Mojo C++ bindings: extract code shared by different variants.

mojo/public/tools/bindings/generators/cpp_templates/module-shared-internal.h.tmpl

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// TODO(yzshen): Move code here.
+{%- set header_guard = "%s_SHARED_INTERNAL_H_"|format(
+        module.path|upper|replace("/","_")|replace(".","_")|
+            replace("-", "_")) %}
+
+#ifndef {{header_guard}}
+#define {{header_guard}}
+
+#include <stdint.h>
+
+#include "mojo/public/cpp/bindings/lib/array_internal.h"
+#include "mojo/public/cpp/bindings/lib/bindings_internal.h"
+#include "mojo/public/cpp/bindings/lib/map_data_internal.h"
+#include "mojo/public/cpp/bindings/lib/native_enum_data.h"
+#include "mojo/public/cpp/bindings/lib/native_struct_data.h"
+#include "mojo/public/cpp/bindings/lib/buffer.h"
+
+{%- for import in imports %}
+#include "{{import.module.path}}-shared-internal.h"
+{%- endfor %}
+
+namespace mojo {
+namespace internal {
+class ValidationContext;
+}
+}
+
+{%- for namespace in namespaces_as_array %}
+namespace {{namespace}} {
+{%- endfor %}
+namespace internal {
+
+{#--- Internal forward declarations #}
+{%- for struct in structs %}
+{%-   if struct|is_native_only_kind %}
+using {{struct.name}}_Data = mojo::internal::NativeStruct_Data;
+{%-   else %}
+class {{struct.name}}_Data;
+{%-   endif %}
+{%- endfor %}
+
+{%- for union in unions %}
+class {{union.name}}_Data;
+{%- endfor %}
+
+{#--- Enums #}
+{%- from "enum_macros.tmpl" import enum_data_decl -%}
+{%- for enum in all_enums %}
+{%-   if enum|is_native_only_kind %}
+using {{enum.name}}_Data = mojo::internal::NativeEnum_Data;
+{%-   else %}
+{{enum_data_decl(enum)}}
+{%-   endif %}
+{%- endfor %}
+
+#pragma pack(push, 1)
+
+{#--- Unions must be declared first because they can be members of structs #}
+{#--- Union class declarations #}
+{%- for union in unions %}
+{%    include "union_declaration.tmpl" %}
+{%- endfor %}
+
+{#--- Struct class declarations #}
+{%- for struct in structs %}
+{%-   if not struct|is_native_only_kind %}
+{%      include "struct_declaration.tmpl" %}
+{%-   endif %}
+{%- endfor %}
+
+{#--- Interface parameter definitions #}
+{%- for interface in interfaces %}
+{%-   for method in interface.methods %}
+{%-     set method_name = "k%s_%s_Name"|format(interface.name, method.name) %}
+const uint32_t {{method_name}} = {{method.ordinal}};
+{%-     set struct = method.param_struct %}
+{%      include "struct_declaration.tmpl" %}
+{%-     if method.response_parameters != None %}
+{%-       set struct = method.response_param_struct %}
+{%        include "struct_declaration.tmpl" %}
+{%-     endif %}
+{%-   endfor %}
+{%- endfor %}
+
+#pragma pack(pop)
+
+}  // namespace internal
+{%- for namespace in namespaces_as_array|reverse %}
+}  // namespace {{namespace}}
+{%- endfor %}
+
+#endif  // {{header_guard}}