gistfile1.hs

Prelude Text.Regex.Posix> "bar" =~ "(foo|bar)" :: Bool

<interactive>:1:7:
    No instances for (RegexMaker Regex CompOption ExecOption [Char],
                      RegexContext Regex [Char] Bool)
      arising from a use of `=~'
    Possible fix:
      add instance declarations for
      (RegexMaker Regex CompOption ExecOption [Char],
       RegexContext Regex [Char] Bool)
    In the expression: "bar" =~ "(foo|bar)" :: Bool
    In an equation for `it': it = "bar" =~ "(foo|bar)" :: Bool