check_positive.hpp

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#ifndef STAN_MATH_PRIM_ERR_CHECK_POSITIVE_HPP
#define STAN_MATH_PRIM_ERR_CHECK_POSITIVE_HPP
 
#include <stan/math/prim/meta.hpp>
#include <stan/math/prim/err/elementwise_check.hpp>
#include <stan/math/prim/err/invalid_argument.hpp>
#include <stan/math/prim/fun/get.hpp>
#include <stan/math/prim/fun/size.hpp>
#include <type_traits>
#include <string>
 
namespace stan {
namespace math {
 
template <typename T_y>
inline void check_positive(const char* function, const char* name,
                           const T_y& y) {
  elementwise_check([](double x) { return x > 0; }, function, name, y,
                    "positive");
}
 
inline void check_positive(const char* function, const char* name,
                           const char* expr, int size) {
  if (size <= 0) {
    [&]() STAN_COLD_PATH {
      std::stringstream msg;
      msg << "; dimension size expression = " << expr;
      std::string msg_str(msg.str());
      invalid_argument(function, name, size,
                       "must have a positive size, but is ", msg_str.c_str());
    }();
  }
}
 
}  // namespace math
}  // namespace stan
#endif