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Re: Remove algo code duplication
On Fri, 4 May 2012, Marc Glisse wrote:
On Fri, 4 May 2012, François Dumont wrote:
I though that I wouldn't have to take care of this kind of use case but you
are right I better handle it correctly.
So I am going to write tests challenging the number of constructors invoked
when algos are used with or without my patch, in C++98 and C++11 modes.
To be continued...
To be clear: I don't think it is possible to remove the operator< special
case and replace it with a forwarding functor (like you wrote, or like
Jonathan's) without some detectable difference. The only chance I can see
would be to somehow get the right &operator< (how do you ask the compiler to
perform overload resolution, but then not apply the function, just give you a
pointer?) and pass that bare function pointer to the algorithm.
Or instead of using directly a functor on the values, one could write the
algorithm using a functor on iterators, which would take a and b and
return either *a<*b or cmp(*a,*b). Maybe not so nice.
--
Marc Glisse