Use C++17 nested namespaces instead of manually nesting them.

This was done with these two commands and a couple manual fixups for
namespaces that had more than one space in the comment in the closing
brace, as well as vulkan_platform.h

git grep -l "namespace .* { namespace " | xargs sed -i "" "s/namespace \(.*\) { namespace /namespace \1::/"
git grep -l "}}  // namespace" | xargs sed -i "" "s%}}  // namespace%}  // namespace%"

Bug: dawn:824
Change-Id: I6f448b820c12fc1004ea5270bf8e1f466b0c0aab
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/75400
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Loko Kung <lokokung@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

.clang-format

@@ -10,7 +10,6 @@ IndentWidth: 4
 ObjCBlockIndentWidth: 4
 AccessModifierOffset: -2
 
-# Nested namespaces are C++17, fake them by compacting namespaces for now.
 CompactNamespaces: true
 
 # This should result in only one indentation level with compacted namespaces

generator/templates/dawn_wire/client/ApiObjects.h

@@ -18,7 +18,7 @@
 #include "dawn_wire/ObjectType_autogen.h"
 #include "dawn_wire/client/ObjectBase.h"
 
-namespace dawn_wire { namespace client {
+namespace dawn_wire::client {
 
     template <typename T>
     struct ObjectTypeToTypeEnum {
@@ -48,6 +48,6 @@ namespace dawn_wire { namespace client {
         };
 
     {% endfor %}
-}}  // namespace dawn_wire::client
+}  // namespace dawn_wire::client
 
 #endif  // DAWNWIRE_CLIENT_APIOBJECTS_AUTOGEN_H_

generator/templates/dawn_wire/client/ApiProcs.cpp

@@ -21,7 +21,7 @@
 #include <string>
 #include <vector>
 
-namespace dawn_wire { namespace client {
+namespace dawn_wire::client {
 
     //* Outputs an rvalue that's the number of elements a pointer member points to.
     {% macro member_length(member, accessor) -%}
@@ -175,4 +175,4 @@ namespace dawn_wire { namespace client {
     const {{Prefix}}ProcTable& GetProcs() {
         return gProcTable;
     }
-}}  // namespace dawn_wire::client
+}  // namespace dawn_wire::client

generator/templates/dawn_wire/client/ClientBase.h

@@ -20,7 +20,7 @@
 #include "dawn_wire/client/ApiObjects.h"
 #include "dawn_wire/client/ObjectAllocator.h"
 
-namespace dawn_wire { namespace client {
+namespace dawn_wire::client {
 
     class ClientBase : public ChunkedCommandHandler, public ObjectIdProvider {
       public:
@@ -69,6 +69,6 @@ namespace dawn_wire { namespace client {
         {% endfor %}
     };
 
-}}  // namespace dawn_wire::client
+}  // namespace dawn_wire::client
 
 #endif  // DAWNWIRE_CLIENT_CLIENTBASE_AUTOGEN_H_

generator/templates/dawn_wire/client/ClientHandlers.cpp

@@ -17,7 +17,7 @@
 
 #include <string>
 
-namespace dawn_wire { namespace client {
+namespace dawn_wire::client {
     {% for command in cmd_records["return command"] %}
         bool Client::Handle{{command.name.CamelCase()}}(DeserializeBuffer* deserializeBuffer) {
             Return{{command.name.CamelCase()}}Cmd cmd;
@@ -94,4 +94,4 @@ namespace dawn_wire { namespace client {
 
         return commands;
     }
-}}  // namespace dawn_wire::client
+}  // namespace dawn_wire::client

generator/templates/dawn_wire/server/ServerBase.h

@@ -22,7 +22,7 @@
 #include "dawn_wire/WireDeserializeAllocator.h"
 #include "dawn_wire/server/ObjectStorage.h"
 
-namespace dawn_wire { namespace server {
+namespace dawn_wire::server {
 
     class ServerBase : public ChunkedCommandHandler, public ObjectIdResolver {
       public:
@@ -100,6 +100,6 @@ namespace dawn_wire { namespace server {
         {% endfor %}
     };
 
-}}  // namespace dawn_wire::server
+}  // namespace dawn_wire::server
 
 #endif  // DAWNWIRE_SERVER_SERVERBASE_H_

generator/templates/dawn_wire/server/ServerDoers.cpp

@@ -15,7 +15,7 @@
 #include "common/Assert.h"
 #include "dawn_wire/server/Server.h"
 
-namespace dawn_wire { namespace server {
+namespace dawn_wire::server {
     //* Implementation of the command doers
     {% for command in cmd_records["command"] %}
         {% set type = command.derived_object %}
@@ -118,4 +118,4 @@ namespace dawn_wire { namespace server {
         }
     }
 
-}}  // namespace dawn_wire::server
+}  // namespace dawn_wire::server

generator/templates/dawn_wire/server/ServerHandlers.cpp

@@ -15,7 +15,7 @@
 #include "common/Assert.h"
 #include "dawn_wire/server/Server.h"
 
-namespace dawn_wire { namespace server {
+namespace dawn_wire::server {
     {% for command in cmd_records["command"] %}
         {% set method = command.derived_method %}
         {% set is_method = method != None %}
@@ -147,4 +147,4 @@ namespace dawn_wire { namespace server {
         return commands;
     }
 
-}}  // namespace dawn_wire::server
+}  // namespace dawn_wire::server

generator/templates/opengl/OpenGLFunctionsBase.cpp

@@ -14,7 +14,7 @@
 
 #include "dawn_native/opengl/OpenGLFunctionsBase_autogen.h"
 
-namespace dawn_native { namespace opengl {
+namespace dawn_native::opengl {
 
 template<typename T>
 MaybeError OpenGLFunctionsBase::LoadProc(GetProcAddress getProc, T* memberProc, const char* name) {
@@ -67,4 +67,4 @@ MaybeError OpenGLFunctionsBase::LoadDesktopGLProcs(GetProcAddress getProc, int m
     return {};
 }
 
-}}  // namespace dawn_native::opengl
+}  // namespace dawn_native::opengl

generator/templates/opengl/OpenGLFunctionsBase.h

@@ -18,7 +18,7 @@
 #include "dawn_native/Error.h"
 #include "dawn_native/opengl/opengl_platform.h"
 
