add copy assignment operator

2 files changed, 29 insertions, 0 deletions

diff --git a/library/cpp/containers/compact_vector/compact_vector.h b/library/cpp/containers/compact_vector/compact_vector.h
index ff1e94e0247..0c6c563d71e 100644
--- a/library/cpp/containers/compact_vector/compact_vector.h
+++ b/library/cpp/containers/compact_vector/compact_vector.h
@@ -98,6 +98,14 @@ public:
         return *this;
     }
 
+    TThis& operator = (const TThis& that) {
+        if (Y_LIKELY(this != &that)) {
+            TThis tmp(that);
+            Swap(tmp);
+        }
+        return *this;
+    }
+
     TThis& operator = (std::initializer_list<T> init) {
         TThis data(init);
         Swap(data);
diff --git a/library/cpp/containers/compact_vector/compact_vector_ut.cpp b/library/cpp/containers/compact_vector/compact_vector_ut.cpp
index ed2936fb9e1..4dba7b2f49e 100644
--- a/library/cpp/containers/compact_vector/compact_vector_ut.cpp
+++ b/library/cpp/containers/compact_vector/compact_vector_ut.cpp
@@ -125,4 +125,25 @@ Y_UNIT_TEST_SUITE(TCompactVectorTest) {
         UNIT_ASSERT_VALUES_EQUAL("мыла", vector[1]);
         UNIT_ASSERT_VALUES_EQUAL("раму", vector[2]);
     }
+
+    Y_UNIT_TEST(TestCopyAssignmentOperator) {
+        TCompactVector<std::string> vector;
+        const TCompactVector<std::string> vector2 = {
+                "мама",
+                "мыла",
+                "раму"
+        };
+
+        vector = vector2;
+
+        UNIT_ASSERT_VALUES_EQUAL(3u, vector.Size());
+
+        UNIT_ASSERT_VALUES_EQUAL("мама", vector[0]);
+        UNIT_ASSERT_VALUES_EQUAL("мыла", vector[1]);
+        UNIT_ASSERT_VALUES_EQUAL("раму", vector[2]);
+
+        UNIT_ASSERT_VALUES_EQUAL(vector[0], vector2[0]);
+        UNIT_ASSERT_VALUES_EQUAL(vector[1], vector2[1]);
+        UNIT_ASSERT_VALUES_EQUAL(vector[2], vector2[2]);
+    }
 }