fix std_function

.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "(Windows) Attach",
+            "type": "cppvsdbg",
+            "request": "attach",
+            "processId": "${command:pickProcess}",
+            "symbolSearchPath": "${workspaceFolder}/build/Debug;${workspaceFolder}/build/java_natvie",
+        }
+    ]
+}