Boost C++ Libraries: Ticket #9811: boost/boost/chrono/duration.hpp:355:56: error: call to non-constexpr function 'static std::numeric_limits::_Ty std::numeric_limits::max()' /home/zosun/input_service/inputservices-core-service/other/boost/boost/chrono/duration.hpp: In static member function 'static constexpr double boost::chrono::detail::chrono_numeric_limits::lowest()':

component changed; owner set

Steven Watanabe — Fri, 28 Mar 2014 14:39:29 GMT

owner set to viboes
component None → chrono

description changed

viboes — Fri, 18 Apr 2014 18:46:18 GMT

description modified (diff)

description changed

viboes — Fri, 18 Apr 2014 18:46:52 GMT

description modified (diff)

viboes — Sat, 19 Apr 2014 07:02:31 GMT

The definition of

    template <>
    struct chrono_numeric_limits<float,true> {
        static BOOST_CHRONO_LIB_CONSTEXPR float lowest() BOOST_CHRONO_LIB_NOEXCEPT_OR_THROW
        {
            return -(std::numeric_limits<float>::max) ();
        }
    };

where

#if defined( BOOST_NO_CXX11_NUMERIC_LIMITS )
#define BOOST_CHRONO_LIB_CONSTEXPR
#elif defined(_LIBCPP_VERSION) &&  !defined(_LIBCPP_CONSTEXPR)
  #define BOOST_CHRONO_LIB_CONSTEXPR
#else
  #define BOOST_CHRONO_LIB_CONSTEXPR BOOST_CONSTEXPR
#endif

Please, could you tell me which macro is defined for the library that I can check so that BOOST_CHRONO_LIB_CONSTEXPR is defined as

  #define BOOST_CHRONO_LIB_CONSTEXPR

viboes — Sat, 19 Apr 2014 07:04:51 GMT

An alternative could be to define BOOST_CHRONO_LIB_CONSTEXPR if not already defined

#ifndef BOOST_CHRONO_LIB_CONSTEXPR
#if defined( BOOST_NO_CXX11_NUMERIC_LIMITS )
#define BOOST_CHRONO_LIB_CONSTEXPR
#elif defined(_LIBCPP_VERSION) &&  !defined(_LIBCPP_CONSTEXPR)
  #define BOOST_CHRONO_LIB_CONSTEXPR
#else
  #define BOOST_CHRONO_LIB_CONSTEXPR BOOST_CONSTEXPR
#endif
#endif

Now the user could define BOOST_CHRONO_LIB_CONSTEXPR if its c++ std library doesn't supports constexpr for numeric_limits. What do you think?

viboes — Sat, 19 Apr 2014 09:58:47 GMT

https://github.com/boostorg/chrono/commit/e84030154dfe3953b0ba396730291baa7d33c0e2

milestone changed

viboes — Sat, 19 Apr 2014 09:59:28 GMT

milestone To Be Determined → Boost 1.56.0

viboes — Sun, 27 Apr 2014 13:15:08 GMT

Does the possibility to define BOOST_CHRONO_LIB_CONSTEXPR satisfy you?

viboes — Sun, 27 Apr 2014 13:51:25 GMT

https://github.com/boostorg/chrono/commit/f66235d6b80838f7bf03118789af4b399cecd012

status changed; resolution set

viboes — Sun, 08 Jun 2014 10:21:41 GMT

status new → closed
resolution → fixed