Shorthand for __VA_ARGS__

Marlin/src/core/macros.h

 #endif
 
 // Use NUM_ARGS(__VA_ARGS__) to get the number of variadic arguments
-#define _NUM_ARGS(_0,_24_,_23,_22,_21,_20,_19,_18,_17,_16,_15,_14,_13,_12,_11,_10,_9,_8,_7,_6,_5,_4,_3,_2,_1,N,...) N
-#define NUM_ARGS(V...) _NUM_ARGS(0,V,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)
+#define _NUM_ARGS(_,Z,Y,X,W,V,U,T,S,R,Q,P,O,N,M,L,K,J,I,H,G,F,E,D,C,B,A,OUT,...) OUT
+#define NUM_ARGS(V...) _NUM_ARGS(0,V,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)
 
 #ifdef __cplusplus
 
 #else
 
   #define MIN_2(a,b)      ((a)<(b)?(a):(b))
-  #define MIN_3(a,...)    MIN_2(a,MIN_2(__VA_ARGS__))
-  #define MIN_4(a,...)    MIN_2(a,MIN_3(__VA_ARGS__))
-  #define MIN_5(a,...)    MIN_2(a,MIN_4(__VA_ARGS__))
-  #define MIN_6(a,...)    MIN_2(a,MIN_5(__VA_ARGS__))
-  #define MIN_7(a,...)    MIN_2(a,MIN_6(__VA_ARGS__))
-  #define MIN_8(a,...)    MIN_2(a,MIN_7(__VA_ARGS__))
-  #define MIN_9(a,...)    MIN_2(a,MIN_8(__VA_ARGS__))
-  #define MIN_10(a,...)   MIN_2(a,MIN_9(__VA_ARGS__))
-  #define __MIN_N(N, ...) MIN_##N(__VA_ARGS__)
-  #define _MIN_N(N, ...)  __MIN_N(N,__VA_ARGS__)
-  #define _MIN(...)       _MIN_N(NUM_ARGS(__VA_ARGS__), __VA_ARGS__)
+  #define MIN_3(a,V...)   MIN_2(a,MIN_2(V))
+  #define MIN_4(a,V...)   MIN_2(a,MIN_3(V))
+  #define MIN_5(a,V...)   MIN_2(a,MIN_4(V))
+  #define MIN_6(a,V...)   MIN_2(a,MIN_5(V))
+  #define MIN_7(a,V...)   MIN_2(a,MIN_6(V))
+  #define MIN_8(a,V...)   MIN_2(a,MIN_7(V))
+  #define MIN_9(a,V...)   MIN_2(a,MIN_8(V))
+  #define MIN_10(a,V...)  MIN_2(a,MIN_9(V))
+  #define __MIN_N(N,V...) MIN_##N(V)
+  #define _MIN_N(N,V...)  __MIN_N(N,V)
+  #define _MIN(V...)      _MIN_N(NUM_ARGS(V), V)
 
   #define MAX_2(a,b)      ((a)>(b)?(a):(b))
-  #define MAX_3(a,...)    MAX_2(a,MAX_2(__VA_ARGS__))
-  #define MAX_4(a,...)    MAX_2(a,MAX_3(__VA_ARGS__))
-  #define MAX_5(a,...)    MAX_2(a,MAX_4(__VA_ARGS__))
-  #define MAX_6(a,...)    MAX_2(a,MAX_5(__VA_ARGS__))
-  #define MAX_7(a,...)    MAX_2(a,MAX_6(__VA_ARGS__))
-  #define MAX_8(a,...)    MAX_2(a,MAX_7(__VA_ARGS__))
-  #define MAX_9(a,...)    MAX_2(a,MAX_8(__VA_ARGS__))
-  #define MAX_10(a,...)   MAX_2(a,MAX_9(__VA_ARGS__))
-  #define __MAX_N(N, ...) MAX_##N(__VA_ARGS__)
-  #define _MAX_N(N, ...)  __MAX_N(N,__VA_ARGS__)
-  #define _MAX(...)       _MAX_N(NUM_ARGS(__VA_ARGS__), __VA_ARGS__)
+  #define MAX_3(a,V...)   MAX_2(a,MAX_2(V))
+  #define MAX_4(a,V...)   MAX_2(a,MAX_3(V))
+  #define MAX_5(a,V...)   MAX_2(a,MAX_4(V))
+  #define MAX_6(a,V...)   MAX_2(a,MAX_5(V))
+  #define MAX_7(a,V...)   MAX_2(a,MAX_6(V))
+  #define MAX_8(a,V...)   MAX_2(a,MAX_7(V))
+  #define MAX_9(a,V...)   MAX_2(a,MAX_8(V))
+  #define MAX_10(a,V...)  MAX_2(a,MAX_9(V))
+  #define __MAX_N(N,V...) MAX_##N(V)
+  #define _MAX_N(N,V...)  __MAX_N(N,V)
+  #define _MAX(V...)      _MAX_N(NUM_ARGS(V), V)
 
