mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-12-05 02:50:32 +00:00
96 lines
1.8 KiB
Rust
96 lines
1.8 KiB
Rust
#![warn(clippy::inherent_to_string)]
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#![deny(clippy::inherent_to_string_shadow_display)]
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#![allow(clippy::many_single_char_names)]
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use std::fmt;
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trait FalsePositive {
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fn to_string(&self) -> String;
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}
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struct A;
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struct B;
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struct C;
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struct D;
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struct E;
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struct F;
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impl A {
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// Should be detected; emit warning
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fn to_string(&self) -> String {
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"A.to_string()".to_string()
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}
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// Should not be detected as it does not match the function signature
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fn to_str(&self) -> String {
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"A.to_str()".to_string()
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}
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}
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// Should not be detected as it is a free function
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fn to_string() -> String {
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"free to_string()".to_string()
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}
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impl B {
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// Should not be detected, wrong return type
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fn to_string(&self) -> i32 {
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42
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}
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}
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impl C {
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// Should be detected and emit error as C also implements Display
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fn to_string(&self) -> String {
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"C.to_string()".to_string()
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}
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}
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impl fmt::Display for C {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "impl Display for C")
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}
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}
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impl FalsePositive for D {
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// Should not be detected, as it is a trait function
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fn to_string(&self) -> String {
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"impl FalsePositive for D".to_string()
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}
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}
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impl E {
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// Should not be detected, as it is not bound to an instance
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fn to_string() -> String {
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"E::to_string()".to_string()
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}
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}
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impl F {
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// Should not be detected, as it does not match the function signature
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fn to_string(&self, _i: i32) -> String {
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"F.to_string()".to_string()
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}
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}
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fn main() {
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let a = A;
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a.to_string();
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a.to_str();
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to_string();
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let b = B;
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b.to_string();
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let c = C;
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C.to_string();
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let d = D;
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d.to_string();
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E::to_string();
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let f = F;
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f.to_string(1);
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}
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