I haven't played much with instances, but it looks to me like
tcInstDecls1, in typecheck/TcInstDecls.lhs, is a good place. Toward the
end of the body of that function is a bunch of checks in the style that
you will need to write (such as for bogus Typeable instances).
I hope this helps!
Richard
On 2013-07-31 13:56, David Luposchainsky wrote:
Hey Devs,
I haven't worked on GHC before, so I'm having trouble finding an entry
point to implementing the AMP warnings (#8004). I only have a rough
working knowledge of GHC's inner workings, but it would be a shame if
the ticket wasn't resolved until the 7.8 deadline (which is somewhere
in
September if I remember it right).
My last approach was grepping through the source for DEPRECATED and
seeing whether there would be an appropriate place for these warnings
there, but that wasn't very fruitful.
Long story short: can anyone point me in the right direction? I assume
the right place to look is somewhere in the typechecker where there's a
type class environment, and that's as far as I've come. (It's hard to
understand thousands of lines when you're not even sure you're in the
right place ...)
Greetings,
David
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