konst/macros/bytes_fn_macros.rs
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macro_rules! impl_bytes_function {
(
strip_prefix;
left = $left:expr;
right = $right:expr;
on_error = $on_error:expr,
) => {
if $left.len() < $right.len() {
$on_error
}
loop {
match ($left, $right) {
([lb, rem_slice @ ..], [rb, rem_matched @ ..]) => {
$left = rem_slice;
$right = rem_matched;
if *lb != *rb {
$on_error
}
}
(rem, _) => {
$left = rem;
break;
}
}
}
};
(
strip_suffix;
left = $left:expr;
right = $right:expr;
on_error = $on_error:expr,
) => {
if $left.len() < $right.len() {
$on_error
}
loop {
match ($left, $right) {
([rem_slice @ .., lb], [rem_matched @ .., rb]) => {
$left = rem_slice;
$right = rem_matched;
if *lb != *rb {
$on_error
}
}
(rem, _) => {
$left = rem;
break;
}
}
}
};
}