| error[E0666]: nested `impl Trait` is not allowed |
| --> $DIR/where-allowed.rs:49:51 |
| | |
| LL | fn in_impl_Fn_parameter_in_parameters(_: &impl Fn(impl Debug)) { panic!() } |
| | --------^^^^^^^^^^- |
| | | | |
| | | nested `impl Trait` here |
| | outer `impl Trait` |
| |
| error[E0666]: nested `impl Trait` is not allowed |
| --> $DIR/where-allowed.rs:58:57 |
| | |
| LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() } |
| | --------^^^^^^^^^^- |
| | | | |
| | | nested `impl Trait` here |
| | outer `impl Trait` |
| |
| error[E0658]: `impl Trait` in associated types is unstable |
| --> $DIR/where-allowed.rs:119:16 |
| | |
| LL | type Out = impl Debug; |
| | ^^^^^^^^^^ |
| | |
| = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information |
| = help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable |
| = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date |
| |
| error[E0658]: `impl Trait` in type aliases is unstable |
| --> $DIR/where-allowed.rs:154:23 |
| | |
| LL | type InTypeAlias<R> = impl Debug; |
| | ^^^^^^^^^^ |
| | |
| = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information |
| = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable |
| = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date |
| |
| error[E0658]: `impl Trait` in type aliases is unstable |
| --> $DIR/where-allowed.rs:157:39 |
| | |
| LL | type InReturnInTypeAlias<R> = fn() -> impl Debug; |
| | ^^^^^^^^^^ |
| | |
| = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information |
| = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable |
| = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date |
| |
| error[E0562]: `impl Trait` is not allowed in `fn` pointer parameters |
| --> $DIR/where-allowed.rs:18:40 |
| | |
| LL | fn in_fn_parameter_in_parameters(_: fn(impl Debug)) { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in `fn` pointer return types |
| --> $DIR/where-allowed.rs:22:42 |
| | |
| LL | fn in_fn_return_in_parameters(_: fn() -> impl Debug) { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in `fn` pointer parameters |
| --> $DIR/where-allowed.rs:26:38 |
| | |
| LL | fn in_fn_parameter_in_return() -> fn(impl Debug) { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in `fn` pointer return types |
| --> $DIR/where-allowed.rs:30:40 |
| | |
| LL | fn in_fn_return_in_return() -> fn() -> impl Debug { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds |
| --> $DIR/where-allowed.rs:34:49 |
| | |
| LL | fn in_dyn_Fn_parameter_in_parameters(_: &dyn Fn(impl Debug)) { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds |
| --> $DIR/where-allowed.rs:38:51 |
| | |
| LL | fn in_dyn_Fn_return_in_parameters(_: &dyn Fn() -> impl Debug) { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds |
| --> $DIR/where-allowed.rs:42:55 |
| | |
| LL | fn in_dyn_Fn_parameter_in_return() -> &'static dyn Fn(impl Debug) { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds |
| --> $DIR/where-allowed.rs:49:51 |
| | |
| LL | fn in_impl_Fn_parameter_in_parameters(_: &impl Fn(impl Debug)) { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds |
| --> $DIR/where-allowed.rs:54:53 |
| | |
| LL | fn in_impl_Fn_return_in_parameters(_: &impl Fn() -> impl Debug) { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds |
| --> $DIR/where-allowed.rs:58:57 |
| | |
| LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds |
| --> $DIR/where-allowed.rs:66:38 |
| | |
| LL | fn in_Fn_parameter_in_generics<F: Fn(impl Debug)> (_: F) { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds |
| --> $DIR/where-allowed.rs:70:40 |
| | |
| LL | fn in_Fn_return_in_generics<F: Fn() -> impl Debug> (_: F) { panic!() } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in field types |
| --> $DIR/where-allowed.rs:83:32 |
| | |
| LL | struct InBraceStructField { x: impl Debug } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in field types |
| --> $DIR/where-allowed.rs:87:41 |
| | |
| LL | struct InAdtInBraceStructField { x: Vec<impl Debug> } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in field types |
| --> $DIR/where-allowed.rs:91:27 |
| | |
| LL | struct InTupleStructField(impl Debug); |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in field types |
| --> $DIR/where-allowed.rs:96:25 |
| | |
| LL | InBraceVariant { x: impl Debug }, |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in field types |
| --> $DIR/where-allowed.rs:98:20 |
| | |
| LL | InTupleVariant(impl Debug), |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in `extern fn` parameters |
| --> $DIR/where-allowed.rs:138:33 |
