Stan Math Library  2.12.0
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 
10 
11 namespace stan {
12  namespace math {
13 
14  namespace {
15  template <typename T_y, bool is_vec>
16  struct not_nan {
17  static bool check(const char* function,
18  const char* name,
19  const T_y& y) {
20  if (is_nan(value_of_rec(y)))
21  domain_error(function, name, y,
22  "is ", ", but must not be nan!");
23  return true;
24  }
25  };
26 
27  template <typename T_y>
28  struct not_nan<T_y, true> {
29  static bool check(const char* function,
30  const char* name,
31  const T_y& y) {
32  for (size_t n = 0; n < stan::length(y); n++) {
33  if (is_nan(value_of_rec(stan::get(y, n))))
34  domain_error_vec(function, name, y, n,
35  "is ", ", but must not be nan!");
36  }
37  return true;
38  }
39  };
40  }
41 
59  template <typename T_y>
60  inline bool check_not_nan(const char* function,
61  const char* name,
62  const T_y& y) {
63  return not_nan<T_y, is_vector_like<T_y>::value>
64  ::check(function, name, y);
65  }
66 
67  }
68 }
69 #endif
bool check_not_nan(const char *function, const char *name, const T_y &y)
Return true if y is not NaN.
double value_of_rec(const fvar< T > &v)
Return the value of the specified variable.
size_t length(const std::vector< T > &x)
Definition: length.hpp:10
void domain_error_vec(const char *function, const char *name, const T &y, const size_t i, const char *msg1, const char *msg2)
Throw a domain error with a consistently formatted message.
T get(const std::vector< T > &x, size_t n)
Definition: get.hpp:10
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's value is NaN and 0 otherwise.
Definition: is_nan.hpp:21

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