macro_rules! assert_matches {
($expression:expr, $( $pattern:pat )|+ $( if $guard:expr )?) => {
match $expression {
$( $pattern )|+ $( if $guard )? => {}
left => panic!(
"assertion failed: (left ~= right)\n left: `{:?}`\n right: `{}`",
left,
stringify!($($pattern)|+ $(if $guard)?)
),
}
}
}