-namespace dawn_native { namespace opengl {
+namespace dawn_native::opengl {
     using GetProcAddress = void* (*) (const char*);
 
     struct OpenGLFunctionsBase {
@@ -40,6 +40,6 @@ namespace dawn_native { namespace opengl {
         MaybeError LoadProc(GetProcAddress getProc, T* memberProc, const char* name);
     };
 
-}}  // namespace dawn_native::opengl
+}  // namespace dawn_native::opengl
 
 #endif // DAWNNATIVE_OPENGL_OPENGLFUNCTIONSBASE_H_

src/common/vulkan_platform.h

@@ -65,7 +65,7 @@ DAWN_DEFINE_NATIVE_NON_DISPATCHABLE_HANDLE(VkSomeHandle)
 // One way to get the alignment inside structures of a type is to look at the alignment of it
 // wrapped in a structure. Hence VkSameHandleNativeWrappe
 
-namespace dawn_native { namespace vulkan {
+namespace dawn_native::vulkan {
 
     namespace detail {
         template <typename T>
@@ -140,17 +140,16 @@ namespace dawn_native { namespace vulkan {
         return reinterpret_cast<HandleType*>(handle);
     }
 
-}}  // namespace dawn_native::vulkan
+}  // namespace dawn_native::vulkan
 
 #define VK_DEFINE_NON_DISPATCHABLE_HANDLE(object)                                   \
     DAWN_DEFINE_NATIVE_NON_DISPATCHABLE_HANDLE(object)                              \
-    namespace dawn_native { namespace vulkan {                                      \
+    namespace dawn_native::vulkan {                                      \
         using object = detail::VkHandle<struct VkTag##object, ::object>;        \
         static_assert(sizeof(object) == sizeof(uint64_t), "");                  \
         static_assert(alignof(object) == detail::kUint64Alignment, "");         \
         static_assert(sizeof(object) == sizeof(::object), "");                  \
         static_assert(alignof(object) == detail::kNativeVkHandleAlignment, ""); \
-        }                                                                           \
     }  // namespace dawn_native::vulkan
 
 // Import additional parts of Vulkan that are supported on our architecture and preemptively include

src/dawn_native/CompilationMessages.h

@@ -22,10 +22,10 @@
 #include <string>
 #include <vector>
 
-namespace tint { namespace diag {
+namespace tint::diag {
     class Diagnostic;
     class List;
-}}  // namespace tint::diag
+}  // namespace tint::diag
 
 namespace dawn_native {
 

src/dawn_native/d3d12/AdapterD3D12.cpp

@@ -24,7 +24,7 @@
 
 #include <sstream>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     Adapter::Adapter(Backend* backend, ComPtr<IDXGIAdapter3> hardwareAdapter)
         : AdapterBase(backend->GetInstance(), wgpu::BackendType::D3D12),
@@ -412,4 +412,4 @@ namespace dawn_native { namespace d3d12 {
         return {};
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/AdapterD3D12.h

@@ -21,7 +21,7 @@
 #include "dawn_native/d3d12/D3D12Info.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Backend;
 
@@ -61,6 +61,6 @@ namespace dawn_native { namespace d3d12 {
         D3D12DeviceInfo mDeviceInfo = {};
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_ADAPTERD3D12_H_

src/dawn_native/d3d12/BackendD3D12.cpp

@@ -20,7 +20,7 @@
 #include "dawn_native/d3d12/D3D12Error.h"
 #include "dawn_native/d3d12/PlatformFunctions.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     namespace {
 
@@ -207,4 +207,4 @@ namespace dawn_native { namespace d3d12 {
         return backend;
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/BackendD3D12.h

@@ -19,7 +19,7 @@
 
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class PlatformFunctions;
 
@@ -54,6 +54,6 @@ namespace dawn_native { namespace d3d12 {
         ComPtr<IDxcValidator> mDxcValidator;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_BACKENDD3D12_H_

src/dawn_native/d3d12/BindGroupD3D12.cpp

@@ -23,7 +23,7 @@
 #include "dawn_native/d3d12/ShaderVisibleDescriptorAllocatorD3D12.h"
 #include "dawn_native/d3d12/TextureD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     // static
     ResultOrError<Ref<BindGroup>> BindGroup::Create(Device* device,
@@ -282,4 +282,4 @@ namespace dawn_native { namespace d3d12 {
         return mDynamicStorageBufferLengths;
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/BindGroupD3D12.h

@@ -22,7 +22,7 @@
 #include "dawn_native/d3d12/CPUDescriptorHeapAllocationD3D12.h"
 #include "dawn_native/d3d12/GPUDescriptorHeapAllocationD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
     class SamplerHeapCacheEntry;
@@ -63,6 +63,6 @@ namespace dawn_native { namespace d3d12 {
 
         DynamicStorageBufferLengths mDynamicStorageBufferLengths;
     };
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_BINDGROUPD3D12_H_

src/dawn_native/d3d12/BindGroupLayoutD3D12.cpp

@@ -20,7 +20,7 @@
 #include "dawn_native/d3d12/SamplerHeapCacheD3D12.h"
 #include "dawn_native/d3d12/StagingDescriptorAllocatorD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
     namespace {
         D3D12_DESCRIPTOR_RANGE_TYPE WGPUBindingInfoToDescriptorRangeType(
             const BindingInfo& bindingInfo) {
@@ -188,4 +188,4 @@ namespace dawn_native { namespace d3d12 {
         return mSamplerDescriptorRanges;
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/BindGroupLayoutD3D12.h

@@ -21,7 +21,7 @@
 #include "common/ityp_stack_vec.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class BindGroup;
     class CPUDescriptorHeapAllocation;
@@ -89,6 +89,6 @@ namespace dawn_native { namespace d3d12 {
         StagingDescriptorAllocator* mViewAllocator = nullptr;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_BINDGROUPLAYOUTD3D12_H_

src/dawn_native/d3d12/BufferD3D12.cpp

@@ -26,7 +26,7 @@
 #include "dawn_native/d3d12/ResidencyManagerD3D12.h"
 #include "dawn_native/d3d12/UtilsD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     namespace {
         D3D12_RESOURCE_FLAGS D3D12ResourceFlags(wgpu::BufferUsage usage) {
@@ -490,4 +490,4 @@ namespace dawn_native { namespace d3d12 {
 
         return {};
     }
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/BufferD3D12.h

