Do not allow multiplication of TString and pointer

1 files changed, 13 insertions, 0 deletions

diff --git a/util/generic/string.h b/util/generic/string.h
index 3aadb2159bb..b03b7f76259 100644
--- a/util/generic/string.h
+++ b/util/generic/string.h
@@ -7,6 +7,7 @@
 #include <stdexcept>
 #include <string>
 #include <string_view>
+#include <type_traits>
 
 #include <util/system/compiler.h>
 #include <util/system/yassert.h>
@@ -814,8 +815,14 @@ public:
 
     template <class T>
     friend TBasicString operator*(const TBasicString& s, T count) {
+        static_assert(std::is_integral<T>::value, "Integral type required.");
+
         TBasicString result;
 
+        if (count > 0) {
+            result.reserve(s.length() * count);
+        }
+
         for (T i = 0; i < count; ++i) {
             result += s;
         }
@@ -825,8 +832,14 @@ public:
 
     template <class T>
     TBasicString& operator*=(T count) {
+        static_assert(std::is_integral<T>::value, "Integral type required.");
+
         TBasicString temp;
 
+        if (count > 0) {
+            temp.reserve(length() * count);
+        }
+
         for (T i = 0; i < count; ++i) {
             temp += *this;
         }