enforce single use of HID submodule

Martino Facchin · Martino Facchin · commit 18a2f2a1cdc5 · 2015-06-23T17:28:31.000Z
diff --git a/libraries/Keyboard/Keyboard.h b/libraries/Keyboard/Keyboard.h
@@ -1,4 +1,10 @@
-#if 1
+#if defined(_USING_HID)
+
+#error "Can only attach one submodule to HID module"
+
+#else
+
+#define _USING_HID
 
 #include "HID.h"
 
diff --git a/libraries/Mouse/Mouse.h b/libraries/Mouse/Mouse.h
@@ -1,7 +1,13 @@
 #ifndef MOUSE_h
 #define MOUSE_h
 
-#if 1 //defined(USBCON)
+#if defined(_USING_HID)
+
+#error "Can only attach one submodule to HID module"
+
+#else
+
+#define _USING_HID
 
 #include "HID.h"
 //================================================================================
diff --git a/libraries/MouseAndKeyboard/MouseAndKeyboard.h b/libraries/MouseAndKeyboard/MouseAndKeyboard.h
@@ -1,6 +1,12 @@
 #ifndef MOUSEANDKEYBOARD_h
 
-#if 1 //defined(USBCON)
+#if defined(_USING_HID)
+
+#error "Can only attach one submodule to HID module"
+
+#else
+
+#define _USING_HID
 
 #include "HID.h"
 //================================================================================
