George Russell wrote:
Since it hasn't been mentioned yet I should also point people once
again to "Functional Pearl: Implicit Configurations" by Oleg and
Chung-chieh
Shan, which ingeniously uses polymorphic recursion to construct type
class instances at run time. If there's a safe and sane way to add
local dictionaries to the language, it's probably along those lines.
It is very ingenious to encode complex configuration information by
chains of types, but
it is something I recoil from in horror.
Yes, but I think the point is that local instances make sense since
you can encode them like this. And if they make sense it might
be a good idea to add them to make life less encoded. :)
-- Lennart
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