Question

在开发过程中，我已经向package.yaml添加了一个库，并且GHCi已经启动。

例如，我添加了bytestring库：

executables:
  playground-exe:
    main:                Main.hs
    source-dirs:         app
    ghc-options:
    - -threaded
    - -rtsopts
    - -with-rtsopts=-N
    dependencies:
    - playground
    - text
    - bytestring

因为我在名为Families.hs的文件中使用了它，它包含以下代码：

{-# LANGUAGE  TypeFamilies, OverloadedStrings #-}

module Families where

import Data.Word (Word8)
import qualified Data.ByteString as BS

当我尝试加载文件时，它抱怨：

:l ./src/Families.hs
[1 of 1] Compiling Families         ( src/Families.hs, interpreted )

src/Families.hs:6:1: error:
    Could not load module ‘Data.ByteString’
    It is a member of the hidden package ‘bytestring-0.10.8.2’.
    You can run ‘:set -package bytestring’ to expose it.
    (Note: this unloads all the modules in the current scope.)
    Use -v to see a list of the files searched for.
  |
6 | import qualified Data.ByteString as BS
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Failed, no modules loaded.

问题是，如何将整个项目重新加载到GHCi中，并允许使用bytestring库。

更新
我也尝试过:reload并得到

:reload
[1 of 1] Compiling Families         ( src/Families.hs, interpreted )

src/Families.hs:6:1: error:
    Could not load module ‘Data.ByteString’
    It is a member of the hidden package ‘bytestring-0.10.8.2’.
    You can run ‘:set -package bytestring’ to expose it.
    (Note: this unloads all the modules in the current scope.)
    Use -v to see a list of the files searched for.
  |
6 | import qualified Data.ByteString as BS
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Failed, no modules loaded.

Answer 1

我看到您正在将Spacemacs与intero一起使用。在这种情况下，您可以通过键入M-x intero-restart RET或M-RET i r重新启动整个内部操作过程，这将重新加载所有堆栈依赖项。

另一种方法是将光标放在错误导入上，然后键入C-c C-r，让intero自动解决该问题。

添加依赖项后如何重新加载项目？

1 个答案: