pouriya / pipeline Goto Github PK

Hi Pouriya,

Looking at oltarasenko/epipe there is an interesting way to implement railway oriented programming (https://fsharpforfunandprofit.com/rop/), namely to have 3 versions of a function like this:

myfunc(arg1, arg2) -> body.
and then adding 2 versions:
myfunc({ok, {arg1, arg2}}) -> myfunc(arg1, arg2);
and
myfunc({error, _} = ErrArg) -> ErrArg;

So that if you do myfunc(arg1, arg2) |> myfunc2(arg1, arg2) |> myfync3(arg) you would get either the output of the last function or the error message from the function that failed.

Would it be possible to implement the code to create those 2 function headers in the parse transform?

In a few places in the source :)

Erlang already has that operator in order to subtract elements in a list

1> [1, 2, 3] -- [1].
[2,3]