有没有办法在 GHCI 中查看模块中的函数列表? [英] Is there a way to see the list of functions in a module, in GHCI?

问题描述

我发现在 Python 或 Common Lisp 中你可以在运行时列出库的内容很方便.Haskell 是否有同样的东西，特别是在 GHCI 提示中?

I find it handy in Python or Common Lisp that you can list a library's contents at runtime. Does Haskell have the same thing, in particular from a GHCI prompt?

推荐答案

GHCi 有一个 :browse 命令来列出模块的内容:

GHCi has a :browse command to list the contents of modules:

Prelude> :browse Data.List
(\) :: (Eq a) => [a] -> [a] -> [a]
delete :: (Eq a) => a -> [a] -> [a]
deleteBy :: (a -> a -> Bool) -> a -> [a] -> [a]
deleteFirstsBy :: (a -> a -> Bool) -> [a] -> [a] -> [a]
elemIndex :: (Eq a) => a -> [a] -> Maybe Int
...
Prelude> :help                    
...
   :browse[!] [[*]<mod>]       display the names defined by module <mod>
                               (!: more details; *: all top-level names)
...

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