Hi, Gordon.
On Aug 17, 2012, at 5:35 AM, "Alexander Stoyan" <alexander.stoyan@gmail.com> wrote: I have a need for pseudorandom numbers at compile time to test compile-time graph algorithms; however I guess a template metaprogram rather than preprocessor metaprogram is sufficient for what I'm trying to do.
If you need the compile-time pseudo-random numbers (rather than preprocess-time), constexpr is good for you want to do. Sprout.Random library provides a constexpr pseudo-random numbers and probability distributions. https://github.com/bolero-MURAKAMI/Sprout/tree/master/sprout/random For example: #include <sprout/random.hpp> using namespace sprout; constexpr auto prng = minstd_rand0(SPROUT_UNIQUE_SEED); constexpr auto dist = uniform_smallint<int>(1, 6); constexpr auto n0 = dist(prng); // returns pair of generated number and next generator. constexpr auto n1 = n0(); // call new generator. constexpr auto n2 = n1(); // call new generator. /*...*/ constexpr int v[] = { n0.result(), n1.result(), n2.result() /*, ...*/ }; You can also make a list of pseudo-random numbers in this way. :) #include <sprout/array.hpp> #include <sprout/algorithm.hpp> constexpr auto v2 = sprout::copy( random::begin(prng, dist), random::end(prng, dist), array<int, N>{{}} ); (I tested this on gcc4.7.1) I'm sorry if my English is hard to understand. Best regards.