Is there a wrapper with middle along with left and right?

[nank1ro]

The function

wrapper<L, R>(
    Parser<L> left,
    Parser<R> right,
    ..
)

can have a parser on the left and one on the right, using a loopback in the middle.
Is there a way to have a middle too?

For example I want to parse a string like this:

if a > b then x else y

With the if being the left, the then being the middle and the else being the right.
I already know about sequence parser but this is not the case I can use it (I think) because I already have parsers for all the text behind.

is there a way to achieve this using a wrapper of an ExpressionBuilder?
Is it possible to extend wrapper to have more than just left and right?

EDIT: now that I wrote it makes no sense, because else is not at the end

[nank1ro]

I'm just thinking that wrapping the whole ExpressionBuilder Parser into another Parser can work, so I can simply use a sequence and achieve the result I want