simplification

include/ada/url_pattern_regex.h

@@ -24,7 +24,7 @@ concept regex_concept = requires(T t, std::string_view pattern,
   // Function to perform regex search
   {
     t.regex_search(input, std::declval<typename T::regex_type&>())
-  } -> std::same_as<std::optional<std::vector<std::string>>>;
+  } -> std::same_as<std::vector<std::string>>;
 
   // Function to match regex pattern
   {
@@ -44,7 +44,7 @@ class std_regex_provider {
   using regex_type = std::regex;
   static std::optional<regex_type> create_instance(std::string_view pattern,
                                                    bool ignore_case);
-  std::optional<std::vector<std::string>> regex_search(
+  std::vector<std::string> regex_search(
       std::string_view input, const regex_type& pattern);
   bool regex_match(std::string_view input, const regex_type& pattern);
 };

src/url_pattern_regex.cpp

@@ -19,11 +19,18 @@ std::optional<std::regex> std_regex_provider::create_instance(
   }
 }
 
-std::optional<std::vector<std::string>> std_regex_provider::regex_search(
+std::vector<std::string> std_regex_provider::regex_search(
     std::string_view input, const std::regex& pattern) {
-  (void)input;
-  (void)pattern;
-  return {};
+
+    std::vector<std::string> matches;
+    std::string input_str(input.begin(), input.end());  // Convert string_view to string for regex_search
+    std::smatch match_result;
+
+    while (std::regex_search(input_str, match_result, pattern)) {
+        matches.push_back(match_result.str());
+        input_str = match_result.suffix().str();
+    }
+    return matches;
 }
 
 bool std_regex_provider::regex_match(std::string_view input,