Debug.Dump

d, dd, and dump are aliases of the same QuasiQuoter. you can choose to imort just one of them:

import Debug.Dump (dd)

Example usage:

{-# LANGUAGE QuasiQuotes #-}

import Debug.Dump

main = print [d|a, a+1, map (+a) [1..3]|]
  where a = 2

which prints:

(a) = 2   (a+1) = 3       (map (+a) [1..3]) = [3,4,5]

by turnint this String

"a, a+1, map (+a) [1..3]"

into this expression

( "(a) = " ++ show (a)            ++ "t  " ++
  "(a+1) = " ++ show (a + 1)      ++ "t  " ++
  "(map (+a) [1..3]) = " ++ show (map (+ a) [1 .. 3])
)

Documentation

d :: QuasiQuoter

Shorthand for dump.

dd :: QuasiQuoter

Shorthand for dump.

dump :: QuasiQuoter

This is the main QuasiQuoter.