mirror of
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460 lines
19 KiB
Plaintext
460 lines
19 KiB
Plaintext
error[E0666]: nested `impl Trait` is not allowed
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--> $DIR/where-allowed.rs:50:51
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LL | fn in_impl_Fn_parameter_in_parameters(_: &impl Fn(impl Debug)) { panic!() }
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| --------^^^^^^^^^^-
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| | |
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| | nested `impl Trait` here
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| outer `impl Trait`
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error[E0666]: nested `impl Trait` is not allowed
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--> $DIR/where-allowed.rs:59:57
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LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() }
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| --------^^^^^^^^^^-
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| | |
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| | nested `impl Trait` here
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| outer `impl Trait`
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error[E0658]: `impl Trait` in associated types is unstable
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--> $DIR/where-allowed.rs:121:16
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LL | type Out = impl Debug;
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| ^^^^^^^^^^
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= note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
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= help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
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error[E0658]: `impl Trait` in type aliases is unstable
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--> $DIR/where-allowed.rs:158:23
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LL | type InTypeAlias<R> = impl Debug;
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| ^^^^^^^^^^
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= note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
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= help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable
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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
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error[E0658]: `impl Trait` in type aliases is unstable
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--> $DIR/where-allowed.rs:162:39
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LL | type InReturnInTypeAlias<R> = fn() -> impl Debug;
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| ^^^^^^^^^^
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= note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
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= help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable
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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
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error[E0562]: `impl Trait` is not allowed in `fn` pointer parameters
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--> $DIR/where-allowed.rs:18:40
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LL | fn in_fn_parameter_in_parameters(_: fn(impl Debug)) { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in `fn` pointer return types
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--> $DIR/where-allowed.rs:22:42
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LL | fn in_fn_return_in_parameters(_: fn() -> impl Debug) { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in `fn` pointer parameters
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--> $DIR/where-allowed.rs:26:38
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LL | fn in_fn_parameter_in_return() -> fn(impl Debug) { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in `fn` pointer return types
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--> $DIR/where-allowed.rs:30:40
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LL | fn in_fn_return_in_return() -> fn() -> impl Debug { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds
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--> $DIR/where-allowed.rs:34:49
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LL | fn in_dyn_Fn_parameter_in_parameters(_: &dyn Fn(impl Debug)) { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds
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--> $DIR/where-allowed.rs:38:51
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LL | fn in_dyn_Fn_return_in_parameters(_: &dyn Fn() -> impl Debug) { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds
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--> $DIR/where-allowed.rs:42:55
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LL | fn in_dyn_Fn_parameter_in_return() -> &'static dyn Fn(impl Debug) { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds
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--> $DIR/where-allowed.rs:50:51
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LL | fn in_impl_Fn_parameter_in_parameters(_: &impl Fn(impl Debug)) { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds
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--> $DIR/where-allowed.rs:55:53
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LL | fn in_impl_Fn_return_in_parameters(_: &impl Fn() -> impl Debug) { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds
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--> $DIR/where-allowed.rs:59:57
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LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds
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--> $DIR/where-allowed.rs:68:38
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LL | fn in_Fn_parameter_in_generics<F: Fn(impl Debug)> (_: F) { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds
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--> $DIR/where-allowed.rs:72:40
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LL | fn in_Fn_return_in_generics<F: Fn() -> impl Debug> (_: F) { panic!() }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in field types
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--> $DIR/where-allowed.rs:85:32
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LL | struct InBraceStructField { x: impl Debug }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in field types
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--> $DIR/where-allowed.rs:89:41
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LL | struct InAdtInBraceStructField { x: Vec<impl Debug> }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in field types
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--> $DIR/where-allowed.rs:93:27
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LL | struct InTupleStructField(impl Debug);
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in field types
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--> $DIR/where-allowed.rs:98:25
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LL | InBraceVariant { x: impl Debug },
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in field types
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--> $DIR/where-allowed.rs:100:20
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LL | InTupleVariant(impl Debug),
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in `extern fn` parameters
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--> $DIR/where-allowed.rs:142:33
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LL | fn in_foreign_parameters(_: impl Debug);
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in `extern fn` return types
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--> $DIR/where-allowed.rs:145:31
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LL | fn in_foreign_return() -> impl Debug;
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in `fn` pointer return types
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--> $DIR/where-allowed.rs:162:39
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LL | type InReturnInTypeAlias<R> = fn() -> impl Debug;
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in traits
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--> $DIR/where-allowed.rs:167:16
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LL | impl PartialEq<impl Debug> for () {
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in impl headers
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--> $DIR/where-allowed.rs:172:24
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LL | impl PartialEq<()> for impl Debug {
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in impl headers
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--> $DIR/where-allowed.rs:177:6
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LL | impl impl Debug {
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in impl headers
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--> $DIR/where-allowed.rs:183:24
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LL | impl InInherentImplAdt<impl Debug> {
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in bounds
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--> $DIR/where-allowed.rs:189:11
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LL | where impl Debug: Debug
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in bounds
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--> $DIR/where-allowed.rs:196:15
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LL | where Vec<impl Debug>: Debug
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in bounds
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--> $DIR/where-allowed.rs:203:24
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LL | where T: PartialEq<impl Debug>
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds
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--> $DIR/where-allowed.rs:210:17
