Re: [Haskell-cafe] Problem on overlapping instances

You can't. If you have special semantics for [String], then it is not really a [String], it is something else. So let the type system know that: newtype SomethingElse = SomethingElse [String] instance Binary SomethingElse where ... On Wed, Jan 5, 2011 at 1:24 AM, Magicloud Magiclouds wrote:

Hi, I am using Data.Binary which defined "instance Binary a => Binary [a]". Now I need to define "instance Binary [String]" to make something special for string list. How to make it work? I looked into the chapter of overlappinginstances, nothing works. -- 竹密岂妨流水过 山高哪阻野云飞

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