 #endif

Marlin/src/core/utility.h

   inline void restore() { ref_ = val_; }
 };
 
-#define REMEMBER(N,X, ...) const restorer<typeof(X)> restorer_##N(X, ##__VA_ARGS__)
+#define REMEMBER(N,X,V...) const restorer<typeof(X)> restorer_##N(X, ##V)
 #define RESTORE(N) restorer_##N.restore()
 
 // Converts from an uint8_t in the range of 0-255 to an uint8_t

Marlin/src/inc/Conditionals_post.h

 /**
  * ARRAY_BY_EXTRUDERS based on EXTRUDERS
  */
-#define ARRAY_BY_EXTRUDERS(...) ARRAY_N(EXTRUDERS, __VA_ARGS__)
+#define ARRAY_BY_EXTRUDERS(V...) ARRAY_N(EXTRUDERS, V)
 #define ARRAY_BY_EXTRUDERS1(v1) ARRAY_BY_EXTRUDERS(v1, v1, v1, v1, v1, v1)
 
 /**
  * ARRAY_BY_HOTENDS based on HOTENDS
  */
-#define ARRAY_BY_HOTENDS(...) ARRAY_N(HOTENDS, __VA_ARGS__)
+#define ARRAY_BY_HOTENDS(V...) ARRAY_N(HOTENDS, V)
 #define ARRAY_BY_HOTENDS1(v1) ARRAY_BY_HOTENDS(v1, v1, v1, v1, v1, v1)
 
 /**

Marlin/src/lcd/menu/menu.h

  *     MenuItem_int3::action_edit(PSTR(MSG_SPEED), &feedrate_percentage, 10, 999)
  *
  */
-#define _MENU_ITEM_VARIANT_P(TYPE, VARIANT, USE_MULTIPLIER, PLABEL, ...) do { \
+#define _MENU_ITEM_VARIANT_P(TYPE, VARIANT, USE_MULTIPLIER, PLABEL, V...) do { \
     _skipStatic = false; \
     if (_menuLineNr == _thisItemNr) { \
       if (encoderLine == _thisItemNr && ui.use_click()) { \
         _MENU_ITEM_MULTIPLIER_CHECK(USE_MULTIPLIER); \
-        MenuItem_##TYPE ::action ## VARIANT(__VA_ARGS__); \
+        MenuItem_##TYPE ::action ## VARIANT(V); \
         if (screen_changed) return; \
       } \
       if (ui.should_draw()) \
-        draw_menu_item ## VARIANT ## _ ## TYPE(encoderLine == _thisItemNr, _lcdLineNr, PLABEL, ## __VA_ARGS__); \
+        draw_menu_item ## VARIANT ## _ ## TYPE(encoderLine == _thisItemNr, _lcdLineNr, PLABEL, ##V); \
     } \
   ++_thisItemNr; \
 }while(0)
 
