Function construct

include/covscript/core/variable.hpp:548–553

			}
			template <typename... ArgsT>
			static COVSCRIPT_ALWAYS_INLINE void construct(basic_var *val, ArgsT &&...args)
			{
				T *ptr = get_allocator().allocate(1);
				::new (ptr) T(std::forward<ArgsT>(args)...);
				val->m_store.ptr = ptr;
			}
			static inline operators::result dispatcher(operators::type op, const basic_var *lhs, void *rhs)
			{
				using handler_t = operators::result (*)(void *, void *);