This is kind of neat to get named arguments in C as well.

Instead of calling:

    foo_init(1, 'a', 1.0);

You can write:

    foo_init(.arg1=1, .arg3=1.0, .arg2='a');
    foo_init(.arg3='c');
    // etc

edit: didn't see this in the blog comments, wasn't trying to steal credit ;-P