Macro declare_new_int 

macro_rules! declare_new_int {
    (
    $(#[$struct_meta:meta])*
    $struct_vis:vis struct $struct_name:ident($struct_ty:ty);
    $(#[$err_meta:meta])*
    $err_vis:vis type RangeError = $err_name:ident;
    const BOUNDS = $bounds:expr;
    $(
      type SqlType = $sql_ty:ty;
      const SQL_NAME = $sql_name:literal;
    )?
  ) => { ... };
    (@impl_sqlx($struct_name:ident, $sql_ty:ty, $sql_name:literal)) => { ... };
}