Change the names of cluster-objects function arguments. (#27945)

Using "tag" as a function argument leads to compile failure when a struct with a
field named "Tag" (which becomes a member named "tag") is added to the spec.
Change to aTag (and aWriter) to avoid the name collision.

This does not change either API or ABI for consumers; just the naming of the
argument inside the function.

Author: bzbarsky-apple

src/app/zap-templates/templates/app/cluster-objects-src.zapt

@@ -34,13 +34,13 @@ namespace Structs {
 namespace Commands {
 {{#zcl_commands}}
 namespace {{asUpperCamelCase name}} {
-CHIP_ERROR Type::Encode(TLV::TLVWriter &writer, TLV::Tag tag) const{
+CHIP_ERROR Type::Encode(TLV::TLVWriter & aWriter, TLV::Tag aTag) const{
     TLV::TLVType outer;
-    ReturnErrorOnFailure(writer.StartContainer(tag, TLV::kTLVType_Structure, outer));
+    ReturnErrorOnFailure(aWriter.StartContainer(aTag, TLV::kTLVType_Structure, outer));
     {{#zcl_command_arguments}}
-    ReturnErrorOnFailure(DataModel::Encode(writer, TLV::ContextTag(Fields::k{{asUpperCamelCase label}}), {{asLowerCamelCase label}}));
+    ReturnErrorOnFailure(DataModel::Encode(aWriter, TLV::ContextTag(Fields::k{{asUpperCamelCase label}}), {{asLowerCamelCase label}}));
     {{/zcl_command_arguments}}
-    ReturnErrorOnFailure(writer.EndContainer(outer));
+    ReturnErrorOnFailure(aWriter.EndContainer(outer));
     return CHIP_NO_ERROR;
 }
 
@@ -94,17 +94,17 @@ CHIP_ERROR TypeInfo::DecodableType::Decode(TLV::TLVReader &reader, const Concret
 namespace Events {
 {{#zcl_events}}
 namespace {{asUpperCamelCase name}} {
-CHIP_ERROR Type::Encode(TLV::TLVWriter &writer, TLV::Tag tag) const{
+CHIP_ERROR Type::Encode(TLV::TLVWriter & aWriter, TLV::Tag aTag) const{
     TLV::TLVType outer;
-    ReturnErrorOnFailure(writer.StartContainer(tag, TLV::kTLVType_Structure, outer));
+    ReturnErrorOnFailure(aWriter.StartContainer(aTag, TLV::kTLVType_Structure, outer));
     {{#zcl_event_fields}}
     {{#if_is_fabric_scoped_struct type}}
-    ReturnErrorOnFailure(DataModel::EncodeForRead(writer, TLV::ContextTag(Fields::k{{asUpperCamelCase name}}), GetFabricIndex(), {{asLowerCamelCase name}}));
+    ReturnErrorOnFailure(DataModel::EncodeForRead(aWriter, TLV::ContextTag(Fields::k{{asUpperCamelCase name}}), GetFabricIndex(), {{asLowerCamelCase name}}));
     {{else}}
-    ReturnErrorOnFailure(DataModel::Encode(writer, TLV::ContextTag(Fields::k{{asUpperCamelCase name}}), {{asLowerCamelCase name}}));
+    ReturnErrorOnFailure(DataModel::Encode(aWriter, TLV::ContextTag(Fields::k{{asUpperCamelCase name}}), {{asLowerCamelCase name}}));
     {{/if_is_fabric_scoped_struct}}
     {{/zcl_event_fields}}
-    ReturnErrorOnFailure(writer.EndContainer(outer));
+    ReturnErrorOnFailure(aWriter.EndContainer(outer));
     return CHIP_NO_ERROR;
 }
 

src/app/zap-templates/templates/app/cluster-objects.zapt

@@ -101,7 +101,7 @@ public:
     {{zapTypeToEncodableClusterObjectType type}} {{asLowerCamelCase label}}{{> cluster_objects_field_init}};
     {{/zcl_command_arguments}}
 
-    CHIP_ERROR Encode(TLV::TLVWriter &writer, TLV::Tag tag) const;
+    CHIP_ERROR Encode(TLV::TLVWriter & aWriter, TLV::Tag aTag) const;
 
     using ResponseType =
     {{~#if responseName}}
@@ -189,7 +189,7 @@ public:
     }
     {{/if}}
 
-    CHIP_ERROR Encode(TLV::TLVWriter &writer, TLV::Tag tag) const;
+    CHIP_ERROR Encode(TLV::TLVWriter & aWriter, TLV::Tag aTag) const;
 };
 
 struct DecodableType {