[clang] constexpr expression failed to resolve optimization

[Blaukovitch]

std::string new_string_after_operational = ResovleCharString("any_test_string"); //const char[]
where:

#define ResovleCharStringA(strAscii) \
    []() -> char* { \
        constexpr auto sizeAscii = sizeof(strAscii) / sizeof(strAscii[0]); \
        constexpr auto resovled_strAscii = class_operationAscii<sizeAscii>(strAscii); \
        static char after_operation_stringA[sizeAscii]; \
        operational_strA.operationAscii((unsigned char*)resovled_strA); \
        return after_operation_stringA; \
    }()

• CLANG - lot of trash dynamic operations when compiler is knowed original string length
• MS VC - complier dont use original string with strlen and strcopy operations before call operational_strA.operationAscii() and return already operation completed string.

this error is bypass in CLANG by next construction:

constexpr auto test = "any_test_string";
std::string new_string_after_operational = ResovleCharString(test);