Re: [boost] [Config] Support for switching between std:: and boost:: equivalents.

Subject: Re: [boost] [Config] Support for switching between std:: and boost:: equivalents.
From: Edward Diener (eldiener_at_[hidden])
Date: 2015-06-05 10:32:44

On 6/5/2015 6:15 AM, Sylvester-Bradley, Gareth wrote:
> On 05 June 2015 10:30, Edward Diener wrote:
>> On 6/5/2015 3:41 AM, John Maddock wrote:
>>> There is a pull-request for Config to provide support for switching
>>> between boost:: and std:: library equivalents:
>>> https://github.com/boostorg/config/pull/63
>>>
>>> My questions are:
>>>
>>> * Is this the right approach?  And,
>>> * Is Boost.Config the right place for it?
>>>
>>> Thanks for your comments, John.
>>
>> That is my pull request so I will comment now that you have so graciously provided a forum for my idea.
>>
>> I don't know what "the right approach" would be but this is one approach that does work easily, following the documentation I have written about it and added to the Boost.config documentation.
>
> [snip good detection/reporting macros stuff]
>
>> 3) In code for that library's functionality use the namespace macro provided for accessing the library's functionality:
>>
>> BOOST_CPP_XXX_NS::some_functionality etc.
>
> It would be useful to compare the BOOST_CPP_XXX_NS macro approach to providing a namespace with using declarations. I use 'bst'.

You could just as easily write:

using namespace BOOST_CPP_XXX_NS;

>
> One advantage is flexibility to adapt the mapping where necessary, e.g. while Boost placeholders were in boost, but std::placeholders.