146 lines
2.3 KiB
Rust
146 lines
2.3 KiB
Rust
#![warn(clippy::len_without_is_empty)]
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#![allow(dead_code, unused)]
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pub struct PubOne;
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impl PubOne {
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pub fn len(&self) -> isize {
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1
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}
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}
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impl PubOne {
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// A second impl for this struct -- the error span shouldn't mention this.
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pub fn irrelevant(&self) -> bool {
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false
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}
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}
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// Identical to `PubOne`, but with an `allow` attribute on the impl complaining `len`.
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pub struct PubAllowed;
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#[allow(clippy::len_without_is_empty)]
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impl PubAllowed {
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pub fn len(&self) -> isize {
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1
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}
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}
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// No `allow` attribute on this impl block, but that doesn't matter -- we only require one on the
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// impl containing `len`.
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impl PubAllowed {
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pub fn irrelevant(&self) -> bool {
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false
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}
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}
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pub trait PubTraitsToo {
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fn len(&self) -> isize;
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}
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impl PubTraitsToo for One {
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fn len(&self) -> isize {
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0
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}
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}
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pub struct HasIsEmpty;
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impl HasIsEmpty {
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pub fn len(&self) -> isize {
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1
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}
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fn is_empty(&self) -> bool {
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false
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}
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}
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pub struct HasWrongIsEmpty;
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impl HasWrongIsEmpty {
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pub fn len(&self) -> isize {
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1
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}
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pub fn is_empty(&self, x: u32) -> bool {
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false
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}
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}
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struct NotPubOne;
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impl NotPubOne {
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pub fn len(&self) -> isize {
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// No error; `len` is pub but `NotPubOne` is not exported anyway.
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1
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}
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}
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struct One;
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impl One {
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fn len(&self) -> isize {
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// No error; `len` is private; see issue #1085.
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1
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}
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}
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trait TraitsToo {
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fn len(&self) -> isize;
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// No error; `len` is private; see issue #1085.
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}
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impl TraitsToo for One {
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fn len(&self) -> isize {
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0
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}
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}
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struct HasPrivateIsEmpty;
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impl HasPrivateIsEmpty {
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pub fn len(&self) -> isize {
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1
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}
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fn is_empty(&self) -> bool {
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false
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}
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}
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struct Wither;
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pub trait WithIsEmpty {
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fn len(&self) -> isize;
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fn is_empty(&self) -> bool;
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}
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impl WithIsEmpty for Wither {
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fn len(&self) -> isize {
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1
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}
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fn is_empty(&self) -> bool {
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false
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}
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}
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pub trait Empty {
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fn is_empty(&self) -> bool;
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}
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pub trait InheritingEmpty: Empty {
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// Must not trigger `LEN_WITHOUT_IS_EMPTY`.
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fn len(&self) -> isize;
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}
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// This used to ICE.
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pub trait Foo: Sized {}
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pub trait DependsOnFoo: Foo {
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fn len(&mut self) -> usize;
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}
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fn main() {}
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