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Subject: Re: [boost] Compiler Warnings Tests
From: Stewart, Robert (Robert.Stewart_at_[hidden])
Date: 2009-11-30 08:48:35

Paul A. Bristow wrote:
> Stewart, Robert wrote:
> >
> > It might be possible to wrap the code that is supposed to
> > warn with a macro that dictates the expected behavior:
> >
> > BOOST_MUST_WARN(short a1(b + c));
> Either looks plausible, but I would just remind you that
> there are only about 20
> code constructs where warnings that seem to cause trouble, so
> are you sure we are not making a mountain out of a molehill?
> If either or both produce a working example for just one type
> of warning, I'll
> do the grunt work in setting up the test for all (20 of) the
> rest - for my
> sins, since I moaned too much about warnings in the first place ;-)

You're probably right. At the least, having a standard mechanism for producing a failure when a compiler isn't expected to warn is probably desirable. Perhaps that should be captured in a reusable macro: BOOST_SYNTHESIZE_WARNING or something. Then you can use the simpler conditional compilation and avoid the extra work to create a suitable BOOST_MUST_WARN for each test. I don't think the latter is complicated, but I do wonder if we'll find it hard to insert all necessary code in the macro invocation for all cases. IOW, it is probably better to follow the conditional compilation with BOOST_SYNTHESIZE_WARNING approach.

Rob Stewart robert.stewart_at_[hidden]
Software Engineer, Core Software using std::disclaimer;
Susquehanna International Group, LLP

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