Rename namespace dawn_native to dawn::native.

But keep a namespace alias to avoid breaking project that depend on the
previous namespace name while they get updated.

Done with through the following steps:

 - git grep -l dawn_native:: | xargs sed -i "" "s/dawn_native::/dawn::native::/g"
 - git grep -l "namespace dawn_native" | xargs sed -i "" "s/namespace dawn_native/namespace dawn::native/g"
 - git cl format
 - Manual fixups in generator/templates (and the addition of
   namespace_case in dawn_json_generator.py).
 - The addition of the namespace alias in DawnNative.h

Bug: dawn:824
Change-Id: I676cc4e3ced2e0e4bab32a0d66d7eaf9537e3f09
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/75982
Reviewed-by: Loko Kung <lokokung@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Auto-Submit: Corentin Wallez <cwallez@chromium.org>

generator/dawn_json_generator.py

@@ -68,6 +68,9 @@ class Name:
     def snake_case(self):
         return '_'.join(self.chunks)
 
+    def namespace_case(self):
+        return '::'.join(self.chunks)
+
     def js_enum_case(self):
         result = self.chunks[0].lower()
         for chunk in self.chunks[1:]:

generator/templates/dawn_native/ChainUtils.cpp

@@ -13,8 +13,9 @@
 // limitations under the License.
 
 {% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
-{% set native_namespace = Name(metadata.native_namespace).snake_case() %}
-{% set native_dir = impl_dir + native_namespace %}
+{% set namespace_name = Name(metadata.native_namespace) %}
+{% set native_namespace = namespace_name.namespace_case() %}
+{% set native_dir = impl_dir + namespace_name.snake_case() %}
 #include "{{native_dir}}/ChainUtils_autogen.h"
 
 #include <unordered_set>

generator/templates/dawn_native/ChainUtils.h

@@ -18,8 +18,9 @@
 #define {{DIR}}_CHAIN_UTILS_H_
 
 {% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
-{% set native_namespace = namespace_name.snake_case() %}
-{% set native_dir = impl_dir + native_namespace %}
+{% set namespace_name = Name(metadata.native_namespace) %}
+{% set native_namespace = namespace_name.namespace_case() %}
+{% set native_dir = impl_dir + namespace_name.snake_case() %}
 {% set prefix = metadata.proc_table_prefix.lower() %}
 #include "{{native_dir}}/{{prefix}}_platform.h"
 #include "{{native_dir}}/Error.h"

generator/templates/dawn_native/ObjectType.cpp

@@ -12,9 +12,10 @@
 //* See the License for the specific language governing permissions and
 //* limitations under the License.
 
-{% set native_namespace = Name(metadata.native_namespace).snake_case() %}
 {% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
-{% set native_dir = impl_dir + native_namespace %}
+{% set namespace_name = Name(metadata.native_namespace) %}
+{% set native_namespace = namespace_name.namespace_case() %}
+{% set native_dir = impl_dir + namespace_name.snake_case() %}
 #include "{{native_dir}}/ObjectType_autogen.h"
 
 namespace {{native_namespace}} {

generator/templates/dawn_native/ObjectType.h

@@ -21,7 +21,7 @@
 
 #include <cstdint>
 
-{% set native_namespace = namespace_name.snake_case() %}
+{% set native_namespace = namespace_name.namespace_case() %}
 namespace {{native_namespace}} {
 
     enum class ObjectType : uint32_t {

generator/templates/dawn_native/ProcTable.cpp

@@ -14,9 +14,10 @@
 
 {% set Prefix = metadata.proc_table_prefix %}
 {% set prefix = Prefix.lower() %}
-{% set native_namespace = Name(metadata.native_namespace).snake_case() %}
 {% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
-{% set native_dir = impl_dir + native_namespace %}
+{% set namespace_name = Name(metadata.native_namespace) %}
+{% set native_namespace = namespace_name.namespace_case() %}
+{% set native_dir = impl_dir + namespace_name.snake_case() %}
 #include "{{native_dir}}/{{prefix}}_platform.h"
 #include "{{native_dir}}/{{Prefix}}Native.h"
 

generator/templates/dawn_native/ValidationUtils.cpp

@@ -12,9 +12,10 @@
 //* See the License for the specific language governing permissions and
 //* limitations under the License.
 
-{% set native_namespace = Name(metadata.native_namespace).snake_case() %}
 {% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
-{% set native_dir = impl_dir + native_namespace %}
+{% set namespace_name = Name(metadata.native_namespace) %}
+{% set native_namespace = namespace_name.namespace_case() %}
+{% set native_dir = impl_dir + namespace_name.snake_case() %}
 #include "{{native_dir}}/ValidationUtils_autogen.h"
 
 namespace {{native_namespace}} {

generator/templates/dawn_native/ValidationUtils.h

@@ -18,9 +18,10 @@
 {% set api = metadata.api.lower() %}
 #include "dawn/{{api}}_cpp.h"
 
-{% set native_namespace = Name(metadata.native_namespace).snake_case() %}
 {% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
-{% set native_dir = impl_dir + native_namespace %}
+{% set namespace_name = Name(metadata.native_namespace) %}
+{% set native_namespace = namespace_name.namespace_case() %}
+{% set native_dir = impl_dir + namespace_name.snake_case() %}
 #include "{{native_dir}}/Error.h"
 
 namespace {{native_namespace}} {

generator/templates/dawn_native/api_absl_format.cpp

@@ -13,8 +13,9 @@
 //* limitations under the License.
 
