Stan Math Library  2.20.0
reverse mode automatic differentiation
as_bool.hpp
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1 #ifndef STAN_MATH_REV_SCAL_FUN_AS_BOOL_HPP
2 #define STAN_MATH_REV_SCAL_FUN_AS_BOOL_HPP
3 
4 #include <stan/math/rev/meta.hpp>
5 #include <stan/math/rev/core.hpp>
6 
7 namespace stan {
8 namespace math {
9 
16 inline int as_bool(const var& v) { return 0.0 != v.vi_->val_; }
17 
18 } // namespace math
19 } // namespace stan
20 #endif
bool as_bool(const T &x)
Return true if the argument is not equal to zero (in the != operator sense) and false otherwise...
Definition: as_bool.hpp:17
Independent (input) and dependent (output) variables for gradients.
Definition: var.hpp:33
const double val_
The value of this variable.
Definition: vari.hpp:38
vari * vi_
Pointer to the implementation of this variable.
Definition: var.hpp:45

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