tabs_and_spaces.cpp

// Play with ?ts=<N> in the URL to see the effects of tabs vs spaces.

#define $ /* this macro is purposely blank as a countermeasure to editors that don't support mixed leading tabs/spaces */

switch( v ) {
	case A, B:
	$    C, D:
		// ... code ...
}


// The `$` is unnecessary

switch( v ) {
	case A, B:
	     C, D:
		// ... code ...
}