Macro each

macro_rules! each {
    (
            $repr:expr,
            UTC => $utc:expr,
            UNKNOWN => $unknown:expr,
            FIXED($offset:ident) => $fixed:expr,
            STATIC_TZIF($static_tzif:ident) => $static_tzif_block:expr,
            ARC_TZIF($arc_tzif:ident) => $arc_tzif_block:expr,
            ARC_POSIX($arc_posix:ident) => $arc_posix_block:expr,
        ) => { ... };
}

A macro for “matching” over the time zone representation variants.

This macro is safe to use.

Note that the ARC_TZIF and ARC_POSIX branches are automatically removed when alloc isn’t enabled. Users of this macro needn’t handle the cfg themselves.