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//@ check-pass
//@ edition:2021
struct Cat;
struct Wrap<T>(T);
fn main() {
impl From<Cat> for () {
//~^ WARN non-local `impl` definition
fn from(_: Cat) -> () {
todo!()
}
}
#[derive(Debug)]
struct Elephant;
impl From<Wrap<Wrap<Elephant>>> for () {
fn from(_: Wrap<Wrap<Elephant>>) -> Self {
todo!()
}
}
}
pub trait StillNonLocal {}
impl StillNonLocal for &str {}
fn only_global() {
struct Foo;
impl StillNonLocal for &Foo {}
}
struct GlobalSameFunction;
fn same_function() {
struct Local1(GlobalSameFunction);
impl From<Local1> for GlobalSameFunction {
fn from(x: Local1) -> GlobalSameFunction {
x.0
}
}
struct Local2(GlobalSameFunction);
impl From<Local2> for GlobalSameFunction {
fn from(x: Local2) -> GlobalSameFunction {
x.0
}
}
}
struct GlobalDifferentFunction;
fn diff_function_1() {
struct Local(GlobalDifferentFunction);
impl From<Local> for GlobalDifferentFunction {
fn from(x: Local) -> GlobalDifferentFunction {
x.0
}
}
}
fn diff_function_2() {
struct Local(GlobalDifferentFunction);
impl From<Local> for GlobalDifferentFunction {
fn from(x: Local) -> GlobalDifferentFunction {
x.0
}
}
}
// https://github.com/rust-lang/rust/issues/121621#issuecomment-1976826895
fn commonly_reported() {
struct Local(u8);
impl From<Local> for u8 {
fn from(x: Local) -> u8 {
x.0
}
}
}
// https://github.com/rust-lang/rust/issues/121621#issue-2153187542
pub trait Serde {}
impl Serde for &[u8] {}
impl Serde for &str {}
fn serde() {
struct Thing;
impl Serde for &Thing {}
}
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