67 lines
1.5 KiB
Rust
67 lines
1.5 KiB
Rust
#![warn(clippy::if_then_some_else_none)]
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fn main() {
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// Should issue an error.
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let _ = if foo() {
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println!("true!");
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Some("foo")
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} else {
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None
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};
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// Should not issue an error since the `else` block has a statement besides `None`.
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let _ = if foo() {
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println!("true!");
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Some("foo")
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} else {
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eprintln!("false...");
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None
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};
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// Should not issue an error since there are more than 2 blocks in the if-else chain.
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let _ = if foo() {
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println!("foo true!");
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Some("foo")
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} else if bar() {
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println!("bar true!");
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Some("bar")
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} else {
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None
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};
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let _ = if foo() {
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println!("foo true!");
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Some("foo")
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} else {
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bar().then(|| {
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println!("bar true!");
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"bar"
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})
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};
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// Should not issue an error since the `then` block has `None`, not `Some`.
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let _ = if foo() { None } else { Some("foo is false") };
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// Should not issue an error since the `else` block doesn't use `None` directly.
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let _ = if foo() { Some("foo is true") } else { into_none() };
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// Should not issue an error since the `then` block doesn't use `Some` directly.
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let _ = if foo() { into_some("foo") } else { None };
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}
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fn foo() -> bool {
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unimplemented!()
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}
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fn bar() -> bool {
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unimplemented!()
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}
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fn into_some<T>(v: T) -> Option<T> {
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Some(v)
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}
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fn into_none<T>() -> Option<T> {
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None
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}
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