I think, you may get oddly looking code with such ligature fonts if you declare your own operators that contain ligatured pieces as parts. For exmaple the oper

I think, you may get oddly looking code with such ligature fonts if you declare your own operators that contain ligatured pieces as parts. For exmaple the operator >>== will probably have the first three characters joined in the ligature {>==}= Operators ==== and (four asterisks) may look very strange too.