Make all non-user-creatable structures non-comparable (#802)

This change makes all non-user-creatable structures non-comparable. This
makes it easier to add changes later that don't introduce breaking
changes from the go compatibility guarantees perspective.

This, of course, implies that this change _is_ a breaking change, but since
these structures are not intended to be created by users (or de-referenced),
it should be okay.

1 files changed, 2 insertions, 0 deletions

diff --git a/tag.go b/tag.go
index dd8477a..9ced680 100644
--- a/tag.go
+++ b/tag.go
@@ -13,6 +13,7 @@ import (
 
 // Tag
 type Tag struct {
+	doNotCompare
 	Object
 	cast_ptr *C.git_tag
 }
@@ -64,6 +65,7 @@ func (t *Tag) TargetType() ObjectType {
 }
 
 type TagsCollection struct {
+	doNotCompare
 	repo *Repository
 }