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add generator_iterator

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rename fix random/random_iterator.hpp -> random/iterator.hpp
This commit is contained in:
bolero-MURAKAMI 2012-09-27 21:26:32 +09:00
parent ebadf4fa7c
commit f40ee0a2ff
8 changed files with 235 additions and 331 deletions
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62
sprout/random/iterator.hpp Normal file
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#ifndef SPROUT_RANDOM_ITERATOR_HPP
#define SPROUT_RANDOM_ITERATOR_HPP
#include <utility>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/iterator/generator_iterator.hpp>
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout {
namespace random {
//
// begin
//
template<
typename Engine, typename Distribution,
typename sprout::enabler_if<!std::is_integral<Distribution>::value>::tyep = sprout::enabler
>
inline SPROUT_CONSTEXPR auto
begin(
Engine const& engine, Distribution const& distribution,
typename sprout::generator_iterator<typename std::decay<decltype(distribution(engine))>::type>::difference_type count = -1
)
-> sprout::generator_iterator<typename std::decay<decltype(distribution(engine))>::type>
{
return sprout::generator_iterator<typename std::decay<decltype(distribution(engine))>::type>(distribution(engine), count);
}
template<typename Engine>
inline SPROUT_CONSTEXPR auto
begin(
Engine const& engine,
typename sprout::generator_iterator<typename std::decay<decltype(engine())>::type>::difference_type count = -1
)
-> sprout::generator_iterator<typename std::decay<decltype(engine())>::type>
{
return sprout::generator_iterator<typename std::decay<decltype(engine())>::type>(engine(), count);
}
//
// end
//
template<
typename Engine, typename Distribution,
typename sprout::enabler_if<!std::is_integral<Distribution>::value>::tyep = sprout::enabler
>
inline SPROUT_CONSTEXPR auto
end(Engine const& engine, Distribution const& distribution)
-> sprout::generator_iterator<typename std::decay<decltype(distribution(engine))>::type>
{
return sprout::generator_iterator<typename std::decay<decltype(distribution(engine))>::type>();
}
template<typename Engine>
inline SPROUT_CONSTEXPR auto
end(Engine const& engine)
-> sprout::generator_iterator<typename std::decay<decltype(engine())>::type>
{
return sprout::generator_iterator<typename std::decay<decltype(engine())>::type>();
}
} // namespace random
} // namespace sprout
#endif // #ifndef SPROUT_RANDOM_ITERATOR_HPP