 {% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
-{% set native_namespace = Name(metadata.native_namespace).snake_case() %}
-{% set native_dir = impl_dir + native_namespace %}
+{% set namespace_name = Name(metadata.native_namespace) %}
+{% set native_namespace = namespace_name.namespace_case() %}
+{% set native_dir = impl_dir + namespace_name.snake_case() %}
 {% set api = metadata.api.lower() %}
 #include "{{native_dir}}/{{api}}_absl_format_autogen.h"
 

generator/templates/dawn_native/api_absl_format.h

@@ -17,8 +17,9 @@
 #define {{API}}_ABSL_FORMAT_H_
 
 {% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
-{% set native_namespace = Name(metadata.native_namespace).snake_case() %}
-{% set native_dir = impl_dir + native_namespace %}
+{% set namespace_name = Name(metadata.native_namespace) %}
+{% set native_namespace = namespace_name.namespace_case() %}
+{% set native_dir = impl_dir + namespace_name.snake_case() %}
 {% set prefix = metadata.proc_table_prefix.lower() %}
 #include "{{native_dir}}/{{prefix}}_platform.h"
 

generator/templates/dawn_native/api_dawn_native_proc.cpp

@@ -14,7 +14,7 @@
 
 #include <dawn/{{metadata.api.lower()}}.h>
 
-namespace dawn_native {
+namespace dawn::native {
 
 // This file should be kept in sync with generator/templates/dawn_native/ProcTable.cpp
 
@@ -39,7 +39,7 @@ namespace dawn_native {
 }
 
 extern "C" {
-    using namespace dawn_native;
+    using namespace dawn::native;
 
     {% for function in by_category["function"] %}
         {{as_cType(function.return_type.name)}} {{metadata.namespace}}{{as_cppType(function.name)}} (

generator/templates/dawn_native/api_structs.cpp

@@ -12,9 +12,10 @@
 //* See the License for the specific language governing permissions and
 //* limitations under the License.
 
-{% set native_namespace = Name(metadata.native_namespace).snake_case() %}
 {% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
-{% set native_dir = impl_dir + native_namespace %}
+{% set namespace_name = Name(metadata.native_namespace) %}
+{% set native_namespace = namespace_name.namespace_case() %}
+{% set native_dir = impl_dir + namespace_name.snake_case() %}
 {% set namespace = metadata.namespace %}
 #include "{{native_dir}}/{{namespace}}_structs_autogen.h"
 

generator/templates/dawn_native/api_structs.h

@@ -21,8 +21,8 @@
 {% set api = metadata.api.lower() %}
 #include "dawn/{{api}}_cpp.h"
 {% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
-{% set native_namespace = namespace_name.snake_case() %}
-{% set native_dir = impl_dir + native_namespace %}
+{% set native_namespace = namespace_name.namespace_case() %}
+{% set native_dir = impl_dir + namespace_name.snake_case() %}
 #include "{{native_dir}}/Forward.h"
 
 namespace {{native_namespace}} {

generator/templates/dawn_native/dawn_platform.h

@@ -21,13 +21,13 @@
 {% set api = metadata.api.lower() %}
 #include "dawn/{{api}}_cpp.h"
 {% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
-{% set native_namespace = namespace_name.snake_case() %}
-{% set native_dir = impl_dir + native_namespace %}
+{% set native_namespace = namespace_name.namespace_case() %}
+{% set native_dir = impl_dir + namespace_name.snake_case() %}
 #include "{{native_dir}}/Forward.h"
 
 {% set namespace = metadata.namespace %}
 // Use our autogenerated version of the {{namespace}} structures that point to {{native_namespace}} object types
-// (wgpu::Buffer is dawn_native::BufferBase*)
+// (wgpu::Buffer is dawn::native::BufferBase*)
 #include <{{native_dir}}/{{namespace}}_structs_autogen.h>
 
 namespace {{native_namespace}} {
@@ -79,4 +79,4 @@ namespace {{native_namespace}} {
     {% endfor %}
 }
 
-#endif  // {{NATIVE_DIR}}_{{PREFIX}}_PLATFORM_AUTOGEN_H_
+#endif  // {{NATIVE_DIR}}_{{PREFIX}}_PLATFORM_AUTOGEN_H_

generator/templates/opengl/OpenGLFunctionsBase.cpp

@@ -14,7 +14,7 @@
 
 #include "dawn_native/opengl/OpenGLFunctionsBase_autogen.h"
 
-namespace dawn_native::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::opengl {
+namespace dawn::native::opengl {
     using GetProcAddress = void* (*) (const char*);
 
     struct OpenGLFunctionsBase {
@@ -40,6 +40,6 @@ namespace dawn_native::opengl {
         MaybeError LoadProc(GetProcAddress getProc, T* memberProc, const char* name);
     };
 
-}  // namespace dawn_native::opengl
+}  // namespace dawn::native::opengl
 
 #endif // DAWNNATIVE_OPENGL_OPENGLFUNCTIONSBASE_H_