1 files changed, 21 insertions, 0 deletions
diff --git a/src/mongo/db/field_ref_set.cpp b/src/mongo/db/field_ref_set.cpp
index c55a722b64b..3b98f049448 100644
--- a/src/mongo/db/field_ref_set.cpp
+++ b/src/mongo/db/field_ref_set.cpp
@@ -60,6 +60,14 @@ bool FieldRefSet::FieldRefPtrLessThan::operator()(const FieldRef* l, const Field
 
 FieldRefSet::FieldRefSet() {}
 
+FieldRefSet::FieldRefSet(const std::vector<std::unique_ptr<FieldRef>>& paths) {
+    fillFrom(paths);
+}
+
+FieldRefSet::FieldRefSet(const vector<const FieldRef*>& paths) {
+    _fieldSet.insert(paths.begin(), paths.end());
+}
+
 FieldRefSet::FieldRefSet(const vector<FieldRef*>& paths) {
     fillFrom(paths);
 }
@@ -105,6 +113,19 @@ void FieldRefSet::fillFrom(const std::vector<FieldRef*>& fields) {
     _fieldSet.insert(fields.begin(), fields.end());
 }
 
+void FieldRefSet::fillFrom(const std::vector<std::unique_ptr<FieldRef>>& fields) {
+    dassert(_fieldSet.empty());
+    std::transform(fields.begin(),
+                   fields.end(),
+                   std::inserter(_fieldSet, _fieldSet.begin()),
+                   [](const auto& field) { return field.get(); });
+}
+
+bool FieldRefSet::insertNoConflict(const FieldRef* toInsert) {
+    const FieldRef* conflict;
+    return insert(toInsert, &conflict);
+}
+
 bool FieldRefSet::insert(const FieldRef* toInsert, const FieldRef** conflict) {
     // We can determine if two fields conflict by checking their common prefix.
     //