to_int.hpp

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#ifndef STAN_MATH_PRIM_FUN_TO_INT_HPP
#define STAN_MATH_PRIM_FUN_TO_INT_HPP
 
#include <stan/math/prim/err/check_bounded.hpp>
#include <stan/math/prim/functor/apply_scalar_unary.hpp>
 
namespace stan {
namespace math {
 
template <typename T, require_integral_t<T>* = nullptr>
inline T to_int(T x) {
  return std::forward<T>(x);
}
 
template <typename T, require_floating_point_t<T>* = nullptr>
inline int to_int(T x) {
  static constexpr const char* function = "to_int";
  check_bounded(function, "x", x, std::numeric_limits<int>::min(),
                std::numeric_limits<int>::max());
  return static_cast<int>(x);
}
 
struct to_int_fun {
  template <typename T>
  static inline auto fun(const T& x) {
    return to_int(x);
  }
};
 
template <typename Container,
          require_std_vector_st<std::is_arithmetic, Container>* = nullptr>
inline auto to_int(const Container& x) {
  return apply_scalar_unary<to_int_fun, Container>::apply(x);
}
 
}  // namespace math
}  // namespace stan
 
#endif