rust/tests/ui/to_string_in_display.rs
2020-08-14 21:38:11 +09:00

55 lines
799 B
Rust

#![warn(clippy::to_string_in_display)]
#![allow(clippy::inherent_to_string_shadow_display)]
use std::fmt;
struct A;
impl A {
fn fmt(&self) {
self.to_string();
}
}
trait B {
fn fmt(&self) {}
}
impl B for A {
fn fmt(&self) {
self.to_string();
}
}
impl fmt::Display for A {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.to_string())
}
}
fn fmt(a: A) {
a.to_string();
}
struct C;
impl C {
fn to_string(&self) -> String {
String::from("I am C")
}
}
impl fmt::Display for C {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.to_string())
}
}
fn main() {
let a = A;
a.to_string();
a.fmt();
fmt(a);
let c = C;
c.to_string();
}