Re: [boost] Boost::format, MSVC, BOOST_TESTED_AT

From: David Abrahams (dave_at_[hidden])
Date: 2003-03-19 22:06:51

"Giovanni Bajo" <giovannibajo_at_[hidden]> writes:

> ----- Original Message -----
> From: "David Abrahams" <dave_at_[hidden]>
> To: "Boost mailing list" <boost_at_[hidden]>
> Sent: Thursday, March 20, 2003 2:59 AM
> Subject: Re: [boost] Boost::format, MSVC, BOOST_TESTED_AT
>
>
>> > #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1300))
>> > #error blah
>> > #endif
>> >
>> > always aborts compilation.
>
>> That's exactly what it's supposed to do.  What are you expecting?
>
> Ok, I read again everything and I eventually got it. The part that was
> misleading me was: "It only has value as a comment unless
> BOOST_DETECT_OUTDATED_WORKAROUNDS is defined". It's not clear *what* it's
> treated as a comment. I thought it was meaning that BOOST_TESTED_AT was
> silenty ignored if BOOST_DOW was not defined, thus leading to:
>
> #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
>
> The previous sentence might be rephrased to "When BOOST_DOW is not defined,
> the macro evaluates to != 0, which effectively activates the workaround for
> any version of the compiler. When BOOST_DOW is defined, it will issue a
> compiler warning or error if the compiler version exceeds the argument".

Great!  Why don't you check in a documentation fix?

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