turn off lazy evaluation in haskell

Question

Is it possible to turn off lazy evaluation in Haskell?

Is there a specific compiler flag of library to facilitate this?

I wanted to try something new with

Answer 1

The strict-identity package has a strict version of the Identity monad.

You can find it here: https://hackage.haskell.org/package/strict-identity

The usage would look something like this:

foo = runStrictIdentity $! do
    x <- f a b
    y <- g x y
    return $! x + y

Each time return or bind >>= is used, the two parts are evaluated using seq, giving a reasonable guarantee of strictness provided your data structure isn't too deep. This works, for i.e. numbers and basic structures.