Macro jxl_bitstream::expand_u32

macro_rules! expand_u32 {
    ($bitstream:ident; $($rest:tt)*) => { ... };
    (@expand $bitstream:ident, $selector:ident, $counter:expr;) => { ... };
    (@expand $bitstream:ident, $selector:ident, $counter:expr; $c:literal, $($rest:tt)*) => { ... };
    (@expand $bitstream:ident, $selector:ident, $counter:expr; u($n:literal), $($rest:tt)*) => { ... };
    (@expand $bitstream:ident, $selector:ident, $counter:expr; $c:literal + u($n:literal), $($rest:tt)*) => { ... };
}