xhj/embeded-gateway: 网关代码

xhj 4d99525703 first commit		6 月之前
..
preprocessed	4d99525703 first commit	6 月之前
bounds.hpp	4d99525703 first commit	6 月之前
conversion_traits.hpp	4d99525703 first commit	6 月之前
converter.hpp	4d99525703 first commit	6 月之前
int_float_mixture.hpp	4d99525703 first commit	6 月之前
is_subranged.hpp	4d99525703 first commit	6 月之前
meta.hpp	4d99525703 first commit	6 月之前
numeric_cast_traits.hpp	4d99525703 first commit	6 月之前
old_numeric_cast.hpp	4d99525703 first commit	6 月之前
sign_mixture.hpp	4d99525703 first commit	6 月之前
udt_builtin_mixture.hpp	4d99525703 first commit	6 月之前