Cancel Objects - As seen at ERRF2019 (#15590)

Marlin/src/gcode/parser.cpp

@@ -138,7 +138,9 @@ void GCodeParser::parse(char *p) {
   switch (letter) {
 
     case 'G': case 'M': case 'T':
-
+    #if ENABLED(CANCEL_OBJECTS)
+      case 'O':
+    #endif
       // Skip spaces to get the numeric part
       while (*p == ' ') p++;
 
@@ -230,7 +232,14 @@ void GCodeParser::parse(char *p) {
     case 23: case 28: case 30: case 117: case 118: case 928: string_arg = p; return;
     default: break;
   }
-
+/*
+  #if ENABLED(CANCEL_OBJECTS)
+  if (letter == 'O') switch (codenum) {
+    case 1:  string_arg = p; return;
+    default: break;
+  }
+  #endif
+*/
   #if ENABLED(DEBUG_GCODE_PARSER)
     const bool debug = codenum == 800;
   #endif