feat: regex_valid return std::optional<wregex>

Author: MistEO

include/MaaUtils/Encoding.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include <optional>
+#include <regex>
 #include <string>
 #include <string_view>
 
@@ -11,6 +13,6 @@ MAA_NS_BEGIN
 MAA_UTILS_API std::wstring to_u16(std::string_view u8str);
 MAA_UTILS_API std::string from_u16(std::wstring_view u16str);
 
-MAA_UTILS_API bool regex_valid(const std::wstring& regex);
+MAA_UTILS_API std::optional<std::wregex> regex_valid(const std::wstring& regex);
 
 MAA_NS_END

source/Encoding/Encoding.cpp

@@ -141,16 +141,15 @@ std::string from_u16(std::wstring_view u16str)
     return output;
 }
 
-bool regex_valid(const std::wstring& regex)
+std::optional<std::wregex> regex_valid(const std::wstring& regex)
 {
     try {
-        std::wregex _(regex);
+        return std::wregex(regex);
     }
     catch (const std::regex_error& e) {
         LogError << e.what() << VAR(regex);
-        return false;
+        return std::nullopt;
     }
-    return true;
 }
 
 MAA_NS_END