RE: [Boost-Users] Re: error C2668: 'abs' : ambiguous call to overloaded function
After I move the line 'using std namespace', the error still occurs. The error occurs in file date_time/time_duration.hpp, line 66. min_type minutes() const { return std::abs(((ticks() / (60*rep_type::res_adjust())) % 60)); }
It seems like the abs function declared in boost/date_time/compiler_config. hpp will not be included due to the macro configuration. The relavant code snippet is: //boost/date_time/compiler_config.hpp //Work around compilers that don't have std::abs #if (__GNUC__ <= 3)|| (defined(BOOST_MSVC) && _MSC_VER <= 1200) # define BOOST_NO_LONG_LONG_ABS #endif #if defined(BOOST_NO_LONG_LONG_ABS) namespace std { template <typename T> // JDG [7/6/02 made a template] inline T abs(T x) { return x < 0 ? -x : x; } } #endif You might try altering this so that the function will be defined. Something like (line 22) #if (__GNUC__ <= 3)|| defined(BOOST_MSVC) should do the trick. The only thing is that past testing with newer versions of MSVC did not require this so I'm a bit suprised that this is needed. This will only work if the problem is that the compiler is trying to convert the underlying type boost::int64_t into a long or another type because it lacks a std::abs for this type. Jeff
Should I rebuild .lib file after altering? -- /*******************/ ×ÔÓÉ£šliberty£©ÎÞ·ÇŸÍÊÇÕâÑùÒ»ÖÖ³Ðŵ£ºÃ¿žöÈËœ«»áµÃµœÒ»ÖÖ±£ÕÏ£¬±£ÕÏÎÒÃÇ¿ÉÒÔÓë ÈšÍþ¡¢¶àÊý¡¢Á÷Ë׌°ÓßÂÛµÄÓ°ÏìÏ࿹ºâ¡£ /*******************/ "Jeff Garland" <jeff@crystalclearsoftware.com> ÐŽÈëÏûÏ¢ÐÂÎÅ :jUsT.aNoTheR.mEsSaGe.iD.10416929881593@crystalclearsoftware.com...
After I move the line 'using std namespace', the error still occurs. The error occurs in file date_time/time_duration.hpp, line 66. min_type minutes() const { return std::abs(((ticks() / (60*rep_type::res_adjust())) % 60)); }
It seems like the abs function declared in
boost/date_time/compiler_config.
hpp will not be included due to the macro configuration. The relavant code snippet is:
//boost/date_time/compiler_config.hpp //Work around compilers that don't have std::abs #if (__GNUC__ <= 3)|| (defined(BOOST_MSVC) && _MSC_VER <= 1200) # define BOOST_NO_LONG_LONG_ABS #endif
#if defined(BOOST_NO_LONG_LONG_ABS) namespace std { template <typename T> // JDG [7/6/02 made a template] inline T abs(T x) { return x < 0 ? -x : x; } } #endif
You might try altering this so that the function will be defined. Something like (line 22)
#if (__GNUC__ <= 3)|| defined(BOOST_MSVC)
should do the trick. The only thing is that past testing with newer versions of MSVC did not require this so I'm a bit suprised that this is needed. This will only work if the problem is that the compiler is trying to convert the underlying type boost::int64_t into a long or another type because it lacks a std::abs for this type.
Jeff
Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com>
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Thanks -- /*******************/ ×ÔÓÉ£šliberty£©ÎÞ·ÇŸÍÊÇÕâÑùÒ»ÖÖ³Ðŵ£ºÃ¿žöÈËœ«»áµÃµœÒ»ÖÖ±£ÕÏ£¬±£ÕÏÎÒÃÇ¿ÉÒÔÓë ÈšÍþ¡¢¶àÊý¡¢Á÷Ë׌°ÓßÂÛµÄÓ°ÏìÏ࿹ºâ¡£ /*******************/ "Jeff Garland" <jeff@crystalclearsoftware.com> ÐŽÈëÏûÏ¢ÐÂÎÅ :jUsT.aNoTheR.mEsSaGe.iD.10416929881593@crystalclearsoftware.com...
After I move the line 'using std namespace', the error still occurs. The error occurs in file date_time/time_duration.hpp, line 66. min_type minutes() const { return std::abs(((ticks() / (60*rep_type::res_adjust())) % 60)); }
It seems like the abs function declared in
boost/date_time/compiler_config.
hpp will not be included due to the macro configuration. The relavant code snippet is:
//boost/date_time/compiler_config.hpp //Work around compilers that don't have std::abs #if (__GNUC__ <= 3)|| (defined(BOOST_MSVC) && _MSC_VER <= 1200) # define BOOST_NO_LONG_LONG_ABS #endif
#if defined(BOOST_NO_LONG_LONG_ABS) namespace std { template <typename T> // JDG [7/6/02 made a template] inline T abs(T x) { return x < 0 ? -x : x; } } #endif
You might try altering this so that the function will be defined. Something like (line 22)
#if (__GNUC__ <= 3)|| defined(BOOST_MSVC)
should do the trick. The only thing is that past testing with newer versions of MSVC did not require this so I'm a bit suprised that this is needed. This will only work if the problem is that the compiler is trying to convert the underlying type boost::int64_t into a long or another type because it lacks a std::abs for this type.
Jeff
Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com>
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
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Jeff Garland