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MakeLenses.hs编译错误 #51

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bluebirddm opened this issue Feb 4, 2018 · 1 comment

bluebirddm commented Feb 4, 2018

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winterland1989 commented Feb 8, 2018

是新版的 ghc 的语言变化造成了，需要显式的通过 ForallT 引入类型变量 f ，新版书会做相应更新，多谢！

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