102 lines
2.2 KiB
Rust
102 lines
2.2 KiB
Rust
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//@ check-pass
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//@ edition:2021
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struct Cat;
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struct Wrap<T>(T);
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fn main() {
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impl From<Cat> for () {
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//~^ WARN non-local `impl` definition
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fn from(_: Cat) -> () {
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todo!()
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}
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}
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#[derive(Debug)]
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struct Elephant;
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impl From<Wrap<Wrap<Elephant>>> for () {
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//~^ WARN non-local `impl` definition
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fn from(_: Wrap<Wrap<Elephant>>) -> Self {
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todo!()
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}
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}
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}
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pub trait StillNonLocal {}
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impl StillNonLocal for &str {}
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fn only_global() {
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struct Foo;
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impl StillNonLocal for &Foo {}
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//~^ WARN non-local `impl` definition
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}
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struct GlobalSameFunction;
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fn same_function() {
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struct Local1(GlobalSameFunction);
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impl From<Local1> for GlobalSameFunction {
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//~^ WARN non-local `impl` definition
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fn from(x: Local1) -> GlobalSameFunction {
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x.0
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}
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}
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struct Local2(GlobalSameFunction);
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impl From<Local2> for GlobalSameFunction {
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//~^ WARN non-local `impl` definition
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fn from(x: Local2) -> GlobalSameFunction {
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x.0
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}
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}
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}
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struct GlobalDifferentFunction;
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fn diff_function_1() {
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struct Local(GlobalDifferentFunction);
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impl From<Local> for GlobalDifferentFunction {
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// FIXME(Urgau): Should warn but doesn't since we currently consider
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// the other impl to be "global", but that's not the case for the type-system
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fn from(x: Local) -> GlobalDifferentFunction {
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x.0
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}
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}
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}
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fn diff_function_2() {
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struct Local(GlobalDifferentFunction);
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impl From<Local> for GlobalDifferentFunction {
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// FIXME(Urgau): Should warn but doesn't since we currently consider
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// the other impl to be "global", but that's not the case for the type-system
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fn from(x: Local) -> GlobalDifferentFunction {
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x.0
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}
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}
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}
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// https://github.com/rust-lang/rust/issues/121621#issuecomment-1976826895
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fn commonly_reported() {
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struct Local(u8);
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impl From<Local> for u8 {
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fn from(x: Local) -> u8 {
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x.0
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}
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}
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}
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// https://github.com/rust-lang/rust/issues/121621#issue-2153187542
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pub trait Serde {}
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impl Serde for &[u8] {}
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impl Serde for &str {}
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fn serde() {
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struct Thing;
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impl Serde for &Thing {}
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}
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