Message: 2 Date: Mon, 27 Sep 2010 23:32:42 -0400 From: Johan Tibell Subject: Re: Monadic version of functions for containers (adjustM, updateWithKeyM, etc) To: Thomas DuBuisson Cc: Haskell Libraries Message-ID:

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On Mon, Sep 27, 2010 at 6:13 PM, Thomas DuBuisson wrote:

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All,

Is there a reason not to have monadic version of the functions in containers? I've a need for functions of type:

Ack! Haskell needs effect polymorphism. The API already has 150 functions. How many more do we need to add if we want to cover all the monadic versions?

More than anything else, I wish this would be solved for Haskell'. Unfortunately I don't have anything like an implementation or even a proposal. John