mirror of https://github.com/rust-lang/rust
104 lines
2.2 KiB
Rust
104 lines
2.2 KiB
Rust
//@ check-pass
|
|
//@ edition:2021
|
|
|
|
#![warn(non_local_definitions)]
|
|
|
|
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 () {
|
|
//~^ WARN non-local `impl` definition
|
|
fn from(_: Wrap<Wrap<Elephant>>) -> Self {
|
|
todo!()
|
|
}
|
|
}
|
|
}
|
|
|
|
pub trait StillNonLocal {}
|
|
|
|
impl StillNonLocal for &str {}
|
|
|
|
fn only_global() {
|
|
struct Foo;
|
|
impl StillNonLocal for &Foo {}
|
|
//~^ WARN non-local `impl` definition
|
|
}
|
|
|
|
struct GlobalSameFunction;
|
|
|
|
fn same_function() {
|
|
struct Local1(GlobalSameFunction);
|
|
impl From<Local1> for GlobalSameFunction {
|
|
//~^ WARN non-local `impl` definition
|
|
fn from(x: Local1) -> GlobalSameFunction {
|
|
x.0
|
|
}
|
|
}
|
|
|
|
struct Local2(GlobalSameFunction);
|
|
impl From<Local2> for GlobalSameFunction {
|
|
//~^ WARN non-local `impl` definition
|
|
fn from(x: Local2) -> GlobalSameFunction {
|
|
x.0
|
|
}
|
|
}
|
|
}
|
|
|
|
struct GlobalDifferentFunction;
|
|
|
|
fn diff_function_1() {
|
|
struct Local(GlobalDifferentFunction);
|
|
|
|
impl From<Local> for GlobalDifferentFunction {
|
|
// FIXME(Urgau): Should warn but doesn't since we currently consider
|
|
// the other impl to be "global", but that's not the case for the type-system
|
|
fn from(x: Local) -> GlobalDifferentFunction {
|
|
x.0
|
|
}
|
|
}
|
|
}
|
|
|
|
fn diff_function_2() {
|
|
struct Local(GlobalDifferentFunction);
|
|
|
|
impl From<Local> for GlobalDifferentFunction {
|
|
// FIXME(Urgau): Should warn but doesn't since we currently consider
|
|
// the other impl to be "global", but that's not the case for the type-system
|
|
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 {}
|
|
}
|