Re: [boost] [Jean-Marc Lasgouttes <[e-mail]>] Re: CVS Update: lyx-devel

From: larsbj_at_[hidden]
Date: 2001-06-08 04:33:05

Jens Maurer <Jens.Maurer_at_[hidden]> writes:

Ok, this fix works. So we are using this until something better comes
up.

        Lgb

| larsbj_at_[hidden] wrote:
| > 
| > We are trying to use the boost::crc lib with lyx, but have this
| > problem with Compaq cxx:
| 
| > Well, the test case is
| > ------
| > #include <boost/crc.hpp>
| > ------
| > The error message is
| 
| > fantomas: cxx -V
| > Compaq C++ V6.2-024 for Digital UNIX V4.0F  (Rev. 1229)
| 
| I could reproduce the error.  Note that the regression tests use
| Compaq C++ V6.3-008 now.
| 
| BOOST_STATIC_CONSTANT is expanded to "static const", not "enum"
| on this platform.  I believe this is mostly ok.  Using the "enum"
| definition for BOOST_STATIC_CONSTANT leads to the same error.
| 
| It appears that this compiler version does not regard integral
| constant expressions involving type casts as such.
| 
| Here's a fix which makes the regression test work.  This fix
| should be further conditioned on __DECCXX_VER < 60300000
| (with a comment pointing to Compaq C++ 6.2-024).  The fix
| tastes sufficiently bad that I would prefer someone else
| checks it into the CVS, possibly after approval by Daryle.
| 
| Jens Maurer
| 
| 
| diff -u -r1.1 crc.hpp
| --- crc.hpp     2001/05/16 12:55:41     1.1
| +++ crc.hpp     2001/06/01 18:12:39
| @@ -280,10 +280,15 @@
|          typedef typename base_type::least  least;
|          typedef typename base_type::fast   fast;
|  
| +#ifdef __DECCXX
| +       static const least high_bit = 1ul << ( Bits - 1u );
| +        static const fast high_bit_fast = 1ul << ( Bits - 1u );
| +#else
|          BOOST_STATIC_CONSTANT( least, high_bit = (least( 1u ) << ( Bits
|           - 1u )) );
|          BOOST_STATIC_CONSTANT( fast, high_bit_fast = (fast( 1u ) << ( Bits
|           - 1u )) );
| +#endif
|  
|      };  // boost::detail::high_uint_t
|  
| @@ -340,7 +345,11 @@
|          BOOST_STATIC_CONSTANT( fast, high_bit_fast = base_type::high_bit_fast );
|          #endif
|  
| +#ifdef __DECCXX
| +       static const least sig_bits = (~( ~( 0ul ) << Bits )) ;
| +#else
|          BOOST_STATIC_CONSTANT( least, sig_bits = (~( ~(least( 0u )) << Bits )) );
| +#endif
|          BOOST_STATIC_CONSTANT( fast, sig_bits_fast = fast(sig_bits) );
|  
|      };  // boost::detail::mask_uint_t
| 
| 
| Jens Maurer
| 
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