| #[macro_export] |
| macro_rules! enum_from_u32 { |
| ($(#[$attr:meta])* pub enum $name:ident { |
| $($(#[$var_attr:meta])* $variant:ident = $e:expr,)* |
| }) => { |
| $(#[$attr])* |
| pub enum $name { |
| $($(#[$var_attr])* $variant = $e),* |
| } |
| |
| impl $name { |
| pub fn from_u32(u: u32) -> Option<$name> { |
| $(if u == $name::$variant as u32 { |
| return Some($name::$variant) |
| })* |
| None |
| } |
| } |
| }; |
| ($(#[$attr:meta])* pub enum $name:ident { |
| $($(#[$var_attr:meta])* $variant:ident,)* |
| }) => { |
| $(#[$attr])* |
| pub enum $name { |
| $($(#[$var_attr])* $variant,)* |
| } |
| |
| impl $name { |
| pub fn from_u32(u: u32) -> Option<$name> { |
| $(if u == $name::$variant as u32 { |
| return Some($name::$variant) |
| })* |
| None |
| } |
| } |
| } |
| } |