| // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| macro_rules! enum_from_u32 { |
| ($(#[$attr:meta])* pub enum $name:ident { |
| $($variant:ident = $e:expr,)* |
| }) => { |
| $(#[$attr])* |
| pub enum $name { |
| $($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 { |
| $($variant:ident,)* |
| }) => { |
| $(#[$attr])* |
| pub enum $name { |
| $($variant,)* |
| } |
| |
| impl $name { |
| pub fn from_u32(u: u32) -> Option<$name> { |
| $(if u == $name::$variant as u32 { |
| return Some($name::$variant) |
| })* |
| None |
| } |
| } |
| } |
| } |