@@ -20,7 +20,7 @@
 #include "dawn_native/d3d12/ResourceHeapAllocationD3D12.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class CommandRecordingContext;
     class Device;
@@ -86,6 +86,6 @@ namespace dawn_native { namespace d3d12 {
         void* mMappedData = nullptr;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_BUFFERD3D12_H_

src/dawn_native/d3d12/CPUDescriptorHeapAllocationD3D12.cpp

@@ -15,7 +15,7 @@
 #include "dawn_native/d3d12/CPUDescriptorHeapAllocationD3D12.h"
 #include "dawn_native/Error.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     CPUDescriptorHeapAllocation::CPUDescriptorHeapAllocation(
         D3D12_CPU_DESCRIPTOR_HANDLE baseDescriptor,
@@ -50,4 +50,4 @@ namespace dawn_native { namespace d3d12 {
         mBaseDescriptor = {0};
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/CPUDescriptorHeapAllocationD3D12.h

@@ -19,7 +19,7 @@
 
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     // Wrapper for a handle into a CPU-only descriptor heap.
     class CPUDescriptorHeapAllocation {
@@ -42,6 +42,6 @@ namespace dawn_native { namespace d3d12 {
         uint32_t mHeapIndex = -1;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_CPUDESCRIPTORHEAPALLOCATION_H_

src/dawn_native/d3d12/CommandAllocatorManager.cpp

@@ -20,7 +20,7 @@
 #include "common/Assert.h"
 #include "common/BitSetIterator.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     CommandAllocatorManager::CommandAllocatorManager(Device* device)
         : device(device), mAllocatorCount(0) {
@@ -69,4 +69,4 @@ namespace dawn_native { namespace d3d12 {
         return {};
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/CommandAllocatorManager.h

@@ -23,7 +23,7 @@
 
 #include <bitset>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -53,6 +53,6 @@ namespace dawn_native { namespace d3d12 {
         SerialQueue<ExecutionSerial, IndexedCommandAllocator> mInFlightCommandAllocators;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_COMMANDALLOCATORMANAGER_H_

src/dawn_native/d3d12/CommandBufferD3D12.cpp

@@ -33,7 +33,7 @@
 #include "dawn_native/d3d12/StagingDescriptorAllocatorD3D12.h"
 #include "dawn_native/d3d12/UtilsD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     namespace {
 
@@ -1649,4 +1649,4 @@ namespace dawn_native { namespace d3d12 {
         }
         return {};
     }
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/CommandBufferD3D12.h

@@ -22,7 +22,7 @@ namespace dawn_native {
     struct BeginRenderPassCmd;
 }  // namespace dawn_native
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class BindGroupStateTracker;
     class CommandRecordingContext;
@@ -52,6 +52,6 @@ namespace dawn_native { namespace d3d12 {
                                     const RenderPassBuilder* renderPassBuilder) const;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_COMMANDBUFFERD3D12_H_

src/dawn_native/d3d12/CommandRecordingContext.cpp

@@ -18,7 +18,7 @@
 #include "dawn_native/d3d12/HeapD3D12.h"
 #include "dawn_native/d3d12/ResidencyManagerD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     void CommandRecordingContext::AddToSharedTextureList(Texture* texture) {
         ASSERT(IsOpen());
@@ -123,4 +123,4 @@ namespace dawn_native { namespace d3d12 {
         mTempBuffers.emplace_back(tempBuffer);
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/CommandRecordingContext.h

@@ -21,7 +21,7 @@
 
 #include <set>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
     class CommandAllocatorManager;
     class Device;
     class Heap;
@@ -53,6 +53,6 @@ namespace dawn_native { namespace d3d12 {
 
         std::vector<Ref<Buffer>> mTempBuffers;
     };
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_COMMANDRECORDINGCONTEXT_H_

src/dawn_native/d3d12/ComputePipelineD3D12.cpp

@@ -22,7 +22,7 @@
 #include "dawn_native/d3d12/ShaderModuleD3D12.h"
 #include "dawn_native/d3d12/UtilsD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     Ref<ComputePipeline> ComputePipeline::CreateUninitialized(
         Device* device,
@@ -102,4 +102,4 @@ namespace dawn_native { namespace d3d12 {
         return ToBackend(GetDevice())->GetDispatchIndirectSignature();
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/ComputePipelineD3D12.h

@@ -19,7 +19,7 @@
 
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -53,6 +53,6 @@ namespace dawn_native { namespace d3d12 {
         ComPtr<ID3D12PipelineState> mPipelineState;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_COMPUTEPIPELINED3D12_H_

src/dawn_native/d3d12/D3D11on12Util.cpp

@@ -21,7 +21,7 @@
 #include "common/Log.h"
 #include "dawn_native/d3d12/DeviceD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     void Flush11On12DeviceToAvoidLeaks(ComPtr<ID3D11On12Device> d3d11on12Device) {
         if (d3d11on12Device == nullptr) {
@@ -161,4 +161,4 @@ namespace dawn_native { namespace d3d12 {
         return entry;
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/D3D11on12Util.h

@@ -25,7 +25,7 @@
 struct ID3D11On12Device;
 struct IDXGIKeyedMutex;
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     // Wraps 11 wrapped resources in a cache.
     class D3D11on12ResourceCacheEntry : public RefCounted {
@@ -84,6 +84,6 @@ namespace dawn_native { namespace d3d12 {
         Cache mCache;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D11ON12UTIL_H_

src/dawn_native/d3d12/D3D12Backend.cpp

@@ -26,7 +26,7 @@
 #include "dawn_native/d3d12/ResidencyManagerD3D12.h"
 #include "dawn_native/d3d12/TextureD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     ComPtr<ID3D12Device> GetD3D12Device(WGPUDevice device) {
         return ToBackend(FromAPI(device))->GetD3D12Device();
@@ -178,4 +178,4 @@ namespace dawn_native { namespace d3d12 {
     AdapterDiscoveryOptions::AdapterDiscoveryOptions(ComPtr<IDXGIAdapter> adapter)
         : AdapterDiscoveryOptionsBase(WGPUBackendType_D3D12), dxgiAdapter(std::move(adapter)) {
     }
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/D3D12Error.cpp

