Geany: Syntax highlighting for #define

Question

#define ll long long

Sometimes Geany syntax highlight ll automatically for me and sometimes it just didn't work at all. I tried close and reopen several times and sometimes it works, sometimes it doesn't.

Can anybody tell me the reason for this weird behavior?

Note: I'm using Mac 10.11.6 and Geany 1.36 (if it helps).

Answer 1

You should use typedef for defining types.

The syntax using ll = long long; is more modern.

For a simple type definition it does exactly the same as typedef long long ll;

Answer 2

To answer your question: Geany determines the filetype based on two things: the extension name and the shebang. E.g. if you call your file foo.c it's recognized as a C-file. baa.cpp will be handled as C++.