Haskell语言学习笔记（52）正则表达式

Text.Regex.PCRE.Heavy

$ brew install pcre
$ cabal install pcre-heavy
Installed pcre-heavy-1.0.0.2
Prelude> :m +Text.Regex.PCRE.Heavy
Prelude Text.Regex.PCRE.Heavy> 

Prelude Text.Regex.PCRE.Heavy> :set -XQuasiQuotes
Prelude Text.Regex.PCRE.Heavy> :set -XFlexibleContexts
Prelude Text.Regex.PCRE.Heavy> "123-4567-89" =~ [re|\d{3}-(\d{4})-\d{2}|]
True
Prelude Text.Regex.PCRE.Heavy> scan [re|\d{3}-(\d{4})-\d{2}|] "123-4567-89"
[("123-4567-89",["4567"])]
Prelude Text.Regex.PCRE.Heavy> :set -XScopedTypeVariables
Prelude Text.Regex.PCRE.Heavy> gsub [re|\d+|] (\(s::String) -> reverse s) "123-4567-89"
"321-7654-98"