Some crazy stuff (was Lua 5.3 changes to .__eq)

[Mike Nelson <mikestar1313@...>]

In my heavily hacked personal copy of Lua which I use for 
experimentation, I go one further: If either operand regardless of type 
has an .__eq metamethod, a==b returns the result of the appropriate 
metamethod even if rawequal(a,b) returns true, thus allowing such 
atrocities as 7==Complex:new(7,0) to return true and a==a (where a is a 
usertype with a nan-like value) to return false. I'm now working on the 
C code to have a>b call a's .__lt metamethod if both operands define 
metamethods, and to have a<=b in the absense of .__le metamethods but 
the presence of .__lt metamethods be evaluated as (a==b) or (a<b) rather 
than the current not (b<a).

The above is strictly for fun and contains no serious proposals, but I 
have used my hacked copy to experiment with changes suggested on the list.

-- Mike Nelson