This would be a very helpful feature when developing in C as #ifdef's and #endif's are usually scattered over many lines, thus making it hard to keep track of manually.

Example code for a use case:

#ifndef SOMETHING

// code...

#ifdef ANOTHER_THING

// foo

#else THIRD_CONDITION

// bar

#endif

doStuff(arguments);

#endif


Placing the mouse over the #ifndef should highlight the latter #endif in a similar way to how matching brackets are highlighted. Preferably, one should be able to double-click to be taken to that line if is not visible in the display. A mouse-over on #ifdef should highlight both the #else and the matching #endif, preferably also with an option to be taken there.

P.S. I'm a C/Python developer myself, so I might be able to patch up something if I can get some pointers as to what and where I need to change.