@@ -18,7 +18,7 @@
 #include <sstream>
 #include <string>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
     MaybeError CheckHRESULTImpl(HRESULT result, const char* context) {
         if (DAWN_LIKELY(SUCCEEDED(result))) {
             return {};
@@ -48,4 +48,4 @@ namespace dawn_native { namespace d3d12 {
         return CheckHRESULTImpl(result, context);
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/D3D12Error.h

@@ -19,7 +19,7 @@
 #include "dawn_native/Error.h"
 #include "dawn_native/ErrorInjector.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     constexpr HRESULT E_FAKE_ERROR_FOR_TESTING = MAKE_HRESULT(SEVERITY_ERROR, FACILITY_ITF, 0xFF);
     constexpr HRESULT E_FAKE_OUTOFMEMORY_ERROR_FOR_TESTING =
@@ -40,6 +40,6 @@ namespace dawn_native { namespace d3d12 {
                             E_FAKE_ERROR_FOR_TESTING),                      \
         contextIn)
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_D3D12ERROR_H_

src/dawn_native/d3d12/D3D12Info.cpp

@@ -20,7 +20,7 @@
 #include "dawn_native/d3d12/D3D12Error.h"
 #include "dawn_native/d3d12/PlatformFunctions.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     ResultOrError<D3D12DeviceInfo> GatherDeviceInfo(const Adapter& adapter) {
         D3D12DeviceInfo info = {};
@@ -119,4 +119,4 @@ namespace dawn_native { namespace d3d12 {
         return std::move(info);
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/D3D12Info.h

@@ -19,7 +19,7 @@
 #include "dawn_native/PerStage.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Adapter;
 
@@ -36,6 +36,6 @@ namespace dawn_native { namespace d3d12 {
     };
 
     ResultOrError<D3D12DeviceInfo> GatherDeviceInfo(const Adapter& adapter);
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_D3D12INFO_H_

src/dawn_native/d3d12/DeviceD3D12.cpp

@@ -44,7 +44,7 @@
 
 #include <sstream>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     // TODO(dawn:155): Figure out these values.
     static constexpr uint16_t kShaderVisibleDescriptorHeapSize = 1024;
@@ -742,4 +742,4 @@ namespace dawn_native { namespace d3d12 {
         return ToBackend(computePipeline)->UsesNumWorkgroups();
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/DeviceD3D12.h

@@ -22,7 +22,7 @@
 #include "dawn_native/d3d12/Forward.h"
 #include "dawn_native/d3d12/TextureD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class CommandAllocatorManager;
     class PlatformFunctions;
@@ -261,6 +261,6 @@ namespace dawn_native { namespace d3d12 {
         float mTimestampPeriod = 1.0f;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_DEVICED3D12_H_

src/dawn_native/d3d12/Forward.h

@@ -17,7 +17,7 @@
 
 #include "dawn_native/ToBackend.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Adapter;
     class BindGroup;
@@ -64,6 +64,6 @@ namespace dawn_native { namespace d3d12 {
         return ToBackendBase<D3D12BackendTraits>(common);
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_FORWARD_H_

src/dawn_native/d3d12/GPUDescriptorHeapAllocationD3D12.cpp

@@ -14,7 +14,7 @@
 
 #include "dawn_native/d3d12/GPUDescriptorHeapAllocationD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     GPUDescriptorHeapAllocation::GPUDescriptorHeapAllocation(
         D3D12_GPU_DESCRIPTOR_HANDLE baseDescriptor,
@@ -36,4 +36,4 @@ namespace dawn_native { namespace d3d12 {
     HeapVersionID GPUDescriptorHeapAllocation::GetHeapSerial() const {
         return mHeapSerial;
     }
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/GPUDescriptorHeapAllocationD3D12.h

@@ -19,7 +19,7 @@
 #include "dawn_native/d3d12/IntegerTypes.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     // Wrapper for a handle into a GPU-only descriptor heap.
     class GPUDescriptorHeapAllocation {
@@ -39,6 +39,6 @@ namespace dawn_native { namespace d3d12 {
         HeapVersionID mHeapSerial = HeapVersionID(0);
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_CPUDESCRIPTORHEAPALLOCATION_H_

src/dawn_native/d3d12/HeapAllocatorD3D12.cpp

@@ -18,7 +18,7 @@
 #include "dawn_native/d3d12/HeapD3D12.h"
 #include "dawn_native/d3d12/ResidencyManagerD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     HeapAllocator::HeapAllocator(Device* device,
                                  D3D12_HEAP_TYPE heapType,
@@ -68,4 +68,4 @@ namespace dawn_native { namespace d3d12 {
         mDevice->ReferenceUntilUnused(static_cast<Heap*>(heap.get())->GetD3D12Heap());
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/HeapAllocatorD3D12.h

@@ -19,7 +19,7 @@
 #include "dawn_native/ResourceHeapAllocator.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -43,6 +43,6 @@ namespace dawn_native { namespace d3d12 {
         MemorySegment mMemorySegment;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_HEAPALLOCATORD3D12_H_

src/dawn_native/d3d12/HeapD3D12.cpp

@@ -14,7 +14,7 @@
 
 #include "dawn_native/d3d12/HeapD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
     Heap::Heap(ComPtr<ID3D12Pageable> d3d12Pageable, MemorySegment memorySegment, uint64_t size)
         : Pageable(std::move(d3d12Pageable), memorySegment, size) {
         mD3d12Pageable.As(&mD3d12Heap);
@@ -28,4 +28,4 @@ namespace dawn_native { namespace d3d12 {
         return mD3d12Heap.Get();
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/HeapD3D12.h

