>From: Christophe Delage <cdelage@ens-lyon.fr>

> mykprintf : (string -> 'b) -> ('a, string -> 'b, 'b) format -> 'a
>
>and (as far as I know) there were no problems,

Consider this:

   mykprintf f "%a" g x

If x has type 'c, then g must have type (string -> 'b) -> 'c -> 'b;
mykprintf will call (g f x) and insert the result (which has type 'b)
in the string that will be passed to f as argument.  This can only
make sense if 'b = string.

-- Damien
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