Macro try_match::match_ok

macro_rules! match_ok {
    ($in:expr, $(|)? $($p:pat)|+ $(if $guard:expr)? => $out:expr $(,)?) => { ... };
    ($in:expr, $(|)? $($p:pat)|+ $(if $guard:expr)? $(,)?) => { ... };
    (, $($pattern_and_rest:tt)*) => { ... };
}

Try to match $in against a given pattern $p. Produces Some($out) if successful; None otherwise.

match_ok!($( $in:expr )?, $p:pat_multi $( if $guard:expr )? $( => $out:expr )? $( , )?)

=> $out can be left out, in which case it’s implied in the same way as try_match!.

$in can be left out to produce a closure (partial application).

See the crate-level documentation for examples.