@@ -19,7 +19,7 @@
 #include "dawn_native/d3d12/PageableD3D12.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -35,6 +35,6 @@ namespace dawn_native { namespace d3d12 {
       private:
         ComPtr<ID3D12Heap> mD3d12Heap;
     };
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_HEAPD3D12_H_

src/dawn_native/d3d12/IntegerTypes.h

@@ -20,7 +20,7 @@
 
 #include <cstdint>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     // An ID used to desambiguate between multiple uses of the same descriptor heap in the
     // BindGroup allocations.
@@ -29,6 +29,6 @@ namespace dawn_native { namespace d3d12 {
     // The monotonically increasing serial for external D3D12 mutexes imported in Dawn.
     using ExternalMutexSerial = TypedInteger<struct ExternalMutexSerialT, uint64_t>;
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_INTEGERTYPES_H_

src/dawn_native/d3d12/NativeSwapChainImplD3D12.cpp

@@ -18,7 +18,7 @@
 #include "dawn_native/d3d12/DeviceD3D12.h"
 #include "dawn_native/d3d12/TextureD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     namespace {
         DXGI_USAGE D3D12SwapChainBufferUsage(WGPUTextureUsage allowedUsages) {
@@ -117,4 +117,4 @@ namespace dawn_native { namespace d3d12 {
         return wgpu::TextureFormat::RGBA8Unorm;
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/NativeSwapChainImplD3D12.h

@@ -23,7 +23,7 @@
 
 #include <vector>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -55,6 +55,6 @@ namespace dawn_native { namespace d3d12 {
         uint32_t mCurrentBuffer;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_NATIVESWAPCHAINIMPLD3D12_H_

src/dawn_native/d3d12/PageableD3D12.cpp

@@ -14,7 +14,7 @@
 
 #include "dawn_native/d3d12/PageableD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
     Pageable::Pageable(ComPtr<ID3D12Pageable> d3d12Pageable,
                        MemorySegment memorySegment,
                        uint64_t size)
@@ -73,4 +73,4 @@ namespace dawn_native { namespace d3d12 {
     bool Pageable::IsResidencyLocked() const {
         return mResidencyLockRefCount != 0;
     }
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/PageableD3D12.h

@@ -20,7 +20,7 @@
 #include "dawn_native/IntegerTypes.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
     // This class is used to represent ID3D12Pageable allocations, and also serves as a node within
     // the ResidencyManager's LRU cache. This node is inserted into the LRU-cache when it is first
     // allocated, and any time it is scheduled to be used by the GPU. This node is removed from the
@@ -75,6 +75,6 @@ namespace dawn_native { namespace d3d12 {
         uint32_t mResidencyLockRefCount = 0;
         uint64_t mSize = 0;
     };
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif

src/dawn_native/d3d12/PipelineLayoutD3D12.cpp

@@ -24,7 +24,7 @@
 
 using Microsoft::WRL::ComPtr;
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
     namespace {
 
         // Reserve register names for internal use. This registers map to bindings in the shader,
@@ -364,4 +364,4 @@ namespace dawn_native { namespace d3d12 {
         return mDispatchIndirectCommandSignatureWithNumWorkgroups.Get();
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/PipelineLayoutD3D12.h

@@ -21,7 +21,7 @@
 #include "dawn_native/PipelineLayout.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -95,6 +95,6 @@ namespace dawn_native { namespace d3d12 {
         ComPtr<ID3D12CommandSignature> mDispatchIndirectCommandSignatureWithNumWorkgroups;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_PIPELINELAYOUTD3D12_H_

src/dawn_native/d3d12/PlatformFunctions.cpp

@@ -20,7 +20,7 @@
 #include <array>
 #include <sstream>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
     namespace {
         // Extract Version from "10.0.{Version}.0" if possible, otherwise return 0.
         uint32_t GetWindowsSDKVersionFromDirectoryName(const char* directoryName) {
@@ -268,4 +268,4 @@ namespace dawn_native { namespace d3d12 {
         }
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/PlatformFunctions.h

@@ -22,7 +22,7 @@
 
 #include <d3dcompiler.h>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     // Loads the functions required from the platform dynamically so that we don't need to rely on
     // them being present in the system. For example linking against d3d12.lib would prevent
@@ -105,6 +105,6 @@ namespace dawn_native { namespace d3d12 {
         DynamicLib mPIXEventRuntimeLib;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_PLATFORMFUNCTIONS_H_

src/dawn_native/d3d12/QuerySetD3D12.cpp

@@ -18,7 +18,7 @@
 #include "dawn_native/d3d12/DeviceD3D12.h"
 #include "dawn_native/d3d12/UtilsD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     namespace {
         D3D12_QUERY_HEAP_TYPE D3D12QueryHeapType(wgpu::QueryType type) {
@@ -72,4 +72,4 @@ namespace dawn_native { namespace d3d12 {
         SetDebugName(ToBackend(GetDevice()), mQueryHeap.Get(), "Dawn_QuerySet", GetLabel());
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/QuerySetD3D12.h

@@ -18,7 +18,7 @@
 #include "dawn_native/QuerySet.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -41,6 +41,6 @@ namespace dawn_native { namespace d3d12 {
         ComPtr<ID3D12QueryHeap> mQueryHeap;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_QUERYSETD3D12_H_

src/dawn_native/d3d12/QueueD3D12.cpp

@@ -24,7 +24,7 @@
 #include "dawn_platform/DawnPlatform.h"
 #include "dawn_platform/tracing/TraceEvent.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     Queue::Queue(Device* device) : QueueBase(device) {
     }
@@ -51,4 +51,4 @@ namespace dawn_native { namespace d3d12 {
         return {};
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/QueueD3D12.h

@@ -20,7 +20,7 @@
 #include "dawn_native/d3d12/CommandRecordingContext.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -32,6 +32,6 @@ namespace dawn_native { namespace d3d12 {
         MaybeError SubmitImpl(uint32_t commandCount, CommandBufferBase* const* commands) override;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_QUEUED3D12_H_

src/dawn_native/d3d12/RenderPassBuilderD3D12.cpp

@@ -21,7 +21,7 @@
 
 #include "dawn_native/dawn_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     namespace {
         D3D12_RENDER_PASS_BEGINNING_ACCESS_TYPE D3D12BeginningAccessType(wgpu::LoadOp loadOp) {
@@ -235,4 +235,4 @@ namespace dawn_native { namespace d3d12 {
             D3D12_RENDER_PASS_ENDING_ACCESS_TYPE_NO_ACCESS;
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/RenderPassBuilderD3D12.h

@@ -24,7 +24,7 @@
 
 #include <array>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class TextureView;
 
