linuxvideo 0.3.5

V4L2 video capture and output library
Documentation 
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/// ffi_enum! {}
macro_rules! ffi_enum {
    (
        $( #[$attrs:meta] )*
        $v:vis enum $name:ident: $native:ty {
            $(
                $( #[$variant_attrs:meta] )*
                $variant:ident = $value:expr
            ),+
            $(,)?
        }
    ) => {
        $( #[$attrs] )*
        #[derive(Clone, Copy, PartialEq, Eq)]
        #[repr(transparent)]
        $v struct $name(pub(crate) $native);

        impl $name {
            $(
                $( #[$variant_attrs] )*
                $v const $variant: Self = Self($value);
            )+
        }

        #[allow(unreachable_patterns)]
        impl std::fmt::Debug for $name {
            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                match *self {
                    $(
                        Self::$variant => f.write_str(stringify!($variant)),
                    )+

                    _ => write!(f, "(unknown: {:#x})", self.0),
                }
            }
        }
    };
}