swap function

#223
not tested yet

Author: neu-rah

examples/esp8266/WebMenu/platformio.ini

@@ -39,7 +39,7 @@ build_flags =
   -DMENU_ASYNC
   -DMENU_FMT_WRAPS
   -DMENU_IDLE_BKGND
-  -DNO_MENU_DEBUG
-  -DNO_WEB_DEBUG
+  -DMENU_DEBUG
+  -DWEB_DEBUG
   -DMENU_SSID="\"r-site.net\"" -DMENU_PASS="\"rsite.2011\""
 src_build_flags = !echo "-Wno-write-strings -Wno-reorder -Wno-strict-aliasing -Wno-sign-compare -DLOC="$PLATFORMIO_LOC

library.properties

@@ -1,5 +1,5 @@
 name=ArduinoMenu library
-version=4.15.2
+version=4.15.3
 author=Rui Azevedo, [email protected]
 maintainer=neu-rah, [email protected]
 sentence=Generic menu/interactivity system

src/items.h

@@ -246,6 +246,14 @@
         void clearChanged(const navNode &nav,const menuOut& out,bool sub) override;
         inline idx_t sz() const {return ((menuNodeShadow*)shadow)->_sz();}
         inline prompt* constMEM* data() const {return ((menuNodeShadow*)shadow)->_data();}
+        #ifdef MENU_USERAM
+          void swap(idx_t a,idx_t b) {
+            auto ops=((menuNodeShadow*)shadow)->_data();
+            auto tmp=ops[a];
+            ops[a]=ops[b];
+            ops[b]=tmp;
+          }
+        #endif
         // #ifdef MENU_ASYNC
         //   prompt* seek(idx_t* uri,idx_t len) override;
         // #endif