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From: Hendrik Boom <hendrik@topoi.pooq.com>
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Subject: Re: [Caml-list] destructive local opens

On Mon, Aug 17, 2015 at 05:18:13PM +0200, Gabriel Scherer wrote:
> Note that forcing you to use "let open! M" instead of M.!(...) is
> already a way to make you pay.

You shouldn't have to pay to use a feature.  Verbosity is appropriate 
for a rarely used feature that you could otherwise easily use by 
accident without noticing it.  And someone reading the code should then 
also notice it.

-- hendrik