75 lines
1.3 KiB
Rust
75 lines
1.3 KiB
Rust
#![warn(clippy::partialeq_to_none)]
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#![allow(clippy::eq_op, clippy::needless_if)]
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struct Foobar;
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impl PartialEq<Option<()>> for Foobar {
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fn eq(&self, _: &Option<()>) -> bool {
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false
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}
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}
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#[allow(dead_code)]
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fn foo(f: Option<u32>) -> &'static str {
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if f.is_some() { "yay" } else { "nay" }
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}
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fn foobar() -> Option<()> {
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None
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}
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fn bar() -> Result<(), ()> {
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Ok(())
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}
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fn optref() -> &'static &'static Option<()> {
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&&None
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}
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pub fn macro_expansion() {
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macro_rules! foo {
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() => {
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None::<()>
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};
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}
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let _ = foobar() == foo!();
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let _ = foo!() == foobar();
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let _ = foo!() == foo!();
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}
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fn main() {
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let x = Some(0);
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let _ = x.is_none();
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let _ = x.is_some();
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let _ = x.is_none();
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let _ = x.is_some();
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if foobar().is_none() {}
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if bar().ok().is_some() {}
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let _ = Some(1 + 2).is_some();
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let _ = { Some(0) }.is_none();
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let _ = {
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/*
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This comment runs long
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*/
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Some(1)
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}.is_some();
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// Should not trigger, as `Foobar` is not an `Option` and has no `is_none`
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let _ = Foobar == None;
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let _ = optref().is_none();
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let _ = optref().is_some();
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let _ = optref().is_none();
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let _ = optref().is_some();
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let x = Box::new(Option::<()>::None);
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let _ = (*x).is_some();
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}
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