[ANN] ppxlib - Jane Street ppx infrastructure now on github

[Kakadu]

Folks, Can you help me to implement a kind of optional arguments using ppxlib?

Semi optional deriving arguments using ppxlib

I’m trying to use ppxlib (actually, ppx_type_conv which now is a part of ppxlib) and my goal is to specify plugin arguments as I want. More precisely, ppxlib currently supports arguments like [@@deriving plugin_name ~flag1 ~flag2 ...] where presence of labeled argument translates to true and absence to false. Another way to declare arguments is to replace bool type by expression type, i.e. [@@deriving plugin_name ~arg1:e1 ~arg2:e2 ...] where the user obliged to specify expression for the label…