Function cpp_std::add_char32_t_u32_string

pub unsafe fn add_char32_t_u32_string(
    lhs: impl CastInto<Ptr<char32_t>>, 
    rhs: impl CastInto<Ref<U32String>>
) -> CppBox<U32String>

Calls C++ function: std::basic_string<char32_t, std::char_traits<char32_t>, std::allocator<char32_t>> std::operator+(const char32_t* __lhs, const std::basic_string<char32_t, std::char_traits<char32_t>, std::allocator<char32_t>>& __rhs).