Boost logo

Boost :

Subject: Re: [boost] enable_if and non-template member functions?
From: Emil Dotchevski (emildotchevski_at_[hidden])
Date: 2011-08-06 15:43:31

On Sat, Aug 6, 2011 at 1:38 AM, John Maddock <boost.regex_at_[hidden]> wrote:
> Folks, I have a problem with enable_if:  it works just dandy for template
> member functions in my class, but I have some *non-template* member
> functions and constructors that I want to enable only if the template is
> instantiated with template args that meet certain criteria.  Seems like I
> can't do this with enable_if as it then generates an invalid class
> definition.  I guess I could use base classes, and/or partial
> specialization, but both involve a lot of code duplication I'd rather not
> have.  Anyone any ideas?

I'm afraid what I'm suggesting is obvious and you probably thought of
it already but you could convert your design to use namespace-scope
function templates instead of member functions of a class template.

If you insist on the member function call syntax, you could add member
functions that forward to the (enable-iffed) namespace-scope

Emil Dotchevski
Reverge Studios, Inc.

Boost list run by bdawes at, gregod at, cpdaniel at, john at