Re: [Boost-users] Can not compile a program that uses typeof package by gcc?

AMDG Peng Yu wrote:

I'm confused. You agreed above that multiply_traits shall be defined in B::detail. Down below, you said that it's better not to put user defined code in B::detail, while multiply_traits corresponding to X1, X2,..., are user defined code.

Then where do I need to put multiply_traits?

What I meant to say was that if library B contains a function that needs to deduce the result type of a multiplication, then it should put a typeof based multiply_traits in B::detail. It doesn't matter what X1, X2, etc are because Boost.Typeof handles the actual deduction. If you have a different multiply_traits for every type, then it is completely useless in generic code. In Christ, Steven Watanabe