Stan Math Library  2.20.0
reverse mode automatic differentiation
check_not_nan.hpp
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1 #ifndef STAN_MATH_PRIM_SCAL_ERR_CHECK_NOT_NAN_HPP
2 #define STAN_MATH_PRIM_SCAL_ERR_CHECK_NOT_NAN_HPP
3 
9 
10 namespace stan {
11 namespace math {
12 
13 namespace internal {
14 template <typename T_y, bool is_vec>
15 struct not_nan {
16  static void check(const char* function, const char* name, const T_y& y) {
17  if (is_nan(value_of_rec(y)))
18  domain_error(function, name, y, "is ", ", but must not be nan!");
19  }
20 };
21 
22 template <typename T_y>
23 struct not_nan<T_y, true> {
24  static void check(const char* function, const char* name, const T_y& y) {
25  for (size_t n = 0; n < stan::length(y); n++) {
26  if (is_nan(value_of_rec(stan::get(y, n))))
27  domain_error_vec(function, name, y, n, "is ", ", but must not be nan!");
28  }
29  }
30 };
31 } // namespace internal
32 
44 template <typename T_y>
45 inline void check_not_nan(const char* function, const char* name,
46  const T_y& y) {
48 }
49 
50 } // namespace math
51 } // namespace stan
52 #endif
double value_of_rec(const fvar< T > &v)
Return the value of the specified variable.
size_t length(const std::vector< T > &x)
Returns the length of the provided std::vector.
Definition: length.hpp:16
static void check(const char *function, const char *name, const T_y &y)
void domain_error_vec(const char *function, const char *name, const T &y, size_t i, const char *msg1, const char *msg2)
Throw a domain error with a consistently formatted message.
void check_not_nan(const char *function, const char *name, const T_y &y)
Check if y is not NaN.
static void check(const char *function, const char *name, const T_y &y)
T get(const std::vector< T > &x, size_t n)
Returns the n-th element of the provided std::vector.
Definition: get.hpp:16
void domain_error(const char *function, const char *name, const T &y, const char *msg1, const char *msg2)
Throw a domain error with a consistently formatted message.
int is_nan(const fvar< T > &x)
Returns 1 if the input&#39;s value is NaN and 0 otherwise.
Definition: is_nan.hpp:20

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