static_select.hpp

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#ifndef STAN_MATH_PRIM_META_STATIC_SELECT_HPP
#define STAN_MATH_PRIM_META_STATIC_SELECT_HPP
 
#include <type_traits>
#include <utility>
 
namespace stan {
namespace math {
 
template <bool Condition, typename T1, typename T2,
          std::enable_if_t<Condition>* = nullptr>
inline T1 static_select(T1&& a, T2&& b) {
  return std::forward<T1>(a);
}
 
template <bool Condition, typename T1, typename T2,
          std::enable_if_t<!Condition>* = nullptr>
inline T2 static_select(T1&& a, T2&& b) {
  return std::forward<T2>(b);
}
 
}  // namespace math
}  // namespace stan
 
#endif  // STATIC_SELECT_HPP