@@ -93,6 +93,6 @@ namespace dawn_native { namespace d3d12 {
                     kMaxColorAttachments>
             mSubresourceParams;
     };
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_RENDERPASSBUILDERD3D12_H_

src/dawn_native/d3d12/RenderPipelineD3D12.cpp

@@ -27,7 +27,7 @@
 
 #include <d3dcompiler.h>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     namespace {
         DXGI_FORMAT VertexFormatType(wgpu::VertexFormat format) {
@@ -487,4 +487,4 @@ namespace dawn_native { namespace d3d12 {
         CreateRenderPipelineAsyncTask::RunAsync(std::move(asyncTask));
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/RenderPipelineD3D12.h

@@ -20,7 +20,7 @@
 #include "dawn_native/d3d12/ShaderModuleD3D12.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -57,6 +57,6 @@ namespace dawn_native { namespace d3d12 {
         FirstOffsetInfo mFirstOffsetInfo;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_RENDERPIPELINED3D12_H_

src/dawn_native/d3d12/ResidencyManagerD3D12.cpp

@@ -20,7 +20,7 @@
 #include "dawn_native/d3d12/Forward.h"
 #include "dawn_native/d3d12/HeapD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     ResidencyManager::ResidencyManager(Device* device)
         : mDevice(device),
@@ -368,4 +368,4 @@ namespace dawn_native { namespace d3d12 {
         }
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/ResidencyManagerD3D12.h

@@ -22,7 +22,7 @@
 
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
     class Heap;
@@ -77,6 +77,6 @@ namespace dawn_native { namespace d3d12 {
         VideoMemoryInfo mVideoMemoryInfo = {};
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_RESIDENCYMANAGERD3D12_H_

src/dawn_native/d3d12/ResourceAllocatorManagerD3D12.cpp

@@ -21,7 +21,7 @@
 #include "dawn_native/d3d12/ResidencyManagerD3D12.h"
 #include "dawn_native/d3d12/UtilsD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
     namespace {
         MemorySegment GetMemorySegment(Device* device, D3D12_HEAP_TYPE heapType) {
             if (device->GetDeviceInfo().isUMA) {
@@ -407,4 +407,4 @@ namespace dawn_native { namespace d3d12 {
         }
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/ResourceAllocatorManagerD3D12.h

@@ -24,7 +24,7 @@
 
 #include <array>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -102,6 +102,6 @@ namespace dawn_native { namespace d3d12 {
         SerialQueue<ExecutionSerial, ResourceHeapAllocation> mAllocationsToDelete;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_RESOURCEALLOCATORMANAGERD3D12_H_

src/dawn_native/d3d12/ResourceHeapAllocationD3D12.cpp

@@ -19,7 +19,7 @@
 
 #include <utility>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
     ResourceHeapAllocation::ResourceHeapAllocation(const AllocationInfo& info,
                                                    uint64_t offset,
                                                    ComPtr<ID3D12Resource> resource,
@@ -40,4 +40,4 @@ namespace dawn_native { namespace d3d12 {
     D3D12_GPU_VIRTUAL_ADDRESS ResourceHeapAllocation::GetGPUPointer() const {
         return mResource->GetGPUVirtualAddress();
     }
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/ResourceHeapAllocationD3D12.h

@@ -19,7 +19,7 @@
 #include "dawn_native/ResourceMemoryAllocation.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Heap;
 
@@ -43,6 +43,6 @@ namespace dawn_native { namespace d3d12 {
         ComPtr<ID3D12Resource> mResource;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_RESOURCEHEAPALLOCATIOND3D12_H_

src/dawn_native/d3d12/SamplerD3D12.cpp

@@ -17,7 +17,7 @@
 #include "dawn_native/d3d12/DeviceD3D12.h"
 #include "dawn_native/d3d12/UtilsD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     namespace {
         D3D12_TEXTURE_ADDRESS_MODE AddressMode(wgpu::AddressMode mode) {
@@ -103,4 +103,4 @@ namespace dawn_native { namespace d3d12 {
         return mSamplerDesc;
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/SamplerD3D12.h

@@ -19,7 +19,7 @@
 
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -35,6 +35,6 @@ namespace dawn_native { namespace d3d12 {
         D3D12_SAMPLER_DESC mSamplerDesc = {};
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_SAMPLERD3D12_H_

src/dawn_native/d3d12/SamplerHeapCacheD3D12.cpp

@@ -24,7 +24,7 @@
 #include "dawn_native/d3d12/ShaderVisibleDescriptorAllocatorD3D12.h"
 #include "dawn_native/d3d12/StagingDescriptorAllocatorD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     SamplerHeapCacheEntry::SamplerHeapCacheEntry(std::vector<Sampler*> samplers)
         : mSamplers(std::move(samplers)) {
@@ -163,4 +163,4 @@ namespace dawn_native { namespace d3d12 {
                                                          const SamplerHeapCacheEntry* b) const {
         return a->mSamplers == b->mSamplers;
     }
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/SamplerHeapCacheD3D12.h

@@ -32,7 +32,7 @@
 //
 // The cache is primary needed for the GPU sampler heap, which is much smaller than the view heap
 // and switches incur expensive pipeline flushes.
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class BindGroup;
     class Device;
@@ -102,6 +102,6 @@ namespace dawn_native { namespace d3d12 {
         Cache mCache;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_SAMPLERHEAPCACHE_H_

src/dawn_native/d3d12/ShaderModuleD3D12.cpp

@@ -34,7 +34,7 @@
 #include <sstream>
 #include <unordered_map>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     namespace {
         ResultOrError<uint64_t> GetDXCompilerVersion(ComPtr<IDxcValidator> dxcValidator) {
@@ -828,4 +828,4 @@ namespace dawn_native { namespace d3d12 {
         UNREACHABLE();
         return {};
     }
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/ShaderModuleD3D12.h

