#pragma once
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#include <vector>
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#include <torch/csrc/WindowsTorchApiMacro.h>
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// A hook that's called on gradients
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namespace torch { namespace autograd {
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struct Variable;
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using variable_list = std::vector<Variable>;
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struct TORCH_API FunctionPreHook {
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virtual ~FunctionPreHook();
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virtual variable_list operator()(const variable_list& grads) = 0;
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};
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struct TORCH_API FunctionPostHook {
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virtual ~FunctionPostHook();
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virtual variable_list operator()(
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const variable_list& outputs /* grad_inputs */,
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const variable_list& inputs /* grad_outputs */) = 0;
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};
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}} // namespace torch::autograd
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