1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 macro_rules! enum_from_u32 {
12 ($(#[$attr:meta])* pub enum $name:ident {
13 $($variant:ident = $e:expr,)*
21 pub fn from_u32(u: u32) -> Option<$name> {
22 $(if u == $name::$variant as u32 {
23 return Some($name::$variant)
29 ($(#[$attr:meta])* pub enum $name:ident {
38 pub fn from_u32(u: u32) -> Option<$name> {
39 $(if u == $name::$variant as u32 {
40 return Some($name::$variant)