is_plain_type.hpp

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#ifndef STAN_MATH_PRIM_META_IS_PLAIN_TYPE_HPP
#define STAN_MATH_PRIM_META_IS_PLAIN_TYPE_HPP
 
#include <stan/math/prim/meta/require_helpers.hpp>
#include <stan/math/prim/meta/plain_type.hpp>
#include <type_traits>
 
namespace stan {
template <typename S>
using is_plain_type = std::is_same<std::decay_t<S>, plain_type_t<S>>;
 
template <typename T>
using require_plain_type_t = require_t<is_plain_type<std::decay_t<T>>>;
 
template <typename T>
using require_not_plain_type_t = require_not_t<is_plain_type<std::decay_t<T>>>;
 
template <typename... Types>
using require_all_plain_type_t
    = require_all_t<is_plain_type<std::decay_t<Types>>...>;
 
template <typename... Types>
using require_any_not_plain_type_t
    = require_any_not_t<is_plain_type<std::decay_t<Types>>...>;
}  // namespace stan
#endif