[boost] [Boost-bugs] [ boost-Bugs-1242266 ] Move comments in BOOST_STATIC_CONSTANT

From: SourceForge.net (noreply_at_[hidden])
Date: 2005-07-21 07:59:11

Bugs item #1242266, was opened at 2005-07-21 05:59
Message generated for change (Tracker Item Submitted) made by Item Submitter
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Category: type_traits
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: John Maddock (johnmaddock)
Summary: Move comments in BOOST_STATIC_CONSTANT

Initial Comment:
There appears to be some comments in one of the 
macro function calls of BOOST_STATIC_CONSTANT 
(line 124 of "type_traits/is_enum.hpp): 

   BOOST_STATIC_CONSTANT(bool, selector =
      (::boost::type_traits::ice_or<
           ::boost::is_arithmetic<T>::value
         , ::boost::is_reference<T>::value
         , is_class_or_union<T>::value
       // However, not doing this on non-conforming 
compilers prevents
       // a dependency recursion.
      >::value));

This is not incorrect but it expands to incorrect code in 
case you run the Visual Studio.NET 2002/2003/2005 
C++ compiler with the compiler options "/E /C". The 
result after preprocessing is:

// However, not doing this on non-conforming compilers 
prevents// a dependency recursion.enum { selector = 
(::boost::type_traits::ice_or< ::boost::is_arithmetic<T>::v
alue , ::boost::is_reference<T>::value , 
is_class_or_union<T>::value >::value) };

which obviously hides the definition of "selector"!  Since 
we are performing code checking on the preprocessed 
file our code checker is unable to check C++ files that 
contain "is_enum.hpp".

This is clearly a bug in the Visual Studio C++ compiler, 
but my hopes are that the comments can be moved in 
Boost, e.g. towards the start of the macro function call 
or the end. This will solve the problem of being able to 
code check this file. It might solve problems with other 
preprocessors as well.

In case you need further details, contact me at 
Paul.Jansen_at_tiobe.com.

Regards,

Paul Jansen

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