    {-# LANGUAGE CPP             #-}

    #if MIN_VERSION_base(4,8,1)
    {-# LANGUAGE TemplateHaskell #-}
    {-# OPTIONS_GHC -fno-warn-orphans #-}
    #endif
    {-|
    Module:      TextShow.GHC.Stack
    Copyright:   (C) 2014-2017 Ryan Scott
    License:     BSD-style (see the file LICENSE)
    Maintainer:  Ryan Scott
    Stability:   Provisional
    Portability: GHC

    'TextShow' instances for 'CallStack' and 'SrcLoc' values.
    Only provided if using @base-4.8.1.0@ or later.

    /Since: 3.0.1/
    -}
    module TextShow.GHC.Stack () where

    #if MIN_VERSION_base(4,8,1)
    import GHC.Stack (CallStack)
    # if MIN_VERSION_base(4,9,0)
    import GHC.Stack (SrcLoc, getCallStack)
    import TextShow.Classes (TextShow(..))
    # else
    import GHC.SrcLoc (SrcLoc)
    # endif

    import TextShow.Data.Char     ()
    import TextShow.Data.Integral ()
    import TextShow.Data.List     ()
    import TextShow.Data.Tuple    ()
    import TextShow.TH.Internal (deriveTextShow)

    -- | /Since: 3.0.1/
    $(deriveTextShow ''SrcLoc)

    # if MIN_VERSION_base(4,9,0)
    -- | /Since: 3.0.1/
    instance TextShow CallStack where
        showb :: CallStack -> Builder
    showb = [([Char], SrcLoc)] -> Builder
    forall a. TextShow a => a -> Builder
    showb ([([Char], SrcLoc)] -> Builder)
    -> (CallStack -> [([Char], SrcLoc)]) -> CallStack -> Builder
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . CallStack -> [([Char], SrcLoc)]
    getCallStack
        {-# INLINE showb #-}
    # else
    -- | /Since: 3.0.1/
    $(deriveTextShow ''CallStack)
    # endif
    #endif