Re: [boost] [CallableTraits] The formal review begins today

On Apr 3, 2017, at 1:34 PM, Peter Dimov via Boost wrote:

Tim Song wrote:

...

The issue was, I believe, whether the const implied by the constexpr gave the variable template internal linkage; even though they are templates, that doesn't help with the ODR problem if they are actually different templates.

Yes, it would be similar to the (mostly theoretical) problem created by _1, if passed by reference to a template.

Its more than theoretical, with internal linkage it will bloat the binary with duplicate symbols. Most linkers can remove these duplicates, but do not always and are not required to.