@@ -24,7 +24,7 @@ namespace dawn_native {
     struct ProgrammableStage;
 }  // namespace dawn_native
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
     class PipelineLayout;
@@ -64,6 +64,6 @@ namespace dawn_native { namespace d3d12 {
         MaybeError Initialize(ShaderModuleParseResult* parseResult);
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_SHADERMODULED3D12_H_

src/dawn_native/d3d12/ShaderVisibleDescriptorAllocatorD3D12.cpp

@@ -18,7 +18,7 @@
 #include "dawn_native/d3d12/GPUDescriptorHeapAllocationD3D12.h"
 #include "dawn_native/d3d12/ResidencyManagerD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     // Limits the min/max heap size to always be some known value for testing.
     // Thresholds should be adjusted (lower == faster) to avoid tests taking too long to complete.
@@ -251,4 +251,4 @@ namespace dawn_native { namespace d3d12 {
     ID3D12DescriptorHeap* ShaderVisibleDescriptorHeap::GetD3D12DescriptorHeap() const {
         return mD3d12DescriptorHeap.Get();
     }
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/ShaderVisibleDescriptorAllocatorD3D12.h

@@ -29,7 +29,7 @@
 // of two states: switched in or out. Only a switched in heap can be bound to the pipeline. If
 // the heap is full, the caller must switch-in a new heap before re-allocating and the old one
 // is returned to the pool.
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
     class GPUDescriptorHeapAllocation;
@@ -100,6 +100,6 @@ namespace dawn_native { namespace d3d12 {
         // This is stored on the allocator to avoid extra conversions.
         uint32_t mDescriptorCount = 0;
     };
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_SHADERVISIBLEDESCRIPTORALLOCATOR_H_

src/dawn_native/d3d12/StagingBufferD3D12.cpp

@@ -19,7 +19,7 @@
 #include "dawn_native/d3d12/ResidencyManagerD3D12.h"
 #include "dawn_native/d3d12/UtilsD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     StagingBuffer::StagingBuffer(size_t size, Device* device)
         : StagingBufferBase(size), mDevice(device) {
@@ -74,4 +74,4 @@ namespace dawn_native { namespace d3d12 {
     ID3D12Resource* StagingBuffer::GetResource() const {
         return mUploadHeap.GetD3D12Resource();
     }
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/StagingBufferD3D12.h

@@ -19,7 +19,7 @@
 #include "dawn_native/d3d12/ResourceHeapAllocationD3D12.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -36,6 +36,6 @@ namespace dawn_native { namespace d3d12 {
         Device* mDevice;
         ResourceHeapAllocation mUploadHeap;
     };
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_STAGINGBUFFERD3D12_H_

src/dawn_native/d3d12/StagingDescriptorAllocatorD3D12.cpp

@@ -18,7 +18,7 @@
 #include "dawn_native/d3d12/DeviceD3D12.h"
 #include "dawn_native/d3d12/StagingDescriptorAllocatorD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     StagingDescriptorAllocator::StagingDescriptorAllocator(Device* device,
                                                            uint32_t descriptorCount,
@@ -149,4 +149,4 @@ namespace dawn_native { namespace d3d12 {
         mAllocationsToDelete.ClearUpTo(completedSerial);
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/StagingDescriptorAllocatorD3D12.h

@@ -30,7 +30,7 @@
 // at-least one free block. If no AVAILABLE heap exists, a new heap is created and inserted
 // back into the pool to be immediately used. To deallocate, the block corresponding to the
 // offset is inserted back into the free-list.
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
 
@@ -80,6 +80,6 @@ namespace dawn_native { namespace d3d12 {
         SerialQueue<ExecutionSerial, CPUDescriptorHeapAllocation> mAllocationsToDelete;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_STAGINGDESCRIPTORALLOCATOR_H_

src/dawn_native/d3d12/SwapChainD3D12.cpp

@@ -23,7 +23,7 @@
 
 #include <windows.ui.xaml.media.dxinterop.h>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
     namespace {
 
         uint32_t PresentModeToBufferCount(wgpu::PresentMode mode) {
@@ -374,4 +374,4 @@ namespace dawn_native { namespace d3d12 {
         mBuffers.clear();
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/SwapChainD3D12.h

@@ -20,7 +20,7 @@
 #include "dawn_native/IntegerTypes.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class Device;
     class Texture;
@@ -84,6 +84,6 @@ namespace dawn_native { namespace d3d12 {
         Ref<Texture> mApiTexture;
     };
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_SWAPCHAIN_D3D12_H_

src/dawn_native/d3d12/TextureCopySplitter.cpp

@@ -18,7 +18,7 @@
 #include "dawn_native/Format.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     namespace {
         Origin3D ComputeTexelOffsets(const TexelBlockInfo& blockInfo,
@@ -536,4 +536,4 @@ namespace dawn_native { namespace d3d12 {
 
         return copySubresource;
     }
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/TextureCopySplitter.h

@@ -25,7 +25,7 @@ namespace dawn_native {
 
 }  // namespace dawn_native
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     struct TextureCopySubresource {
         static constexpr unsigned int kMaxTextureCopyRegions = 4;
@@ -92,6 +92,6 @@ namespace dawn_native { namespace d3d12 {
                                                       uint64_t offset,
                                                       uint32_t bytesPerRow,
                                                       uint32_t rowsPerImage);
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_TEXTURECOPYSPLITTER_H_

src/dawn_native/d3d12/TextureD3D12.cpp

@@ -31,7 +31,7 @@
 #include "dawn_native/d3d12/TextureCopySplitter.h"
 #include "dawn_native/d3d12/UtilsD3D12.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     namespace {
         D3D12_RESOURCE_STATES D3D12TextureUsage(wgpu::TextureUsage usage, const Format& format) {
@@ -1377,4 +1377,4 @@ namespace dawn_native { namespace d3d12 {
         return uavDesc;
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/TextureD3D12.h

@@ -24,7 +24,7 @@
 #include "dawn_native/d3d12/ResourceHeapAllocationD3D12.h"
 #include "dawn_native/d3d12/d3d12_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     class CommandRecordingContext;
     class Device;
@@ -159,6 +159,6 @@ namespace dawn_native { namespace d3d12 {
 
         D3D12_SHADER_RESOURCE_VIEW_DESC mSrvDesc;
     };
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_TEXTURED3D12_H_

src/dawn_native/d3d12/UtilsD3D12.cpp

@@ -23,7 +23,7 @@
 
 #include <stringapiset.h>
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     ResultOrError<std::wstring> ConvertStringToWstring(const char* str) {
         size_t len = strlen(str);
@@ -388,4 +388,4 @@ namespace dawn_native { namespace d3d12 {
         object->SetPrivateData(WKPDID_D3DDebugObjectName, objectName.length(), objectName.c_str());
     }
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/UtilsD3D12.h

