在Haskell中找不到模块“System.Console.Readline” [英] Could not find module 'System.Console.Readline' in Haskell

问题描述

当我尝试在ghci中执行：load hello.hs 时，出现以下错误：

无法找到模块System.Console.Readline
  

从这是一个系统模块，我认为这会起作用。如何解决这个问题？

解决方案

根据您的系统，您需要安装 readline Haskell包。

为此，请确保您通过 apt-get （Ubuntu），macports（Mac OSX），Cygwin（Windows？），或者您喜爱的软件包管理器在您的平台上。

cabal 已安装，只需运行
cabal install readline ，并希望所有内容都可以编译，您可以尝试运行你的 hello.hs 又一次！

如果你没有 cabal ，它是一种用于从HackageDB获取和管理软件包的命令行界面。按照 haskell.org/cabal 上的说明获取 cabal 。如果不是必要的话，这非常方便：D

When I try to execute :load hello.hs in ghci, I get the following error:

Could not find module "System.Console.Readline"

Since this is a System module, I thought this would work. How do I fix this?

解决方案

Depending on your system, you will want to install the readline Haskell package.

To do so, make sure that you have GNU readline actually installed via apt-get (Ubuntu), macports (Mac OSX), Cygwin (Windows?), or whatever your favourite package manager is on your platform.

If you have Haskell's cabal installed, simply run cabal install readline and hopefully everything will compile, and you can try and run your hello.hs again!

If you don't have cabal, it's a sort of command line interface for grabbing and managing packages from HackageDB. Follow the instructions on haskell.org/cabal to get cabal. It's pretty handy to have, if not essential :D

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