c10::optional -> std::optional in a few places (pytorch#144340)

r-barnes · pytorchmergebot · commit 3beb7006dd5a · 2025-01-07T21:09:39.000Z
Test Plan: Sandcastle Pull Request resolved: pytorch#144340 Approved by: https://github.com/malfet
diff --git a/torch/csrc/api/include/torch/nn/parallel/data_parallel.h b/torch/csrc/api/include/torch/nn/parallel/data_parallel.h
@@ -275,7 +275,7 @@ Tensor data_parallel(
     return module->forward(std::move(input)).to(*output_device);
   }
 
-  autograd::Scatter scatter(*devices, /*chunk_sizes=*/nullopt, dim);
+  autograd::Scatter scatter(*devices, /*chunk_sizes=*/std::nullopt, dim);
   auto scattered_inputs = fmap<Tensor>(scatter.apply({std::move(input)}));
   // Input tensor might not be big enough to scale across all available devices
   if (scattered_inputs.size() < devices->size()) {

Original file line number	Diff line number	Diff line change
`@@ -275,7 +275,7 @@ Tensor data_parallel(`
`275`	`275`	`return module->forward(std::move(input)).to(*output_device);`
`276`	`276`	`}`
`277`	`277`
`278`		`- autograd::Scatter scatter(devices, /chunk_sizes=*/nullopt, dim);`
	`278`	`+ autograd::Scatter scatter(devices, /chunk_sizes=*/std::nullopt, dim);`
`279`	`279`	`auto scattered_inputs = fmap<Tensor>(scatter.apply({std::move(input)}));`
`280`	`280`	`// Input tensor might not be big enough to scale across all available devices`
`281`	`281`	`if (scattered_inputs.size() < devices->size()) {`