id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12777	uniform_real_distribution fails to compile with result_type having explicit conversion constructor from float	b7.10110111@…	No-Maintainer	"Consider the following test program:

{{{
#include <random>
#include <boost/random/uniform_real_distribution.hpp>
#include <half.hpp>

template<typename Float>
void test()
{
    std::random_device rd;
    std::mt19937 mt(rd());
    boost::random::uniform_real_distribution<Float> rnd(Float(1),Float(10));
    rnd(mt);
}

int main()
{
    test<float>(); // this works
    test<half_float::half>();  // and this doesn't compile
}
}}}

It uses half.hpp from half.sourceforge.net. This type has a peculiar behavior with arithmetic involving types other than it: the variable converts implicitly to `float`, and then the explicit constructor half_float::half(float) prevents some code from compiling.
Namely, the code above doesn't compile due to the `return 2 * generate_uniform_real(...)` in generate_uniform_real(). I've seen there already exist explicit casts like for the arguments T(min_value / 2) and the like. I've been able to fix it locally with the attached patch."	Bugs	new	To Be Determined	random	Boost 1.63.0	Problem