Stan Math Library  2.20.0
reverse mode automatic differentiation
is_nonpositive_integer.hpp
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1 #ifndef STAN_MATH_PRIM_SCAL_FUN_IS_NONPOSITIVE_INTEGER_HPP
2 #define STAN_MATH_PRIM_SCAL_FUN_IS_NONPOSITIVE_INTEGER_HPP
3 
5 #include <cmath>
6 
7 namespace stan {
8 namespace math {
9 
16 template <typename T>
17 inline bool is_nonpositive_integer(T x) {
18  return x <= 0.0 && floor(x) == x;
19 }
20 
21 } // namespace math
22 } // namespace stan
23 
24 #endif
bool is_nonpositive_integer(T x)
Returns true if the input is a nonpositive integer and false otherwise.
fvar< T > floor(const fvar< T > &x)
Definition: floor.hpp:12

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