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

Subject: Re: [boost] [Config] Support for switching between std:: and boost:: equivalents.
From: Sylvester-Bradley, Gareth (Gareth.Sylvester-Bradley_at_[hidden])
Date: 2015-06-05 06:15:16

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'.

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

Best regards,
Gareth

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