RE: [boost] has_member?

From: Aleksey Gurtovoy (agurtovoy_at_[hidden])
Date: 2002-03-22 10:06:46

Vladimir Prus wrote:
> With both g++ 3.0 and online Comeau compiler it just says 
> that "my" has no member "foo", which is supposedly not what 
> you want? I don't understand how this can work at all: if 
> default parameter is never instantiated (which is what my 
> inderstanding of std::14.7.1/[1-2] suggests, but contrary to 
> compiler's opinion), 

Well, it is instantiated (otherwise, how you could call a 2-parameters
function with a single argument?), but _after_ the overload resolution took
place - here's the error. See Jason's post for a way to make it work.

> there's not way to check if the member 
> is present. Otherwise, you'll have compile error.

Aleksey