1 #ifndef STAN_MATH_REV_SCAL_FUN_AS_BOOL_HPP
2 #define STAN_MATH_REV_SCAL_FUN_AS_BOOL_HPP
bool as_bool(const T x)
Return 1 if the argument is unequal to zero and 0 otherwise.
Independent (input) and dependent (output) variables for gradients.
const double val_
The value of this variable.
vari * vi_
Pointer to the implementation of this variable.