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Subject: Re: [boost] [outcome] some problems compiling
From: Niall Douglas (s_sourceforge_at_[hidden])
Date: 2017-05-24 11:28:52

>>> 2. This class and subsequent functions are defined in anonymous
>> namespace.
>>> This means they are redefined and recompiled in each translation unit,
>> and
>>> remain a per TU definition. Is that intent?
>> Yes. Because it's a C source file, you would get symbol collision errors
>> otherwise.
> Can't the same effect be achieved with declaring the functions inline? And
> then you would only get one symbol.

We would then collide with anyone who later includes <windows.h>,
because we are defining the exact same symbol names as windows in order
to avoid including windows, so it would be an ODR violation.

It's a trick to include windows without including windows which only
works on MSVC by taking advantage of its lax parser. That's why on clang
we just go ahead and include windows.


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