Haskell进口报关单 [英] Haskell import declaration

问题描述

我开始阅读有关monad转换器的文章，令我感到困惑的是 Control.Monad.CatchIO 的导入声明，我在许多代码示例中都可以看到:

I started to read about monad transformers and what puzzles me is Control.Monad.CatchIO's import declaration which I see in many code examples:

import "MonadCatchIO-transformers" Control.Monad.CatchIO (finally)

此引用令牌是什么意思?我看了 Haskell 98报告中有关导入声明的部分，但是这没有帮助我理解.

What does this quoted token mean? I took a look at the Haskell 98 Report's section on import declarations, but this didn't help me understand.

推荐答案

它是程序包限定的导入，它是GHC扩展.该字符串是程序包名称.

Its a package-qualified import, which is a GHC extension. The string is a package name.

请参见包装-ghc文档中的合格进口商品，以获取详细信息.

See Package-qualified imports, from the ghc docs, for details.

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