// Copyright John Maddock 2007. // Use, modification and distribution are subject to the // Boost Software License, Version 1.0. (See accompanying file // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // Note that this file contains quickbook mark-up as well as code // and comments, don't change any of the special comment mark-ups! //[policy_ref_snip12 #include <boost/math/special_functions/gamma.hpp> namespace myspace{ using namespace boost::math::policies; // Define a policy that does not throw on overflow: typedef policy<overflow_error<errno_on_error> > my_policy; // Define the special functions in this scope to use the policy: BOOST_MATH_DECLARE_SPECIAL_FUNCTIONS(my_policy) } // // Now we can use myspace::tgamma etc. // They will automatically use "my_policy": // double t = myspace::tgamma(30.0); // will not throw on overflow //] #include <iostream> int main() { std::cout << t << std::endl; }