SERVER-33065 CommandReplyBuilder and CommandInvocation

Revert "Revert "SERVER-33065 CommandReplyBuilder and CommandInvocation""
This reverts commit 74177edb35b6ce7594e4751051010ceade592484.
Leave out the unintentional repl/ change this time.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/mongo/bson/bsonobjbuilder.h b/src/mongo/bson/bsonobjbuilder.h
index 38dae8234fa..c8aed97e15b 100644
--- a/src/mongo/bson/bsonobjbuilder.h
+++ b/src/mongo/bson/bsonobjbuilder.h
@@ -172,6 +172,14 @@ public:
         }
     }
 
+    /**
+     * The start offset of the object being built by this builder within its buffer.
+     * Needed for the object-resuming constructor.
+     */
+    std::size_t offset() const {
+        return _offset;
+    }
+
     /** add all the fields from the object specified to this object */
     BSONObjBuilder& appendElements(const BSONObj& x);