set_zero_all_adjoints_nested.hpp
Go to the documentation of this file.
#ifndef STAN_MATH_REV_CORE_SET_ZERO_ALL_ADJOINTS_NESTED_HPP
#define STAN_MATH_REV_CORE_SET_ZERO_ALL_ADJOINTS_NESTED_HPP
#include <stan/math/rev/core/vari.hpp>
#include <stan/math/rev/core/chainable_alloc.hpp>
#include <stan/math/rev/core/chainablestack.hpp>
#include <stan/math/rev/core/empty_nested.hpp>
#include <stdexcept>
namespace stan {
namespace math {
static void set_zero_all_adjoints_nested() {
if (empty_nested())
throw std::logic_error("empty_nested() must be false before calling"
" set_zero_all_adjoints_nested()");
size_t start1 = ChainableStack::nested_var_stack_sizes_.back();
// avoid wrap with unsigned when start1 == 0
for (size_t i = (start1 == 0U) ? 0U : (start1 - 1);
i < ChainableStack::var_stack_.size(); ++i)
ChainableStack::var_stack_[i]->set_zero_adjoint();
size_t start2 = ChainableStack::nested_var_nochain_stack_sizes_.back();
for (size_t i = (start2 == 0U) ? 0U : (start2 - 1);
i < ChainableStack::var_nochain_stack_.size(); ++i) {
ChainableStack::var_nochain_stack_[i]->set_zero_adjoint();
}
}
}
}
#endif
stan::math::empty_nested
static bool empty_nested()
Return true if there is no nested autodiff being executed.
Definition: empty_nested.hpp:12
vari.hpp
stan
Definition: log_sum_exp.hpp:8
stan::math::set_zero_all_adjoints_nested
static void set_zero_all_adjoints_nested()
Reset all adjoint values in the top nested portion of the stack to zero.
Definition: set_zero_all_adjoints_nested.hpp:17
empty_nested.hpp
stan::math::AutodiffStackStorage::var_nochain_stack_
static std::vector< ChainableT * > var_nochain_stack_
Definition: autodiffstackstorage.hpp:14
stan::math::AutodiffStackStorage::nested_var_nochain_stack_sizes_
static std::vector< size_t > nested_var_nochain_stack_sizes_
Definition: autodiffstackstorage.hpp:20
chainable_alloc.hpp
stan::math::AutodiffStackStorage::nested_var_stack_sizes_
static std::vector< size_t > nested_var_stack_sizes_
Definition: autodiffstackstorage.hpp:19
chainablestack.hpp
stan::math::AutodiffStackStorage::var_stack_
static std::vector< ChainableT * > var_stack_
Definition: autodiffstackstorage.hpp:13

[ Stan Home Page ] © 2011–2016, Stan Development Team.