SERVER-19510 Refactor $text match expression parsing

- Text parsing no longer uses dedicated callback handle;
  responsibility moved to ExtensionsCallback.
- Introduces TextMatchExpressionBase (new base class for existing
  class TextMatchExpression and new class TextNoOpMatchExpression).

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mongo/db/exec/projection.h b/src/mongo/db/exec/projection.h
index 389abcc2123..87a3f97a2fd 100644
--- a/src/mongo/db/exec/projection.h
+++ b/src/mongo/db/exec/projection.h
@@ -66,7 +66,7 @@ struct ProjectionStageParams {
     // from.  Otherwise, this field is ignored.
     BSONObj coveredKeyObj;
 
-    // Used for creating context for the $where clause processing. Not owned.
+    // Used for creating context for the match extensions processing. Not owned.
     const MatchExpressionParser::ExtensionsCallback* extensionsCallback;
 };