rust-clippy/tests/ui/manual_map_option.fixed

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2021-01-10 14:46:03 +00:00
// run-rustfix
#![warn(clippy::manual_map)]
#![allow(clippy::no_effect, clippy::map_identity, clippy::unit_arg, clippy::match_ref_pats)]
fn main() {
Some(0).map(|_| 2);
Some(0).map(|x| x + 1);
Some("").map(|x| x.is_empty());
Some(0).map(|x| !x);
#[rustfmt::skip]
Some(0).map(std::convert::identity);
Some(&String::new()).map(|x| str::len(x));
match Some(0) {
Some(x) if false => Some(x + 1),
_ => None,
};
Some([0, 1]).as_ref().map(|x| x[0]);
Some(0).map(|x| x * 2);
Some(String::new()).as_ref().map(|x| x.is_empty());
Some(String::new()).as_ref().map(|x| x.len());
Some(0).map(|x| x + x);
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#[warn(clippy::option_map_unit_fn)]
match &mut Some(String::new()) {
Some(x) => Some(x.push_str("")),
None => None,
};
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#[allow(clippy::option_map_unit_fn)]
{
Some(String::new()).as_mut().map(|x| x.push_str(""));
}
Some(String::new()).as_ref().map(|x| x.len());
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Some(String::new()).as_ref().map(|x| x.is_empty());
Some((0, 1, 2)).map(|(x, y, z)| x + y + z);
Some([1, 2, 3]).map(|[first, ..]| first);
Some((String::new(), "test")).as_ref().map(|(x, y)| (y, x));
match Some((String::new(), 0)) {
Some((ref x, y)) => Some((y, x)),
None => None,
};
match Some(Some(0)) {
Some(Some(_)) | Some(None) => Some(0),
None => None,
};
match Some(Some((0, 1))) {
Some(Some((x, 1))) => Some(x),
_ => None,
};
}