Question

我有一个脚本

#!/usr/bin/env stack

{-# LANGUAGE QuasiQuotes #-}

module Script where

import qualified Data.Set as Set (Set, fromList)
import           Data.Maybe             (fromJust)
{- import Text.RawString.QQ not neccessary for demonstration -}

main :: IO()
main = print "foo"

我和stack --resolver lts-12.5 runghc --package raw-strings-qq Script.hs一起跑

但是我无法将其加载到GHCi中：

$ stack ghci --resolver lts-12.5 --package raw-strings-qq 

Note: No local targets specified, so a plain ghci will be started with no package hiding or package options.

      If you want to use package hiding and options, then you can try one of the following:

      * If you want to start a different project configuration than /home/t/.stack/global-project/stack.yaml, then you can use stack init to create a new
        stack.yaml for the packages in the current directory. 

      * If you want to use the project configuration at /home/t/.stack/global-project/stack.yaml, then you can add to its 'packages' field.

Configuring GHCi with the following packages: 
GHCi, version 8.4.3: http://www.haskell.org/ghc/  :? for help
Loaded GHCi configuration from /tmp/haskell-stack-ghci/2a3bbd58/ghci-script
Prelude> :load Script.hs
[1 of 1] Compiling Script           ( Script.hs, interpreted )

Stacko.hs:7:1: error:
    Could not find module ‘Data.Set’
    Perhaps you meant Data.Int (from base-4.11.1.0)
    Use -v to see a list of the files searched for.
  |
7 | import qualified Data.Set as Set (Set, fromList)
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Failed, no modules loaded.

自己的研究：

如果我仅用stack ghci --resolver lts-12.5开始ghci，就可以加载文件。
有趣的是，当我像导入Data.Set一样导入Data.Maybe'不合格'时：

import Data.Set
import Data.Maybe

错误仍然存在，但是当我将Data.Set导入全部放在一起时，我可以加载Script.hs

无效的导入：Data.Set，Data.Map.Strict
有效的导入：Data.List，Data.Function，Data.Maybe
产生错误的软件包：raw-strings-qq，HUnit

如果导入了外部包，则GHCi无法加载导入Data.Set或Data.Maybe的脚本

自己的研究：

0 个答案: