[LTC] Support torch.ones/zeros/arange ops (#2440)

build_tools/autogen_ltc_backend.py

@@ -467,7 +467,8 @@ class GenTorchMlirLTC:
             node_base="torch::lazy::TorchMlirNode",
             node_base_hdr=str(self.backend_path.joinpath("mlir_node.h")),
             tensor_class=self.tensor_class,
-            tensor_class_hdr="torch/csrc/lazy/core/tensor.h",
+            tensor_class_hdr="torch_mlir/csrc/base_lazy_backend/tensor.h",
+            create_aten_from_ltc_tensor="CreateFunctionalizedAtenFromLtcTensor",
             shape_inference_hdr=str(self.generated_path.joinpath("shape_inference.h")),
             lazy_ir_generator=GenMlirLazyIr,
         )

build_tools/autogen_ltc_backend.yaml

@@ -3,12 +3,6 @@ blacklist:
 # It also doesn't have confusing `unsafe` argument.
 - _index_put_impl
 
-# Ops with list of tensors output
-- split.Tensor
-- split_with_sizes
-- unbind.int
-- chunk
-
 # Additional ops which autogen is supported for but don't compile yet
 - _convolution
 - detach
@@ -18,42 +12,28 @@ blacklist:
 
 # Disabled for consistency with TS backend
 - lift_fresh_copy
-- new_empty
 - rsub
-- slice.Tensor  # Disabled in favour of slice_copy.Tensor
-- zeros
-- ones
-- arange
-- arange.start
-- arange.start_step
-- fill.Scalar
-- scalar_tensor
 
 # Disabled in favour of functionalized alternatives
 - _reshape_alias
-- expand
 - permute
 - select.int
-- squeeze
 - squeeze.dim
-- t
 - transpose.int
+- expand
+- squeeze
 - unsqueeze
 - view
+- slice.Tensor
+- split.Tensor
+- split_with_sizes
+- unbind.int
 
-whitelist:
-# Enabled for consistency with TS backend
-- arange.start_out
 
 # List of supported ops that we don't want to do the full codegen for
 supported:
-# - bernoulli
-# - bernoulli_
 - _to_copy
 - clone
-- empty.memory_format
-- empty_strided
-- fill_.Scalar
 - _unsafe_view
 - unbind_copy.int
 - split_copy.Tensor
@@ -80,10 +60,10 @@ supported:
 - _trilinear
 - linalg_pinv.atol_rtol_tensor
 - logsumexp.out
+- t
 
 # List of ops that will take in symints for the size instead of ints
 symint:
-- empty.memory_format
 - new_empty_strided
 - expand_copy
 - narrow_copy
@@ -91,7 +71,6 @@ symint:
 - slice_copy.Tensor
 - split_copy.Tensor
 - slice_scatter
-- view
 - view_copy
 - as_strided_copy
 - as_strided_scatter

e2e_testing/xfail_sets.py

@@ -1384,7 +1384,6 @@ LTC_XFAIL_SET = {
     "ConvolutionBackwardModule2DPadded_basic",
     "VarMeanCorrectionModule_basic",
     "VarMeanCorrectionNoneModule_basic",
-    "PrimsConvertElementTypeModule_basic",
     "ElementwisePreluModule_basic",
     "VarMeanBiasedModule_basic",
     "VarMeanUnbiasedModule_basic",

include/torch-mlir/Dialect/Torch/IR/GeneratedTorchOps.td

@@ -4490,6 +4490,56 @@ def Torch_AtenRandnLikeOp : Torch_Op<"aten.randn_like", [
   }];
 }
 
+def Torch_AtenRandomOp : Torch_Op<"aten.random", [
+    AllowsTypeRefinement,
+    HasValueSemantics,
+    ReadOnly
+  ]> {
+  let summary = "Generated op for `aten::random : (Tensor, Generator?) -> (Tensor)`";
+  let arguments = (ins
+    AnyTorchTensorType:$self,
+    AnyTorchOptionalGeneratorType:$generator
+  );
+  let results = (outs
+    AnyTorchTensorType:$result
+  );
+  let hasCustomAssemblyFormat = 1;
+  let extraClassDefinition = [{
+    ParseResult AtenRandomOp::parse(OpAsmParser &parser, OperationState &result) {
+      return parseDefaultTorchOp(parser, result, 2, 1);
+    }
+    void AtenRandomOp::print(OpAsmPrinter &printer) {
+      printDefaultTorchOp(printer, *this, 2, 1);
+    }
+  }];
+}
+
+def Torch_AtenRandomFromOp : Torch_Op<"aten.random.from", [
+    AllowsTypeRefinement,
+    HasValueSemantics,
+    ReadOnly
+  ]> {
+  let summary = "Generated op for `aten::random.from : (Tensor, int, int?, Generator?) -> (Tensor)`";
+  let arguments = (ins
+    AnyTorchTensorType:$self,
+    Torch_IntType:$from,
+    AnyTorchOptionalIntType:$to,
+    AnyTorchOptionalGeneratorType:$generator
+  );
+  let results = (outs
+    AnyTorchTensorType:$result
+  );
+  let hasCustomAssemblyFormat = 1;
+  let extraClassDefinition = [{
+    ParseResult AtenRandomFromOp::parse(OpAsmParser &parser, OperationState &result) {
+      return parseDefaultTorchOp(parser, result, 4, 1);
+    }
+    void AtenRandomFromOp::print(OpAsmPrinter &printer) {
+      printDefaultTorchOp(printer, *this, 4, 1);
+    }
+  }];
+}
+
 def Torch_AtenTriuOp : Torch_Op<"aten.triu", [
     AllowsTypeRefinement,
     HasValueSemantics,
@@ -8934,6 +8984,31 @@ def Torch_Aten_ReshapeAliasOp : Torch_Op<"aten._reshape_alias", [
   }];
 }
 
+def Torch_AtenResizeOp : Torch_Op<"aten.resize", [
+    AllowsTypeRefinement,
+    HasValueSemantics,
+    ReadOnly
+  ]> {
+  let summary = "Generated op for `aten::resize : (Tensor, int[], int?) -> (Tensor)`";
+  let arguments = (ins
+    AnyTorchTensorType:$self,
+    AnyTorchListOfTorchIntType:$size,
+    AnyTorchOptionalIntType:$memory_format
+  );
+  let results = (outs
+    AnyTorchTensorType:$result
+  );
+  let hasCustomAssemblyFormat = 1;
+  let extraClassDefinition = [{
+    ParseResult AtenResizeOp::parse(OpAsmParser &parser, OperationState &result) {
+      return parseDefaultTorchOp(parser, result, 3, 1);
+    }
+    void AtenResizeOp::print(OpAsmPrinter &printer) {
+      printDefaultTorchOp(printer, *this, 3, 1);
+    }
+  }];
+}
+
 def Torch_AtenResize_Op : Torch_Op<"aten.resize_", [
     AllowsTypeRefinement
   ]> {

python/torch_mlir/csrc/base_lazy_backend/CMakeLists.txt

@@ -69,6 +69,7 @@ add_library(torch_mlir_ltc_backend SHARED
   backend_impl.cpp
   dynamic_ir.cpp
   mlir_node.cpp
+  tensor.cpp
   ops/device_data.cpp
   ops/generic.cpp
   ops/index.cpp

python/torch_mlir/csrc/base_lazy_backend/mlir_native_functions.cpp

@@ -30,6 +30,7 @@
 #include <torch/csrc/lazy/core/tensor_util.h>
 #include <torch/library.h>
 
+#include "generated/LazyIr.h"
 #include "generated/LazyNativeFunctions.h"
 #include "generated/shape_inference.h"
 #include "ops/to_copy.h"
@@ -143,32 +144,6 @@ void copy_(torch::lazy::LazyTensorPtr& input, torch::lazy::LazyTensorPtr& src) {
 
 } // namespace
 
-// at::Tensor LazyNativeFunctions::bernoulli(
-//     const at::Tensor& self, c10::optional<at::Generator> generator) {
-//   TORCH_LAZY_FN_COUNTER("lazy::");
-//   if (generator.has_value() && generator->defined()) {
-//     UNSUPPORTED_ERROR("LazyNativeFunctions::bernoulli has generator value");
-//   }
-//   auto self_tensor = torch::lazy::TryGetLtcTensor(self);
-
-//   UNIMPLEMENTED_FUNCTION_ERROR();
-//   // return torch::lazy::CreateAtenFromLtcTensor(
-//   //     torch::lazy::bernoulli(self_tensor));
-// }
-
-// at::Tensor& LazyNativeFunctions::bernoulli_(
-//     at::Tensor& self, double p, c10::optional<at::Generator> generator) {
-//   TORCH_LAZY_FN_COUNTER("lazy::");
-//   if (generator.has_value() && generator->defined()) {
-//     UNSUPPORTED_ERROR("LazyNativeFunctions::bernoulli_ has generator value");
-//   }
-//   auto self_tensor = torch::lazy::TryGetLtcTensor(self);
-
-//   UNIMPLEMENTED_FUNCTION_ERROR();
-//   // torch::lazy::bernoulli_(self_tensor, p);
-//   // return self;
-// }
-
 // clone is special in LT because we make it a no-op.
 // This should be safe to do, because every operator in the LT is functional.
 at::Tensor LazyNativeFunctions::clone(
@@ -352,64 +327,17 @@ at::Tensor LazyNativeFunctions::_to_copy(
   }
 };
 
-at::Tensor LazyNativeFunctions::empty_symint(
-    at::SymIntArrayRef sym_size,
-    c10::optional<at::ScalarType> dtype,
-    c10::optional<at::Layout> layout,
-    c10::optional<at::Device> device,
-    c10::optional<bool> pin_memory,
-    c10::optional<at::MemoryFormat> memory_format) {
-  // TODO: support this directly
-  auto size = C10_AS_INTARRAYREF_SLOW(sym_size);
-  const auto device_type = torch::lazy::getBackend()->EagerFallbackDeviceType();
-  at::TensorOptions options = at::TensorOptions()
-                                  .device(c10::Device(device_type))
-                                  .layout(layout)
-                                  .pinned_memory(pin_memory)
-                                  .dtype(dtype);
-  auto x_result = at::empty(size, options, memory_format);
-  auto tensor = CreateLtcTensor(x_result, GetLtcDevice(device));
-  // See Note [Lazy Tensor Functionalization]
-  if (c10::impl::tls_local_dispatch_key_set().excluded_.has(
-          c10::DispatchKey::Functionalize)) {
-    // Invariant: if the functionalization key is in the exclude set, then we're expected
-    // to return an ordinary tensor, which will be "lifted" into a functional wrapper later.
-    return tensor;
-  } else {
-    auto wrapped = at::functionalization::impl::to_functional_tensor(tensor);
-    return wrapped;
-  }
-}
-
-at::Tensor LazyNativeFunctions::empty_strided(
-    at::IntArrayRef size, at::IntArrayRef stride,
-    c10::optional<at::ScalarType> dtype, c10::optional<at::Layout> layout,
-    c10::optional<at::Device> device, c10::optional<bool> pin_memory) {
-  TORCH_LAZY_FN_COUNTER("lazy::");
-  at::Tensor t = empty_symint(
-    c10::fromIntArrayRefSlow(size),
-    dtype, layout, device, pin_memory, c10::nullopt);
-  return t.as_strided(size, stride, /*storage_offset=*/0);
-}
-
-at::Tensor&
-LazyNativeFunctions::fill_(at::Tensor& self, const at::Scalar& value) {
-  TORCH_LAZY_FN_COUNTER("lazy::");
-  auto self_tensor = torch::lazy::TryGetLtcTensor(self);
-
-  torch::lazy::Value constant =
-      torch::lazy::LazyGraphExecutor::Get()->GetIrValueForExpandedScalar(
-          value, self_tensor->shape(), self_tensor->GetDevice());
-  self_tensor->SetInPlaceIrValue(std::move(constant));
-  return self;
-}
-
 at::Tensor LazyNativeFunctions::_unsafe_view(
     const at::Tensor& self, at::IntArrayRef size) {
   TORCH_LAZY_FN_COUNTER("lazy::");
   return LazyNativeFunctions::view_copy_symint(self, c10::fromIntArrayRefSlow(size));
 }
 
+at::Tensor LazyNativeFunctions::t(const at::Tensor& self) {
+  TORCH_LAZY_FN_COUNTER("lazy::");
+  return at::functionalization::functionalize_aten_op<ATEN_OP(t)>::call(self);
+}
+
 std::vector<at::Tensor> LazyNativeFunctions::unbind_copy(const at::Tensor & self, int64_t dim) {
   TORCH_LAZY_FN_COUNTER("lazy::");
   auto common_device = torch::lazy::GetBackendDevice(self);
@@ -643,9 +571,18 @@ at::Tensor LazyNativeFunctions::new_empty_strided_symint(
     c10::optional<at::Layout> layout,
     c10::optional<at::Device> device,
     c10::optional<bool> pin_memory) {
-  return at::functionalization::
-      functionalize_aten_op_symint<ATEN_OP(new_empty_strided)>::call(
-          self, size, stride, dtype, layout, device, pin_memory);
+  if (!device || device->type() == c10::DeviceType::Lazy) {
+    return at::functionalization::functionalize_aten_op_symint<
+        ATEN_OP(new_empty_strided)>::call(self, size, stride, dtype, layout,
+                                          device, pin_memory);
+  }
+  // For cases when device != lazy, for example: lazy_tensor.new_empty_strided(..., "cpu")
+  // we need to avoid explicit functionalization. To do that we create regular cpu tensors.
+  at::Tensor t = at::empty_symint(
+      size, (dtype ? dtype : c10::optional<at::ScalarType>(self.scalar_type())),
+      (layout ? layout : c10::optional<at::Layout>(self.layout())), device,
+      pin_memory, c10::nullopt);
+  return t.as_strided_symint(size, stride, /*storage_offset=*/0);
 }
 
 at::Tensor LazyNativeFunctions::narrow_copy_symint(

python/torch_mlir/csrc/base_lazy_backend/shape_inference.cpp

@@ -265,6 +265,33 @@ std::vector<torch::lazy::Shape> compute_shape_eye(
   return {Shape(out_meta.scalar_type(), out_meta.sizes().vec())};
 }
 
+std::vector<torch::lazy::Shape> compute_shape_arange(
+    const at::Scalar& end, c10::optional<at::ScalarType> dtype,
+    c10::optional<at::Layout> layout, c10::optional<at::Device> device,
+    c10::optional<bool> pin_memory) {
+  auto out_meta =
+      at::arange(end, dtype, layout, c10::Device(c10::kMeta), pin_memory);
+  return {Shape(out_meta.scalar_type(), out_meta.sizes().vec())};
+}
+
+std::vector<torch::lazy::Shape> compute_shape_arange(
+    const at::Scalar& start, const at::Scalar& end,
+    c10::optional<at::ScalarType> dtype, c10::optional<at::Layout> layout,
+    c10::optional<at::Device> device, c10::optional<bool> pin_memory) {
+  auto out_meta = at::arange(start, end, dtype, layout, c10::Device(c10::kMeta),
+                             pin_memory);
+  return {Shape(out_meta.scalar_type(), out_meta.sizes().vec())};
+}
+
+std::vector<torch::lazy::Shape> compute_shape_arange(
+    const at::Scalar& start, const at::Scalar& end, const at::Scalar& step,
+    c10::optional<at::ScalarType> dtype, c10::optional<at::Layout> layout,
+    c10::optional<at::Device> device, c10::optional<bool> pin_memory) {
+  auto out_meta = at::arange(start, end, step, dtype, layout,
+                             c10::Device(c10::kMeta), pin_memory);
+  return {Shape(out_meta.scalar_type(), out_meta.sizes().vec())};
+}
+
 std::vector<torch::lazy::Shape> compute_shape_full(
     at::IntArrayRef size, const at::Scalar& fill_value,
     c10::optional<at::ScalarType> dtype, c10::optional<at::Layout> layout,
@@ -273,6 +300,44 @@ std::vector<torch::lazy::Shape> compute_shape_full(
       Shape(dtype.value_or(at::get_default_dtype_as_scalartype()), size.vec())};
 }
 
+std::vector<torch::lazy::Shape> compute_shape_ones(
+    at::IntArrayRef size, c10::optional<at::ScalarType> dtype,
+    c10::optional<at::Layout> layout, c10::optional<at::Device> device,
+    c10::optional<bool> pin_memory) {
+  return {
+      Shape(dtype.value_or(at::get_default_dtype_as_scalartype()), size.vec())};
+}
+
+std::vector<torch::lazy::Shape> compute_shape_zeros(
+    at::IntArrayRef size, c10::optional<at::ScalarType> dtype,
+    c10::optional<at::Layout> layout, c10::optional<at::Device> device,
+    c10::optional<bool> pin_memory) {
+  return {
+      Shape(dtype.value_or(at::get_default_dtype_as_scalartype()), size.vec())};
+}
+
+std::vector<torch::lazy::Shape> compute_shape_empty(
+    at::IntArrayRef size, c10::optional<at::ScalarType> dtype,
+    c10::optional<at::Layout> layout, c10::optional<at::Device> device,
+    c10::optional<bool> pin_memory,
+    c10::optional<at::MemoryFormat> memory_format) {
+  return {
+      Shape(dtype.value_or(at::get_default_dtype_as_scalartype()), size.vec())};
+}
+
+std::vector<torch::lazy::Shape> compute_shape_empty_strided(
+    at::IntArrayRef size, at::IntArrayRef stride,
+    c10::optional<at::ScalarType> dtype, c10::optional<at::Layout> layout,
+    c10::optional<at::Device> device, c10::optional<bool> pin_memory) {
+  return {
+      Shape(dtype.value_or(at::get_default_dtype_as_scalartype()), size.vec())};
+}
+
+std::vector<torch::lazy::Shape> compute_shape_fill(const at::Tensor& self,
+                                                   const at::Scalar& value) {
+  return {Shape(self.scalar_type(), self.sizes().vec())};
+}
+
 std::vector<torch::lazy::Shape> compute_shape_fill(const at::Tensor& self,
                                                    const at::Tensor& value) {
   return {Shape(self.scalar_type(), self.sizes().vec())};
@@ -302,11 +367,24 @@ std::vector<torch::lazy::Shape> compute_shape_randint(
       Shape(dtype.value_or(at::get_default_dtype_as_scalartype()), size.vec())};
 }
 
+std::vector<torch::lazy::Shape> compute_shape_resize(
+    const at::Tensor & self, at::IntArrayRef size,
+    c10::optional<at::MemoryFormat> memory_format) {
+  return {Shape(self.scalar_type(), size.vec())};
+}
+
 std::vector<torch::lazy::Shape> compute_shape_bernoulli(
     const at::Tensor& self, const at::Tensor &p,
     c10::optional<at::Generator> generator) {
   return {Shape(self.scalar_type(), self.sizes().vec())};
 }
 
+std::vector<torch::lazy::Shape> compute_shape_scalar_tensor(
+    const at::Scalar & s, c10::optional<at::ScalarType> dtype,
+    c10::optional<at::Layout> layout, c10::optional<at::Device> device,
+    c10::optional<bool> pin_memory) {
+  return {Shape(dtype.value_or(s.type()), c10::ArrayRef<int64_t>{})};
+}
+
 }  // namespace lazy
 }  // namespace torch

python/torch_mlir/csrc/base_lazy_backend/tensor.cpp

@@ -0,0 +1,29 @@
+//===- tensor.cpp ---------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+// Also available under a BSD-style license. See LICENSE.
+//
+//===----------------------------------------------------------------------===//
+
+#include <ATen/FunctionalTensorWrapper.h>
+
+#include "tensor.h"
+
+namespace torch {
+namespace lazy {
+
+at::Tensor CreateFunctionalizedAtenFromLtcTensor(
+    const LazyTensorPtr& ltc_tensor) {
+  at::Tensor tensor = CreateAtenFromLtcTensor(ltc_tensor);
+  if (!c10::impl::tls_is_dispatch_key_excluded(
+           c10::DispatchKey::Functionalize) &&
+      !at::functionalization::impl::isFunctionalTensor(tensor)) {
+    return at::functionalization::impl::to_functional_tensor(tensor);
+  }
+  return tensor;
+}
+
+}  // namespace lazy
+}  // namespace torch

python/torch_mlir/csrc/base_lazy_backend/tensor.h

@@ -0,0 +1,24 @@
+//===- tensor.h -----------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+// Also available under a BSD-style license. See LICENSE.
+//
+//===----------------------------------------------------------------------===//
+
+#pragma once
+
+#include <torch/csrc/lazy/core/tensor.h>
+
+namespace torch {
+namespace lazy {
+
+// Ops like torch.ones/zeros etc. which produce new tensor as an output
+// should have explicit tensor functinoalization. Otherwise we can get
+// unfanctionalized primitives or in the worst case if we apply inplace
+// operations to unfunctionalized tensor it won't be captured in LTC graph.
+TORCH_API at::Tensor CreateFunctionalizedAtenFromLtcTensor(const LazyTensorPtr& ltc_tensor);
+
+} // namespace lazy
+} // namespace torch

python/torch_mlir/csrc/reference_lazy_backend/backend_impl.cpp

@@ -28,6 +28,11 @@ using namespace torch::lazy;
 namespace torch {
 namespace lazy {
 
+/// Returns true if a string begins with another.
+inline bool beginswith(const std::string& s, const std::string& t) {
+    return s.size() >= t.size() && s.compare(0, t.size(), t) == 0;
+}
+
 struct ReferenceLazyBackendDeviceType : public BackendDeviceType {
   ReferenceLazyBackendDeviceType(c10::DeviceType device_type)
       : device_type_(device_type) {}
@@ -104,7 +109,25 @@ public:
     //
     // JIT Execution adopted from:
     // https://github.com/pytorch/pytorch/blob/master/torch/csrc/lazy/ts_backend/ts_backend_impl.cpp
-    torch::jit::GraphExecutor graph_executor(mlir_computation->graph(), "");
+    std::shared_ptr<torch::jit::Graph> graph = mlir_computation->graph();
+    for (auto* node : graph->nodes()) {
+      // Convert any lazy devices to cpu devices to ensure
+      // that the values are actually computed
+      if (node->outputs().size() == 1 &&
+          node->output()->type()->kind() ==
+              c10::TypeKind::DeviceObjType) {
+          auto value_sym = torch::jit::Symbol::attr("value");
+          TORCH_CHECK(node->hasAttribute(value_sym),
+                      "Expected node to have 'value' attribute.");
+          TORCH_CHECK(node->kindOf(value_sym) == torch::jit::AttributeKind::s,
+                      "Expected 'value' attribute to be a string.");
+          if (beginswith(node->s(value_sym), "lazy")) {
+              node->s_(value_sym, "cpu");
+          }
+      }
+    }
+
+    torch::jit::GraphExecutor graph_executor(graph, "");
     std::vector<torch::jit::IValue> stack;
     for (const auto& argument : arguments) {
       const auto mlir_data =

python/torch_mlir/dialects/torch/importer/jit_ir/build_tools/torch_ods_gen.py

@@ -359,6 +359,8 @@ def emit_ops(emitter_td: TextEmitter, registry: Registry):
     emit("aten::randn : (int[], int?, int?, Device?, bool?) -> (Tensor)")
     emit("aten::randn.generator : (int[], Generator?, int?, int?, Device?, bool?) -> (Tensor)")
     emit("aten::randn_like : (Tensor, int?, int?, Device?, bool?, int?) -> (Tensor)")
+    emit("aten::random : (Tensor, Generator?) -> (Tensor)")
+    emit("aten::random.from : (Tensor, int, int?, Generator?) -> (Tensor)")
 
     emit_with_mutating_variants("aten::triu : (Tensor, int) -> (Tensor)")
     emit_with_mutating_variants("aten::tril : (Tensor, int) -> (Tensor)")
@@ -571,6 +573,7 @@ def emit_ops(emitter_td: TextEmitter, registry: Registry):
     emit("aten::tile : (Tensor, int[]) -> (Tensor)")
     emit("aten::reshape : (Tensor, int[]) -> (Tensor)")
     emit("aten::_reshape_alias : (Tensor, int[], int[]) -> (Tensor)")
+    emit("aten::resize : (Tensor, int[], int?) -> (Tensor)")
     emit("aten::resize_ : (Tensor, int[], int?) -> (Tensor)")
     emit("aten::select.int : (Tensor, int, int) -> (Tensor)")
     emit("aten::size.int : (Tensor, int) -> (int)", has_folder=True)