@@ -22,7 +22,7 @@
 #include "dawn_native/d3d12/d3d12_platform.h"
 #include "dawn_native/dawn_platform.h"
 
-namespace dawn_native { namespace d3d12 {
+namespace dawn_native::d3d12 {
 
     ResultOrError<std::wstring> ConvertStringToWstring(const char* str);
 
@@ -86,6 +86,6 @@ namespace dawn_native { namespace d3d12 {
                       const char* prefix,
                       std::string label = "");
 
-}}  // namespace dawn_native::d3d12
+}  // namespace dawn_native::d3d12
 
 #endif  // DAWNNATIVE_D3D12_UTILSD3D12_H_

src/dawn_native/metal/BackendMTL.h

@@ -17,7 +17,7 @@
 
 #include "dawn_native/BackendConnection.h"
 
-namespace dawn_native { namespace metal {
+namespace dawn_native::metal {
 
     class Backend : public BackendConnection {
       public:
@@ -28,6 +28,6 @@ namespace dawn_native { namespace metal {
             const AdapterDiscoveryOptionsBase* optionsBase) override;
     };
 
-}}  // namespace dawn_native::metal
+}  // namespace dawn_native::metal
 
 #endif  // DAWNNATIVE_METAL_BACKENDMTL_H_

src/dawn_native/metal/BackendMTL.mm

@@ -31,7 +31,7 @@
 
 #include <vector>
 
-namespace dawn_native { namespace metal {
+namespace dawn_native::metal {
 
     namespace {
 
@@ -613,4 +613,4 @@ namespace dawn_native { namespace metal {
         return new Backend(instance);
     }
 
-}}  // namespace dawn_native::metal
+}  // namespace dawn_native::metal

src/dawn_native/metal/BindGroupLayoutMTL.h

@@ -18,7 +18,7 @@
 #include "common/SlabAllocator.h"
 #include "dawn_native/BindGroupLayout.h"
 
-namespace dawn_native { namespace metal {
+namespace dawn_native::metal {
 
     class BindGroup;
     class Device;
@@ -41,6 +41,6 @@ namespace dawn_native { namespace metal {
         SlabAllocator<BindGroup> mBindGroupAllocator;
     };
 
-}}  // namespace dawn_native::metal
+}  // namespace dawn_native::metal
 
 #endif  // DAWNNATIVE_METAL_BINDGROUPLAYOUTMTL_H_

src/dawn_native/metal/BindGroupLayoutMTL.mm

@@ -16,7 +16,7 @@
 
 #include "dawn_native/metal/BindGroupMTL.h"
 
-namespace dawn_native { namespace metal {
+namespace dawn_native::metal {
 
     // static
     Ref<BindGroupLayout> BindGroupLayout::Create(
@@ -42,4 +42,4 @@ namespace dawn_native { namespace metal {
         mBindGroupAllocator.Deallocate(bindGroup);
     }
 
-}}  // namespace dawn_native::metal
+}  // namespace dawn_native::metal

src/dawn_native/metal/BindGroupMTL.h

@@ -18,7 +18,7 @@
 #include "common/PlacementAllocated.h"
 #include "dawn_native/BindGroup.h"
 
-namespace dawn_native { namespace metal {
+namespace dawn_native::metal {
 
     class Device;
 
@@ -34,6 +34,6 @@ namespace dawn_native { namespace metal {
         void DestroyImpl() override;
     };
 
-}}  // namespace dawn_native::metal
+}  // namespace dawn_native::metal
 
 #endif  // DAWNNATIVE_METAL_BINDGROUPMTL_H_

src/dawn_native/metal/BindGroupMTL.mm

@@ -16,7 +16,7 @@
 
 #include "dawn_native/metal/BindGroupLayoutMTL.h"
 #include "dawn_native/metal/DeviceMTL.h"
-namespace dawn_native { namespace metal {
+namespace dawn_native::metal {
 
     BindGroup::BindGroup(Device* device, const BindGroupDescriptor* descriptor)
         : BindGroupBase(this, device, descriptor) {
@@ -34,4 +34,4 @@ namespace dawn_native { namespace metal {
         return ToBackend(descriptor->layout)->AllocateBindGroup(device, descriptor);
     }
 
-}}  // namespace dawn_native::metal
+}  // namespace dawn_native::metal

src/dawn_native/metal/BufferMTL.h

@@ -21,7 +21,7 @@
 
 #import <Metal/Metal.h>
 
-namespace dawn_native { namespace metal {
+namespace dawn_native::metal {
 
     class CommandRecordingContext;
     class Device;
@@ -62,6 +62,6 @@ namespace dawn_native { namespace metal {
         NSPRef<id<MTLBuffer>> mMtlBuffer;
     };
 
-}}  // namespace dawn_native::metal
+}  // namespace dawn_native::metal
 
 #endif  // DAWNNATIVE_METAL_BUFFERMTL_H_

src/dawn_native/metal/BufferMTL.mm

@@ -21,7 +21,7 @@
 
 #include <limits>
 
-namespace dawn_native { namespace metal {
+namespace dawn_native::metal {
     // The size of uniform buffer and storage buffer need to be aligned to 16 bytes which is the
     // largest alignment of supported data types
     static constexpr uint32_t kMinUniformOrStorageBufferAlignment = 16u;
@@ -237,4 +237,4 @@ namespace dawn_native { namespace metal {
                                            value:clearValue];
     }
 
-}}  // namespace dawn_native::metal
+}  // namespace dawn_native::metal

src/dawn_native/metal/CommandBufferMTL.h

@@ -24,7 +24,7 @@ namespace dawn_native {
     class CommandEncoder;
 }
 
-namespace dawn_native { namespace metal {
+namespace dawn_native::metal {
 
     class CommandRecordingContext;
     class Device;
@@ -64,6 +64,6 @@ namespace dawn_native { namespace metal {
                                             uint32_t height);
     };
 
-}}  // namespace dawn_native::metal
+}  // namespace dawn_native::metal
 
 #endif  // DAWNNATIVE_METAL_COMMANDBUFFERMTL_H_