is_tuple.hpp

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#ifndef STAN_MATH_PRIM_META_IS_TUPLE_HPP
#define STAN_MATH_PRIM_META_IS_TUPLE_HPP
 
#include <stan/math/prim/meta/require_helpers.hpp>
#include <tuple>
#include <type_traits>
 
namespace stan {
namespace math {
namespace internal {
 
template <typename... Types>
struct is_tuple_impl : std::false_type {};
 
template <typename... Types>
struct is_tuple_impl<std::tuple<Types...>> : std::true_type {};
}  // namespace internal
 
template <typename T>
struct is_tuple : internal::is_tuple_impl<std::decay_t<T>> {};
 
template <typename T>
using require_tuple_t = require_t<is_tuple<std::decay_t<T>>>;
 
template <typename T>
using require_not_tuple_t = require_not_t<is_tuple<std::decay_t<T>>>;
 
template <typename... Types>
using require_all_tuple_t = require_all_t<is_tuple<std::decay_t<Types>>...>;
 
template <typename... Types>
using require_all_not_tuple_t
    = require_all_not_t<is_tuple<std::decay_t<Types>>...>;
}  // namespace math
}  // namespace stan
 
#endif