Re: [boost] VIGRA - Image processing for boost

From: Ullrich Koethe (u.koethe_at_[hidden])
Date: 2001-11-21 06:40:30

Alexandre Karev wrote:
> 
> On Tue, 20 Nov 2001, Ullrich Koethe wrote:
> 
> u.koethe >On g++, this doesn't work with std::vector<bool> either, because
> u.koethe >std::vector<bool>::operator[] returns a proxy (type _Bit_reference).
> u.koethe >
> u.koethe >BTW, on g++ 'sizeof(bool) == 4'. So Image<unsigned char> will be smaller
> u.koethe >than Image<bool> unless the latter is packed, with all problems that the
> u.koethe >use of proxies implies.
> u.koethe >
> 
>         On which platform 'sizeof(bool) == 4'?
> 

This is g++ on Solaris:

# g++ -v
Reading specs from
/software/gcc-2.95.2/SunOS-5.6/lib/gcc-lib/sparc-sun-solaris2.6/2.95.2/specs
gcc version 2.95.2 19991024 (release)
# uname -a
SunOS kogs51 5.8 Generic sun4u sparc SUNW,Ultra-5_10
# aa.cc
sizeof( bool ) is 4

Ulli
 
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| Ullrich Koethe  Universität Hamburg / University of Hamburg    |
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