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LL | where T: Fn(impl Debug)
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds
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--> $DIR/where-allowed.rs:217:22
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LL | where T: Fn() -> impl Debug
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in generic parameter defaults
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--> $DIR/where-allowed.rs:223:40
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LL | struct InStructGenericParamDefault<T = impl Debug>(T);
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in generic parameter defaults
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--> $DIR/where-allowed.rs:227:36
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LL | enum InEnumGenericParamDefault<T = impl Debug> { Variant(T) }
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in generic parameter defaults
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--> $DIR/where-allowed.rs:231:38
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LL | trait InTraitGenericParamDefault<T = impl Debug> {}
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in generic parameter defaults
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--> $DIR/where-allowed.rs:235:41
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LL | type InTypeAliasGenericParamDefault<T = impl Debug> = T;
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in generic parameter defaults
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--> $DIR/where-allowed.rs:239:11
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LL | impl <T = impl Debug> T {}
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in generic parameter defaults
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--> $DIR/where-allowed.rs:246:40
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LL | fn in_method_generic_param_default<T = impl Debug>(_: T) {}
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| ^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0562]: `impl Trait` is not allowed in the type of variable bindings
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--> $DIR/where-allowed.rs:252:29
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LL | let _in_local_variable: impl Fn() = || {};
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| ^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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= note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information
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= help: add `#![feature(impl_trait_in_bindings)]` to the crate attributes to enable
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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
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error[E0562]: `impl Trait` is not allowed in closure return types
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--> $DIR/where-allowed.rs:254:46
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LL | let _in_return_in_local_variable = || -> impl Fn() { || {} };
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| ^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0053]: method `in_trait_impl_return` has an incompatible type for trait
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--> $DIR/where-allowed.rs:128:34
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LL | type Out = impl Debug;
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| ---------- the expected opaque type
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...
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LL | fn in_trait_impl_return() -> impl Debug { () }
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| ^^^^^^^^^^ expected opaque type, found a different opaque type
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note: type in trait
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--> $DIR/where-allowed.rs:118:34
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LL | fn in_trait_impl_return() -> Self::Out;
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| ^^^^^^^^^
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= note: expected signature `fn() -> <() as DummyTrait>::Out`
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found signature `fn() -> impl Debug`
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= note: distinct uses of `impl Trait` result in different opaque types
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help: change the output type to match the trait
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LL - fn in_trait_impl_return() -> impl Debug { () }
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LL + fn in_trait_impl_return() -> <() as DummyTrait>::Out { () }
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error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
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--> $DIR/where-allowed.rs:246:36
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LL | fn in_method_generic_param_default<T = impl Debug>(_: T) {}
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| ^^^^^^^^^^^^^^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
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= note: `#[deny(invalid_type_param_default)]` on by default
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error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
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--> $DIR/where-allowed.rs:239:7
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LL | impl <T = impl Debug> T {}
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| ^^^^^^^^^^^^^^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
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error[E0283]: type annotations needed
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--> $DIR/where-allowed.rs:46:57
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LL | fn in_dyn_Fn_return_in_return() -> &'static dyn Fn() -> impl Debug { panic!() }
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| ^^^^^^^^^^ cannot infer type
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= note: cannot satisfy `_: Debug`
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error[E0283]: type annotations needed
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--> $DIR/where-allowed.rs:64:46
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LL | fn in_impl_Fn_return_in_return() -> &'static impl Fn() -> impl Debug { panic!() }
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| ^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
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= note: multiple `impl`s satisfying `_: Fn()` found in the following crates: `alloc`, `core`:
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- impl<A, F> Fn<A> for &F
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where A: Tuple, F: Fn<A>, F: ?Sized;
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- impl<Args, F, A> Fn<Args> for Box<F, A>
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where Args: Tuple, F: Fn<Args>, A: Allocator, F: ?Sized;
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error[E0118]: no nominal type found for inherent implementation
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--> $DIR/where-allowed.rs:239:1
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LL | impl <T = impl Debug> T {}
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| ^^^^^^^^^^^^^^^^^^^^^^^ impl requires a nominal type
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= note: either implement a trait on it or create a newtype to wrap it instead
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error: unconstrained opaque type
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--> $DIR/where-allowed.rs:121:16
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LL | type Out = impl Debug;
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| ^^^^^^^^^^
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= note: `Out` must be used in combination with a concrete type within the same impl
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error: unconstrained opaque type
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--> $DIR/where-allowed.rs:158:23
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LL | type InTypeAlias<R> = impl Debug;
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| ^^^^^^^^^^
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= note: `InTypeAlias` must be used in combination with a concrete type within the same crate
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error: aborting due to 50 previous errors
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Some errors have detailed explanations: E0053, E0118, E0283, E0562, E0658, E0666.
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For more information about an error, try `rustc --explain E0053`.
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Future incompatibility report: Future breakage diagnostic:
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error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
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--> $DIR/where-allowed.rs:246:36
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LL | fn in_method_generic_param_default<T = impl Debug>(_: T) {}
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| ^^^^^^^^^^^^^^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
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= note: `#[deny(invalid_type_param_default)]` on by default
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Future breakage diagnostic:
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error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
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--> $DIR/where-allowed.rs:239:7
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LL | impl <T = impl Debug> T {}
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| ^^^^^^^^^^^^^^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
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= note: `#[deny(invalid_type_param_default)]` on by default
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