Repeat string

src/value_visitors.h

@@ -688,6 +688,34 @@ struct BinaryMathOperation : BaseVisitor<>
         return ProcessStrings(left, nonstd::basic_string_view<CharT1>(rightStr));
     }
 
+    template<typename CharT>
+    InternalValue operator() (const std::basic_string<CharT> &left, int64_t right) const
+    {
+        return RepeatString(nonstd::basic_string_view<CharT>(left), right);
+    }
+
+    template<typename CharT>
+    InternalValue operator() (const nonstd::basic_string_view<CharT> &left, int64_t right) const
+    {
+        return RepeatString(left, right);
+    }
+
+    template<typename CharT>
+    InternalValue RepeatString(const nonstd::basic_string_view<CharT>& left, const int64_t right) const
+    {
+        using string = std::basic_string<CharT>;
+        InternalValue result;
+
+        if(m_oper == jinja2::BinaryExpression::Mul)
+        {
+            string str;
+            for (int i = 0; i < right; ++i)
+                str.append(left.begin(), left.end());
+            result = std::move(str);
+        }
+        return result;
+    }
+
     template<typename CharT>
     InternalValue ProcessStrings(const nonstd::basic_string_view<CharT>& left, const nonstd::basic_string_view<CharT>& right) const
     {

test/expressions_test.cpp

@@ -30,6 +30,11 @@ R"(
 {{ wstringValue + ' ' + wstringValue }}
 {{ stringValue + ' ' + stringValue }}
 {{ 'Hello' ~ " " ~ 123 ~ ' ' ~ 1.234 ~ " " ~ true ~ " " ~ intValue ~ " " ~ false ~ ' ' ~ 'World ' ~ stringValue  ~ ' ' ~ wstringValue}}
+{{ 'abc' * 0 }}
+{{ 'abc' * 1 }}
+{{ '123' * intValue }}
+{{ stringValue * intValue }}
+{{ wstringValue * intValue }}
 )",
 //-----------
 R"(
@@ -51,6 +56,11 @@ rain rain
 rain rain
 rain rain
 Hello 123 1.234 true 3 false World rain rain
+
+abc
+123123123
+rainrainrain
+rainrainrain
 )")
 {
     params = {