 // Used to print static text with no visible cursor.
 // Parameters: label [, bool center [, bool invert [, char *value] ] ]
-#define STATIC_ITEM_P(PLABEL, ...) do{ \
+#define STATIC_ITEM_P(PLABEL, V...) do{ \
   if (_menuLineNr == _thisItemNr) { \
     if (_skipStatic && encoderLine <= _thisItemNr) { \
       ui.encoderPosition += ENCODER_STEPS_PER_MENU_ITEM; \
       ++encoderLine; \
     } \
     if (ui.should_draw()) \
-      draw_menu_item_static(_lcdLineNr, PLABEL, ## __VA_ARGS__); \
+      draw_menu_item_static(_lcdLineNr, PLABEL, ##V); \
   } \
   ++_thisItemNr; \
 } while(0)
 
 #define MENU_ITEM_ADDON_END() } }while(0)
 
-#define STATIC_ITEM(LABEL, ...) STATIC_ITEM_P(PSTR(LABEL), ## __VA_ARGS__)
+#define STATIC_ITEM(LABEL, V...) STATIC_ITEM_P(PSTR(LABEL), ##V)
 
 #define MENU_BACK(LABEL) MENU_ITEM(back, LABEL)
 #define MENU_ITEM_DUMMY() do { _thisItemNr++; }while(0)
-#define MENU_ITEM_P(TYPE, PLABEL, ...)                       _MENU_ITEM_VARIANT_P(TYPE,      , false, PLABEL,                   ## __VA_ARGS__)
-#define MENU_ITEM(TYPE, LABEL, ...)                          _MENU_ITEM_VARIANT_P(TYPE,      , false, PSTR(LABEL),              ## __VA_ARGS__)
-#define MENU_ITEM_EDIT(TYPE, LABEL, ...)                     _MENU_ITEM_VARIANT_P(TYPE, _edit, false, PSTR(LABEL), PSTR(LABEL), ## __VA_ARGS__)
-#define MENU_ITEM_EDIT_CALLBACK(TYPE, LABEL, ...)            _MENU_ITEM_VARIANT_P(TYPE, _edit, false, PSTR(LABEL), PSTR(LABEL), ## __VA_ARGS__)
-#define MENU_MULTIPLIER_ITEM_EDIT(TYPE, LABEL, ...)          _MENU_ITEM_VARIANT_P(TYPE, _edit,  true, PSTR(LABEL), PSTR(LABEL), ## __VA_ARGS__)
-#define MENU_MULTIPLIER_ITEM_EDIT_CALLBACK(TYPE, LABEL, ...) _MENU_ITEM_VARIANT_P(TYPE, _edit,  true, PSTR(LABEL), PSTR(LABEL), ## __VA_ARGS__)
+#define MENU_ITEM_P(TYPE, PLABEL, V...)                       _MENU_ITEM_VARIANT_P(TYPE,      , false, PLABEL,                   ##V)
+#define MENU_ITEM(TYPE, LABEL, V...)                          _MENU_ITEM_VARIANT_P(TYPE,      , false, PSTR(LABEL),              ##V)
+#define MENU_ITEM_EDIT(TYPE, LABEL, V...)                     _MENU_ITEM_VARIANT_P(TYPE, _edit, false, PSTR(LABEL), PSTR(LABEL), ##V)
+#define MENU_ITEM_EDIT_CALLBACK(TYPE, LABEL, V...)            _MENU_ITEM_VARIANT_P(TYPE, _edit, false, PSTR(LABEL), PSTR(LABEL), ##V)
+#define MENU_MULTIPLIER_ITEM_EDIT(TYPE, LABEL, V...)          _MENU_ITEM_VARIANT_P(TYPE, _edit,  true, PSTR(LABEL), PSTR(LABEL), ##V)
+#define MENU_MULTIPLIER_ITEM_EDIT_CALLBACK(TYPE, LABEL, V...) _MENU_ITEM_VARIANT_P(TYPE, _edit,  true, PSTR(LABEL), PSTR(LABEL), ##V)
 
 ////////////////////////////////////////////
 /////////////// Menu Screens ///////////////