1 /// Type size assertion. The first argument is a type and the second argument is its expected size.
3 macro_rules! static_assert_size {
4 ($ty:ty, $size:expr) => {
5 const _: [(); $size] = [(); ::std::mem::size_of::<$ty>()];
10 macro_rules! enum_from_u32 {
11 ($(#[$attr:meta])* pub enum $name:ident {
12 $($(#[$var_attr:meta])* $variant:ident = $e:expr,)*
16 $($(#[$var_attr])* $variant = $e),*
20 pub fn from_u32(u: u32) -> Option<$name> {
21 $(if u == $name::$variant as u32 {
22 return Some($name::$variant)
28 ($(#[$attr:meta])* pub enum $name:ident {
29 $($(#[$var_attr:meta])* $variant:ident,)*
33 $($(#[$var_attr])* $variant,)*
37 pub fn from_u32(u: u32) -> Option<$name> {
38 $(if u == $name::$variant as u32 {
39 return Some($name::$variant)