SERVER-23816 Add $sortByCount aggregation stage

1 files changed, 4 insertions, 2 deletions

diff --git a/src/mongo/db/pipeline/document_source.cpp b/src/mongo/db/pipeline/document_source.cpp
index 33e85baa380..430e3cf1496 100644
--- a/src/mongo/db/pipeline/document_source.cpp
+++ b/src/mongo/db/pipeline/document_source.cpp
@@ -56,8 +56,8 @@ void DocumentSource::registerParser(string name, Parser parser) {
     parserMap[name] = parser;
 }
 
-intrusive_ptr<DocumentSource> DocumentSource::parse(const intrusive_ptr<ExpressionContext> expCtx,
-                                                    BSONObj stageObj) {
+vector<intrusive_ptr<DocumentSource>> DocumentSource::parse(
+    const intrusive_ptr<ExpressionContext> expCtx, BSONObj stageObj) {
     uassert(16435,
             "A pipeline stage specification object must contain exactly one field.",
             stageObj.nFields() == 1);
@@ -66,9 +66,11 @@ intrusive_ptr<DocumentSource> DocumentSource::parse(const intrusive_ptr<Expressi
 
     // Get the registered parser and call that.
     auto it = parserMap.find(stageName);
+
     uassert(16436,
             str::stream() << "Unrecognized pipeline stage name: '" << stageName << "'",
             it != parserMap.end());
+
     return it->second(stageSpec, expCtx);
 }