47 lines
1.3 KiB
Rust
47 lines
1.3 KiB
Rust
|
// 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
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|