Mojo: Prefix user-defined parameter names to avoid conflicts

mojo/public/bindings/generators/cpp_templates/interface_definition.tmpl

 {%- set class_name = interface.name %}
 {%- set proxy_name = interface.name ~ "Proxy" %}
 
 {{proxy_name}}::{{proxy_name}}(mojo::MessageReceiver* receiver)
     : receiver_(receiver) {
 }
 
 {#--- Proxy definitions #}
 {%- macro params_list(method) %}
 {%-   for param in method.parameters -%}
-{{param.kind|cpp_const_wrapper_type}} {{param.name}}
+{{param.kind|cpp_const_wrapper_type}} in_{{param.name}}
 {%- if not loop.last %}, {% endif %}
 {%-   endfor %}
 {%- endmacro %}
 
 {%- for method in interface.methods %}
 {%-   set name = "internal::k%s_%s_Name"|format(interface.name, method.name) %}
 {%-   set params_name =
           "internal::%s_%s_Params_Data"|format(interface.name, method.name) %}
 void {{proxy_name}}::{{method.name}}({{params_list(method)}}) {
   size_t payload_size =
       mojo::internal::Align(sizeof({{params_name}}));
 {#--- Computes #}
 {%-   for param in method.parameters %}
 {%-     if param.kind|is_object_kind %}
-  if (!{{param.name}}.is_null())
-    payload_size += mojo::internal::Unwrap({{param.name}})->ComputeSize();
+  if (!in_{{param.name}}.is_null())
+    payload_size += mojo::internal::Unwrap(in_{{param.name}})->ComputeSize();
 {%-     endif %}
 {%-   endfor %}
 
   mojo::internal::MessageBuilder builder({{name}}, payload_size);
 
   {{params_name}}* params =
       {{params_name}}::New(builder.buffer());
 
 {#--- Sets #}
 {%   for param in method.parameters %}
 {%-     if param.kind|is_object_kind %}
-  if (!{{param.name}}.is_null())
+  if (!in_{{param.name}}.is_null())
     params->set_{{param.name}}(
-        mojo::internal::Unwrap({{param.name}})->Clone(builder.buffer()));
+        mojo::internal::Unwrap(in_{{param.name}})->Clone(builder.buffer()));
 {%-     elif param.kind|is_handle_kind %}
-  params->set_{{param.name}}({{param.name}}.release());
+  params->set_{{param.name}}(in_{{param.name}}.release());
 {%-     else %}
-  params->set_{{param.name}}({{param.name}});
+  params->set_{{param.name}}(in_{{param.name}});
 {%-     endif %}
 {%-   endfor %}
 
   mojo::Message message;
   params->EncodePointersAndHandles(&message.handles);
 
   message.data = builder.Finish();
 
   receiver_->Accept(&message);
 }
@@ skipping 28 matching lines @@
       if (!params->DecodePointersAndHandles(message))
         return false;
       sink_->{{method.name}}({{params(method)}});
       params->CloseHandles();
       break;
     }
 {%- endfor %}
   }
   return true;
 }