regex-pcre：我需要什麼進口？

Question

我安裝我的第一個Haskell包陰謀：

$ cabal install regex-pcre 

可以用正則表達式PCRE所以我可以找出我應該導入有人張貼一個簡單的例子？

Answer 1

好吧，我想通了。你需要的模塊是Text.Regex.PCRE。對於POSIX正則表達式，它是Text.Regex.Posix。這裏有一個例子：

ghci>:m +Text.Regex.PCRE 
ghci>"heeeee" =~ "hee|he*" :: [[String]] 
Loading package array-0.4.0.0 ... linking ... done. 
Loading package bytestring-0.9.2.1 ... linking ... done. 
Loading package deepseq-1.3.0.0 ... linking ... done. 
Loading package containers-0.4.2.1 ... linking ... done. 
Loading package transformers-0.3.0.0 ... linking ... done. 
Loading package mtl-2.1.2 ... linking ... done. 
Loading package regex-base-0.93.2 ... linking ... done. 
Loading package regex-pcre-0.94.4 ... linking ... done. 
[["hee"]] 

ghci>:m -Text.Regex.PCRE 
ghci>:m +Text.Regex.Posix 
ghci>"heeeee" =~ "hee|he*" :: [[String]] 
Loading package regex-posix-0.95.2 ... linking ... done. 
[["heeeee"]]