Eliminate warnings

Author: vpiotr

include/ustr/ustr.h

@@ -445,14 +445,9 @@ inline std::string tuple_to_string_impl(const Tuple& tuple, index_sequence<Indic
     std::ostringstream ss;
     ss << "(";
     bool first = true;
-    // C++11 compatible element processing using recursive template expansion
-    auto process_elements = [&ss, &first](const std::string& element) {
-        if (!first) ss << ", ";
-        first = false;
-        ss << element;
-    };
     // Use initializer list expansion for C++11 compatibility with quotation support
-    (void)std::initializer_list<int>{(process_elements(apply_quotation_if_needed(std::get<Indices>(tuple))), 0)...};
+    (void)std::initializer_list<int>{((first ? (first = false, ss) : (ss << ", ")) << apply_quotation_if_needed(std::get<Indices>(tuple)), 0)...};
+    (void)first; // Suppress unused variable warning for empty tuples
     ss << ")";
     return ss.str();
 }

include/utest/utest.h

@@ -268,7 +268,7 @@ namespace details {
   inline std::string to_string_for_str_assert(const char* s) { return std::string(s); }
   inline std::string to_string_for_str_assert(char* s) { return std::string(s); }
   inline std::string to_string_for_str_assert(const std::wstring& s) { return std::string(s.begin(), s.end()); }
-  inline std::string to_string_for_str_assert(const wchar_t* s) { return std::string(); } // Not implemented
+  inline std::string to_string_for_str_assert(const wchar_t* /*s*/) { return std::string(); } // Not implemented
   template<typename T>
   inline std::string to_string_for_str_assert(const T& s) { return convertToString(s); }
 

tests/ustr_quoted_str_test.cpp

@@ -180,7 +180,7 @@ UTEST_FUNC_DEF2(QuotedStr, StartEndDelimitersComplex) {
 
 // Tests for is_utf8 parameter
 UTEST_FUNC_DEF2(QuotedStr, UTF8Enabled) {
-    std::string result = ustr::quoted_str("Hello 世界! 🌍", '"', '"', '\\\\', true);
+    std::string result = ustr::quoted_str("Hello 世界! 🌍", '"', '"', '\\', true);
     UTEST_ASSERT_STR_EQUALS(result, "\"Hello 世界! 🌍\"");
 }