basement-cd-0.0.12.1: Basement/Compat/CallStack.hs

{-# LANGUAGE CPP #-}
{-# LANGUAGE ImplicitParams #-}
{-# LANGUAGE ConstraintKinds #-}
module Basement.Compat.CallStack
    ( HasCallStack
    ) where

#if MIN_VERSION_base(4,9,0)

import GHC.Stack (HasCallStack)

#elif MIN_VERSION_base(4,8,1)

import qualified GHC.Stack

type HasCallStack = (?callStack :: GHC.Stack.CallStack)

#else

import GHC.Exts (Constraint)

type HasCallStack = (() :: Constraint)

#endif