inline bool check_consistent_sizes(const char* function,
const T1& x1,
const T2& x2,
const char* name1,
const char* name2,
T_result* result) {
return check_consistent_sizes(function,x1,x2,name1,name2,
result,default_policy());
}
/**
* Construct a precomputed vari with the specified value,
* operands, and gradients.
*
* @param[in] val The value of the variable.
* @param[in] vars Vector of operands.
* @param[in] gradients Vector of partial derivatives of value
* with respect to operands.
* @throws std::invalid_argument if the sizes of the vectors
* don't match.
*/
precomputed_gradients_vari(double val,
const std::vector<var>& vars,
const std::vector<double>& gradients)
: vari(val),
size_(vars.size()),
varis_(ChainableStack::memalloc_
.alloc_array<vari*>(vars.size())),
gradients_(ChainableStack::memalloc_
.alloc_array<double>(vars.size())) {
check_consistent_sizes("precomputed_gradients_vari",
"vars", vars, "gradients", gradients);
for (size_t i = 0; i < vars.size(); ++i)
varis_[i] = vars[i].vi_;
std::copy(gradients.begin(), gradients.end(), gradients_);
}
