Re: [boost] New, powerful way to use enable_if in C++0x

Subject: Re: [boost] New, powerful way to use enable_if in C++0x
From: Beman Dawes (bdawes_at_[hidden])
Date: 2011-04-11 20:58:39

On Mon, Apr 11, 2011 at 5:38 PM, Steven Watanabe <watanabesj_at_[hidden]> wrote:
> AMDG
>
> On 04/11/2011 11:40 AM, Jeffrey Lee Hellrung, Jr. wrote:
>>
>> On Mon, Apr 11, 2011 at 11:15 AM, Matt Calabrese<rivorus_at_[hidden]>
>>  wrote:
>>
>>> However, in C++0x, there is a new way to use enable_if by altering
>>> neither
>>> the function parameter list nor the specification of the return type. It
>>> can
>>> be used with operators, constructors, variadic function templates, and
>>> even
>>> overloaded conversion operations (the latter of which was previously
>>> considered impossible). The way to do it is with C++0x default function
>>> template parameters.
>>>
>>> <snip> Should such use be added to the docs as supported behavior in 0x
>>> compilers?
>>>
>>
>> I think the case for conversion operators alone is compelling enough to
>> warrant this use being mentioned in the Boost.EnableIf docs...
>>
>
> I agree.  Matt, how about making a patch for
> the docs?

+1

This is seriously slick, and needs to be added to the enable_if  docs
as soon as possible.

The example code is a model of clarity, IMO, and should also become
part of the docs.

--Beman