75 lines
1.6 KiB
Rust
75 lines
1.6 KiB
Rust
// run-rustfix
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#![warn(clippy::option_if_let_else)]
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fn bad1(string: Option<&str>) -> (bool, &str) {
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string.map_or((false, "hello"), |x| (true, x))
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}
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fn else_if_option(string: Option<&str>) -> Option<(bool, &str)> {
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if string.is_none() {
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None
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} else { string.map_or(Some((false, "")), |x| Some((true, x))) }
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}
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fn unop_bad(string: &Option<&str>, mut num: Option<i32>) {
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let _ = string.map_or(0, |s| s.len());
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let _ = num.as_ref().map_or(&0, |s| s);
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let _ = num.as_mut().map_or(&mut 0, |s| {
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*s += 1;
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s
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});
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let _ = num.as_ref().map_or(&0, |s| s);
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let _ = num.map_or(0, |mut s| {
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s += 1;
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s
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});
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let _ = num.as_mut().map_or(&mut 0, |s| {
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*s += 1;
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s
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});
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}
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fn longer_body(arg: Option<u32>) -> u32 {
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arg.map_or(13, |x| {
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let y = x * x;
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y * y
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})
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}
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fn test_map_or_else(arg: Option<u32>) {
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let _ = arg.map_or_else(|| {
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let mut y = 1;
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y = (y + 2 / y) / 2;
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y = (y + 2 / y) / 2;
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y
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}, |x| x * x * x * x);
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}
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fn negative_tests(arg: Option<u32>) -> u32 {
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let _ = if let Some(13) = arg { "unlucky" } else { "lucky" };
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for _ in 0..10 {
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let _ = if let Some(x) = arg {
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x
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} else {
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continue;
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};
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}
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let _ = if let Some(x) = arg {
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return x;
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} else {
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5
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};
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7
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}
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fn main() {
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let optional = Some(5);
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let _ = optional.map_or(5, |x| x + 2);
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let _ = bad1(None);
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let _ = else_if_option(None);
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unop_bad(&None, None);
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let _ = longer_body(None);
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test_map_or_else(None);
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let _ = negative_tests(None);
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}
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