: "Identifier",
+        start: 108,
+        end: 116,
+        name: "mySketch",
+      },
+    ]);
   });
 });
 

src/lang/executor.ts

@@ -10,7 +10,7 @@ export interface ProgramMemory {
 export const executor = (
   node: Program,
   programMemory: ProgramMemory = { root: {}, _sketch: [] },
-  options: { bodyType: "default" | "sketch" } = { bodyType: "default" }
+  options: { bodyType: "root" | "sketch" | "block" } = { bodyType: "root" }
 ): any => {
   const _programMemory: ProgramMemory = {
     root: {
@@ -65,7 +65,7 @@ export const executor = (
             fnInit.params.forEach((param, index) => {
               fnMemory.root[param.name] = args[index];
             });
-            return executor(fnInit.body, fnMemory).return;
+            return executor(fnInit.body, fnMemory, {bodyType: 'block'}).return;
           };
         } else if (declaration.init.type === "CallExpression") {
           const fnName = declaration.init.callee.name;
@@ -115,6 +115,14 @@ export const executor = (
           }
           const result = sketchFns[functionName](_programMemory, "", ...args);
           _programMemory._sketch = [...result.programMemory._sketch];
+        } else if("show" === functionName) {
+          if (options.bodyType !== "root") {
+            throw new Error(
+              `Cannot call ${functionName} outside of a root`
+            );
+          }
+          _programMemory.return = expression.arguments;
+
         } else {
           _programMemory.root[functionName](...args);
         }