[Boost-bugs] [Boost C++ Libraries] #5855: narrowing conversion error with -std=c++0x in operator< with int_type != int

Subject: [Boost-bugs] [Boost C++ Libraries] #5855: narrowing conversion error with -std=c++0x in operator< with int_type != int
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-09-01 19:23:22

#5855: narrowing conversion error with -std=c++0x in operator< with int_type !=
int
-------------------------------------+--------------------------------------
 Reporter:  mlang@…                  |       Owner:  turkanis
     Type:  Bugs                     |      Status:  new     
Milestone:  To Be Determined         |   Component:  rational
  Version:  Boost Development Trunk  |    Severity:  Problem 
 Keywords:                           |  
-------------------------------------+--------------------------------------
 With GCC (4.6) and -std=c++0x, there are several narrowing conversion
 errors in operator<
 if int_type is different from int, for example, short int.
 Example:
 #include <boost/rational.hpp>
 int main() { return boost::rational<short int>() < boost::rational<short
 int>(); }
 Error output:
 /tmp/boost/boost/rational.hpp: In member function ‘bool
 boost::rational<IntType>::operator<(const boost::rational<IntType>&) const
 [with IntType = short int]’:
 /tmp/boost/boost/rational.hpp:393:39: error: narrowing conversion of
 ‘(((int)((const boost::rational<short int>*)this)->boost::rational<short
 int>::num) / ((int)((const boost::rational<short
 int>*)this)->boost::rational<short int>::den))’ from ‘int’ to
 ‘boost::rational<short int>::int_type {aka short int}’ inside { }
 [-fpermissive]
 /tmp/boost/boost/rational.hpp:393:39: error: narrowing conversion of
 ‘(((int)((const boost::rational<short int>*)this)->boost::rational<short
 int>::num) % ((int)((const boost::rational<short
 int>*)this)->boost::rational<short int>::den))’ from ‘int’ to
 ‘boost::rational<short int>::int_type {aka short int}’ inside { }
 [-fpermissive]
 ...

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/5855>
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