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C++ conversion operator to unsigned long does not work
- To: gcc-bugs at gcc dot gnu dot org
- Subject: C++ conversion operator to unsigned long does not work
- From: Martin Reinecke <martin at MPA-Garching dot MPG dot DE>
- Date: Thu, 28 Sep 2000 16:04:38 +0200
- Organization: Max-Planck-Institut fuer Astrophysik
Hi!
gcc-2.95.2 and the current CVS version fails to compile the following code:
int main()
{
int a = 1;
unsigned int b = unsigned long(a);
}
~/tmp>g++ -v test.cc
Reading specs from /usr/local/appl/gcc-2.95.2/lib/gcc-lib/i686-pc-linux-gnu/2.95.2/specs
gcc version 2.95.2 19991024 (release)
/usr/local/appl/gcc-2.95.2/lib/gcc-lib/i686-pc-linux-gnu/2.95.2/cpp -lang-c++ -v -D__GNUC__=2 -D__GNUG__=2 -D__GNUC_MINOR__=95 -D__cplusplus -D__ELF__ -Dunix -D__i386__
-Dlinux -D__ELF__ -D__unix__ -D__i386__ -D__linux__ -D__unix -D__linux -Asystem(posix) -D__EXCEPTIONS -Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386__ -Di686
-Dpentiumpro -D__i686 -D__i686__ -D__pentiumpro -D__pentiumpro__ test.cc /tmp/ccea4Y4y.ii
GNU CPP version 2.95.2 19991024 (release) (i386 Linux/ELF)
#include "..." search starts here:
#include <...> search starts here:
/usr/local/appl/gcc-2.95.2/lib/gcc-lib/i686-pc-linux-gnu/2.95.2/../../../../include/g++-3
/usr/local/include
/usr/local/appl/gcc-2.95.2/lib/gcc-lib/i686-pc-linux-gnu/2.95.2/../../../../i686-pc-linux-gnu/include
/usr/local/appl/gcc-2.95.2/lib/gcc-lib/i686-pc-linux-gnu/2.95.2/include
/usr/include
End of search list.
The following default directories have been omitted from the search path:
End of omitted list.
/usr/local/appl/gcc-2.95.2/lib/gcc-lib/i686-pc-linux-gnu/2.95.2/cc1plus /tmp/ccea4Y4y.ii -quiet -dumpbase test.cc -version -o /tmp/ccGAXDG1.s
GNU C++ version 2.95.2 19991024 (release) (i686-pc-linux-gnu) compiled by GNU C version 2.95.2 19991024 (release).
test.cc: In function `int main()':
test.cc:4: parse error before `long'
gcc seems to choke because the name of the type to which a should be converted consists of two tokens.
I'm not absolutely sure that the code above is legal C++; but if not, how does one write such a conversion
properly?
Thanks in advance,
Martin