rust-clippy/tests/ui/impl.rs

71 lines
1.4 KiB
Rust

#![allow(dead_code, clippy::extra_unused_lifetimes)]
#![warn(clippy::multiple_inherent_impl)]
struct MyStruct;
impl MyStruct {
fn first() {}
}
impl MyStruct {
//~^ ERROR: multiple implementations of this structure
fn second() {}
}
impl<'a> MyStruct {
fn lifetimed() {}
}
mod submod {
struct MyStruct;
impl MyStruct {
fn other() {}
}
impl super::MyStruct {
//~^ ERROR: multiple implementations of this structure
fn third() {}
}
}
use std::fmt;
impl fmt::Debug for MyStruct {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "MyStruct {{ }}")
}
}
// issue #5772
struct WithArgs<T>(T);
impl WithArgs<u32> {
fn f1() {}
}
impl WithArgs<u64> {
fn f2() {}
}
impl WithArgs<u64> {
//~^ ERROR: multiple implementations of this structure
fn f3() {}
}
// Ok, the struct is allowed to have multiple impls.
#[allow(clippy::multiple_inherent_impl)]
struct Allowed;
impl Allowed {}
impl Allowed {}
impl Allowed {}
struct AllowedImpl;
#[allow(clippy::multiple_inherent_impl)]
impl AllowedImpl {}
// Ok, the first block is skipped by this lint.
impl AllowedImpl {}
struct OneAllowedImpl;
impl OneAllowedImpl {}
#[allow(clippy::multiple_inherent_impl)]
impl OneAllowedImpl {}
impl OneAllowedImpl {} // Lint, only one of the three blocks is allowed.
//~^ ERROR: multiple implementations of this structure
fn main() {}