112 lines
2.6 KiB
Rust
112 lines
2.6 KiB
Rust
// run-rustfix
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#![allow(unused, clippy::diverging_sub_expression)]
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#![warn(clippy::nonminimal_bool)]
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fn methods_with_negation() {
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let a: Option<i32> = unimplemented!();
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let b: Result<i32, i32> = unimplemented!();
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let _ = a.is_some();
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let _ = !a.is_some();
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let _ = a.is_none();
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let _ = !a.is_none();
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let _ = b.is_err();
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let _ = !b.is_err();
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let _ = b.is_ok();
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let _ = !b.is_ok();
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let c = false;
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let _ = !(a.is_some() && !c);
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let _ = !(a.is_some() || !c);
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let _ = !(!c ^ c) || !a.is_some();
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let _ = (!c ^ c) || !a.is_some();
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let _ = !c ^ c || !a.is_some();
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}
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// Simplified versions of https://github.com/rust-lang/rust-clippy/issues/2638
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// clippy::nonminimal_bool should only check the built-in Result and Some type, not
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// any other types like the following.
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enum CustomResultOk<E> {
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Ok,
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Err(E),
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}
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enum CustomResultErr<E> {
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Ok,
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Err(E),
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}
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enum CustomSomeSome<T> {
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Some(T),
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None,
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}
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enum CustomSomeNone<T> {
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Some(T),
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None,
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}
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impl<E> CustomResultOk<E> {
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pub fn is_ok(&self) -> bool {
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true
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}
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}
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impl<E> CustomResultErr<E> {
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pub fn is_err(&self) -> bool {
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true
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}
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}
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impl<T> CustomSomeSome<T> {
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pub fn is_some(&self) -> bool {
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true
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}
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}
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impl<T> CustomSomeNone<T> {
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pub fn is_none(&self) -> bool {
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true
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}
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}
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fn dont_warn_for_custom_methods_with_negation() {
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let res = CustomResultOk::Err("Error");
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// Should not warn and suggest 'is_err()' because the type does not
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// implement is_err().
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if !res.is_ok() {}
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let res = CustomResultErr::Err("Error");
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// Should not warn and suggest 'is_ok()' because the type does not
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// implement is_ok().
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if !res.is_err() {}
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let res = CustomSomeSome::Some("thing");
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// Should not warn and suggest 'is_none()' because the type does not
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// implement is_none().
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if !res.is_some() {}
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let res = CustomSomeNone::Some("thing");
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// Should not warn and suggest 'is_some()' because the type does not
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// implement is_some().
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if !res.is_none() {}
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}
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// Only Built-in Result and Some types should suggest the negated alternative
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fn warn_for_built_in_methods_with_negation() {
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let res: Result<usize, usize> = Ok(1);
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if !res.is_ok() {}
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if !res.is_err() {}
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let res = Some(1);
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if !res.is_some() {}
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if !res.is_none() {}
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}
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#[allow(clippy::neg_cmp_op_on_partial_ord)]
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fn dont_warn_for_negated_partial_ord_comparison() {
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let a: f64 = unimplemented!();
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let b: f64 = unimplemented!();
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let _ = !(a < b);
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let _ = !(a <= b);
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let _ = !(a > b);
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let _ = !(a >= b);
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}
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fn main() {}
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