Split match_single_binding
tests in 2 files (too many lines for CI)
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@ -115,33 +115,4 @@ fn main() {
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// =>
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_ => println!("Not an array index start"),
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}
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// Lint (additional curly braces needed, see #6572)
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struct AppendIter<I>
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where
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I: Iterator,
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{
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inner: Option<(I, <I as Iterator>::Item)>,
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}
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#[allow(dead_code)]
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fn size_hint<I: Iterator>(iter: &AppendIter<I>) -> (usize, Option<usize>) {
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match &iter.inner {
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Some((iter, _item)) => {
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let (min, max) = iter.size_hint();
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(min.saturating_add(1), max.and_then(|max| max.checked_add(1)))
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},
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None => (0, Some(0)),
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}
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}
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// Lint (no additional curly braces needed)
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let opt = Some((5, 2));
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let get_tup = || -> (i32, i32) { (1, 2) };
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match opt {
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#[rustfmt::skip]
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Some((first, _second)) => {
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let (a, b) = get_tup();
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println!("a {:?} and b {:?}", a, b);
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},
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None => println!("nothing"),
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}
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}
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@ -132,33 +132,4 @@ fn main() {
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// =>
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_ => println!("Not an array index start"),
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}
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// Lint (additional curly braces needed, see #6572)
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struct AppendIter<I>
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where
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I: Iterator,
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{
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inner: Option<(I, <I as Iterator>::Item)>,
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}
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#[allow(dead_code)]
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fn size_hint<I: Iterator>(iter: &AppendIter<I>) -> (usize, Option<usize>) {
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match &iter.inner {
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Some((iter, _item)) => match iter.size_hint() {
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(min, max) => (min.saturating_add(1), max.and_then(|max| max.checked_add(1))),
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},
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None => (0, Some(0)),
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}
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}
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// Lint (no additional curly braces needed)
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let opt = Some((5, 2));
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let get_tup = || -> (i32, i32) { (1, 2) };
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match opt {
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#[rustfmt::skip]
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Some((first, _second)) => {
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match get_tup() {
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(a, b) => println!("a {:?} and b {:?}", a, b),
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}
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},
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None => println!("nothing"),
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}
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}
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@ -178,36 +178,5 @@ LL | | _ => println!("Single branch"),
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LL | | }
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| |_____^ help: consider using the match body instead: `println!("Single branch");`
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error: this match could be written as a `let` statement
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--> $DIR/match_single_binding.rs:146:36
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LL | Some((iter, _item)) => match iter.size_hint() {
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| ____________________________________^
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LL | | (min, max) => (min.saturating_add(1), max.and_then(|max| max.checked_add(1))),
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LL | | },
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| |_____________^
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help: consider using `let` statement
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LL | Some((iter, _item)) => {
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LL | let (min, max) = iter.size_hint();
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LL | (min.saturating_add(1), max.and_then(|max| max.checked_add(1)))
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LL | },
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error: this match could be written as a `let` statement
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--> $DIR/match_single_binding.rs:158:13
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LL | / match get_tup() {
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LL | | (a, b) => println!("a {:?} and b {:?}", a, b),
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LL | | }
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| |_____________^
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help: consider using `let` statement
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LL | let (a, b) = get_tup();
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LL | println!("a {:?} and b {:?}", a, b);
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error: aborting due to 14 previous errors
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error: aborting due to 12 previous errors
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37
tests/ui/match_single_binding2.fixed
Normal file
37
tests/ui/match_single_binding2.fixed
Normal file
@ -0,0 +1,37 @@
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// run-rustfix
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#![warn(clippy::match_single_binding)]
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#![allow(unused_variables)]
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fn main() {
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// Lint (additional curly braces needed, see #6572)
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struct AppendIter<I>
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where
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I: Iterator,
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{
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inner: Option<(I, <I as Iterator>::Item)>,
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}
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#[allow(dead_code)]
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fn size_hint<I: Iterator>(iter: &AppendIter<I>) -> (usize, Option<usize>) {
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match &iter.inner {
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Some((iter, _item)) => {
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let (min, max) = iter.size_hint();
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(min.saturating_add(1), max.and_then(|max| max.checked_add(1)))
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},
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None => (0, Some(0)),
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}
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}
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// Lint (no additional curly braces needed)
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let opt = Some((5, 2));
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let get_tup = || -> (i32, i32) { (1, 2) };
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match opt {
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#[rustfmt::skip]
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Some((first, _second)) => {
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let (a, b) = get_tup();
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println!("a {:?} and b {:?}", a, b);
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},
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None => println!("nothing"),
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}
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}
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37
tests/ui/match_single_binding2.rs
Normal file
37
tests/ui/match_single_binding2.rs
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@ -0,0 +1,37 @@
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// run-rustfix
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#![warn(clippy::match_single_binding)]
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#![allow(unused_variables)]
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fn main() {
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// Lint (additional curly braces needed, see #6572)
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struct AppendIter<I>
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where
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I: Iterator,
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{
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inner: Option<(I, <I as Iterator>::Item)>,
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}
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#[allow(dead_code)]
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fn size_hint<I: Iterator>(iter: &AppendIter<I>) -> (usize, Option<usize>) {
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match &iter.inner {
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Some((iter, _item)) => match iter.size_hint() {
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(min, max) => (min.saturating_add(1), max.and_then(|max| max.checked_add(1))),
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},
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None => (0, Some(0)),
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}
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}
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// Lint (no additional curly braces needed)
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let opt = Some((5, 2));
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let get_tup = || -> (i32, i32) { (1, 2) };
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match opt {
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#[rustfmt::skip]
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Some((first, _second)) => {
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match get_tup() {
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(a, b) => println!("a {:?} and b {:?}", a, b),
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}
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},
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None => println!("nothing"),
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}
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}
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34
tests/ui/match_single_binding2.stderr
Normal file
34
tests/ui/match_single_binding2.stderr
Normal file
@ -0,0 +1,34 @@
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error: this match could be written as a `let` statement
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--> $DIR/match_single_binding2.rs:18:36
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LL | Some((iter, _item)) => match iter.size_hint() {
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| ____________________________________^
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LL | | (min, max) => (min.saturating_add(1), max.and_then(|max| max.checked_add(1))),
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LL | | },
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| |_____________^
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= note: `-D clippy::match-single-binding` implied by `-D warnings`
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help: consider using `let` statement
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LL | Some((iter, _item)) => {
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LL | let (min, max) = iter.size_hint();
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LL | (min.saturating_add(1), max.and_then(|max| max.checked_add(1)))
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LL | },
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error: this match could be written as a `let` statement
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--> $DIR/match_single_binding2.rs:31:13
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LL | / match get_tup() {
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LL | | (a, b) => println!("a {:?} and b {:?}", a, b),
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LL | | }
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| |_____________^
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help: consider using `let` statement
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LL | let (a, b) = get_tup();
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LL | println!("a {:?} and b {:?}", a, b);
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error: aborting due to 2 previous errors
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