| | |
| LL | fn in_foreign_parameters(_: impl Debug); |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in `extern fn` return types |
| --> $DIR/where-allowed.rs:141:31 |
| | |
| LL | fn in_foreign_return() -> impl Debug; |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in `fn` pointer return types |
| --> $DIR/where-allowed.rs:157:39 |
| | |
| LL | type InReturnInTypeAlias<R> = fn() -> impl Debug; |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in traits |
| --> $DIR/where-allowed.rs:162:16 |
| | |
| LL | impl PartialEq<impl Debug> for () { |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in impl headers |
| --> $DIR/where-allowed.rs:167:24 |
| | |
| LL | impl PartialEq<()> for impl Debug { |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in impl headers |
| --> $DIR/where-allowed.rs:172:6 |
| | |
| LL | impl impl Debug { |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in impl headers |
| --> $DIR/where-allowed.rs:178:24 |
| | |
| LL | impl InInherentImplAdt<impl Debug> { |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in bounds |
| --> $DIR/where-allowed.rs:184:11 |
| | |
| LL | where impl Debug: Debug |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in bounds |
| --> $DIR/where-allowed.rs:191:15 |
| | |
| LL | where Vec<impl Debug>: Debug |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in bounds |
| --> $DIR/where-allowed.rs:198:24 |
| | |
| LL | where T: PartialEq<impl Debug> |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds |
| --> $DIR/where-allowed.rs:205:17 |
| | |
| LL | where T: Fn(impl Debug) |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds |
| --> $DIR/where-allowed.rs:212:22 |
| | |
| LL | where T: Fn() -> impl Debug |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in generic parameter defaults |
| --> $DIR/where-allowed.rs:218:40 |
| | |
| LL | struct InStructGenericParamDefault<T = impl Debug>(T); |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in generic parameter defaults |
| --> $DIR/where-allowed.rs:222:36 |
| | |
| LL | enum InEnumGenericParamDefault<T = impl Debug> { Variant(T) } |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in generic parameter defaults |
| --> $DIR/where-allowed.rs:226:38 |
| | |
| LL | trait InTraitGenericParamDefault<T = impl Debug> {} |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in generic parameter defaults |
| --> $DIR/where-allowed.rs:230:41 |
| | |
| LL | type InTypeAliasGenericParamDefault<T = impl Debug> = T; |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in generic parameter defaults |
| --> $DIR/where-allowed.rs:234:11 |
| | |
| LL | impl <T = impl Debug> T {} |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in generic parameter defaults |
| --> $DIR/where-allowed.rs:241:40 |
| | |
| LL | fn in_method_generic_param_default<T = impl Debug>(_: T) {} |
| | ^^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in the type of variable bindings |
| --> $DIR/where-allowed.rs:247:29 |
| | |
| LL | let _in_local_variable: impl Fn() = || {}; |
| | ^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error[E0562]: `impl Trait` is not allowed in closure return types |
| --> $DIR/where-allowed.rs:249:46 |
| | |
| LL | let _in_return_in_local_variable = || -> impl Fn() { || {} }; |
| | ^^^^^^^^^ |
| | |
| = note: `impl Trait` is only allowed in arguments and return types of functions and methods |
| |
| error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions |
| --> $DIR/where-allowed.rs:234:7 |
| | |
| LL | impl <T = impl Debug> T {} |
| | ^^^^^^^^^^^^^^ |
| | |
| = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! |
| = note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887> |
| = note: `#[deny(invalid_type_param_default)]` on by default |
| |
| error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions |
| --> $DIR/where-allowed.rs:241:36 |
| | |
| LL | fn in_method_generic_param_default<T = impl Debug>(_: T) {} |
| | ^^^^^^^^^^^^^^ |
| | |
| = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! |
| = note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887> |
| |
| error[E0118]: no nominal type found for inherent implementation |
| --> $DIR/where-allowed.rs:234:1 |
| | |
| LL | impl <T = impl Debug> T {} |
| | ^^^^^^^^^^^^^^^^^^^^^^^ impl requires a nominal type |
| | |
| = note: either implement a trait on it or create a newtype to wrap it instead |
| |
| error: aborting due to 45 previous errors |
| |
| Some errors have detailed explanations: E0118, E0562, E0658, E0666. |
| For more information about an error, try `rustc --explain E0118`. |