Re: [boost] Deprecation and Boost

From: David Abrahams (dave_at_[hidden])
Date: 2006-05-05 02:34:36

"AlisdairM" <alisdair.meredith_at_[hidden]> writes:

> It has been agreed that several platforms will be deprecated in this
> version of Boost.  To support that I have added a warning to the
> Borland config to alert anyone using old versions of this platform that
> it is being deprecated and this is the last compatible release.
>
> What I notice is the warning gets annoying pretty quickly.
>
> I propose to wrap the warning in the following test:
>
> #if __BORLANDC__ <= 0x581 && !defined(BOOST_ACKNOWLEDGE_DEPRECATED_1_34)
> #  pragma message "...";
> #endif
>
> This will allow users to disable the warning by defining the macro in
> their environment.
>
> I would like to extend this to a general policy, to make deprecation
> more visible were it occurs.  Using the BOOST_ACKNOWLDGE_DEPRECATED
> test we could deprecate libraries or functions, as well as platforms.
>
> The test is a simple 'does this macro exist' rather than testing for a
> value, so should be compatible with toolchains that allow defining
> macros, but not giving them values.
>
> The macro is tied to the specific version that is deprecated, so in
> later releases we should grep for BOOST_DEPRECATED and either update
> the version, or do something stronger such as use #error (platform) or
> remove the code entirely (library)

I'm not sure it works to acknowledge all deprecations at once.  You
might try a different deprecated toolset, library, or user construct
later, and you'll never get warned.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com