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1d52972dd8
Use parenthetical notation for `Fn` traits Always use the `Fn(T) -> R` format when printing closure traits instead of `Fn<(T,), Output = R>`. Address #67100: ``` error[E0277]: expected a `Fn()` closure, found `F` --> file.rs:6:13 | 6 | call_fn(f) | ------- ^ expected an `Fn()` closure, found `F` | | | required by a bound introduced by this call | = note: wrap the `F` in a closure with no arguments: `|| { /* code */ }` note: required by a bound in `call_fn` --> file.rs:1:15 | 1 | fn call_fn<F: Fn() -> ()>(f: &F) { | ^^^^^^^^^^ required by this bound in `call_fn` help: consider further restricting this bound | 5 | fn call_any<F: std::any::Any + Fn()>(f: &F) { | ++++++ ```
181 lines
7.8 KiB
Plaintext
181 lines
7.8 KiB
Plaintext
error[E0658]: rust-call ABI is subject to change
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:13:12
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LL | extern "rust-call" fn call(self, args: ()) -> () {}
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| ^^^^^^^^^^^
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= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
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= help: add `#![feature(unboxed_closures)]` 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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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]: rust-call ABI is subject to change
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:22:12
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LL | extern "rust-call" fn call_once(self, args: ()) -> () {}
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| ^^^^^^^^^^^
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= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
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= help: add `#![feature(unboxed_closures)]` 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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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]: rust-call ABI is subject to change
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:30:12
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LL | extern "rust-call" fn call_mut(&self, args: ()) -> () {}
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| ^^^^^^^^^^^
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= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
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= help: add `#![feature(unboxed_closures)]` 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]: rust-call ABI is subject to change
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:39:12
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LL | extern "rust-call" fn call_once(&self, args: ()) -> () {}
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| ^^^^^^^^^^^
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= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
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= help: add `#![feature(unboxed_closures)]` 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]: the precise format of `Fn`-family traits' type parameters is subject to change
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:9:6
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LL | impl Fn<()> for Foo {
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| ^^^^^^
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= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
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= help: add `#![feature(unboxed_closures)]` 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[E0183]: manual implementations of `Fn` are experimental
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:9:6
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LL | impl Fn<()> for Foo {
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| ^^^^^^ manual implementations of `Fn` are experimental
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= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
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error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:26:6
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LL | impl FnMut<()> for Bar {
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| ^^^^^^^^^
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= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
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= help: add `#![feature(unboxed_closures)]` 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[E0183]: manual implementations of `FnMut` are experimental
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:26:6
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LL | impl FnMut<()> for Bar {
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| ^^^^^^^^^ manual implementations of `FnMut` are experimental
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= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
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error[E0277]: expected a `FnMut()` closure, found `Foo`
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:9:17
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LL | impl Fn<()> for Foo {
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| ^^^ expected an `FnMut()` closure, found `Foo`
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= help: the trait `FnMut()` is not implemented for `Foo`
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= note: wrap the `Foo` in a closure with no arguments: `|| { /* code */ }`
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note: required by a bound in `Fn`
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--> $SRC_DIR/core/src/ops/function.rs:LL:COL
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error[E0053]: method `call` has an incompatible type for trait
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:13:32
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LL | extern "rust-call" fn call(self, args: ()) -> () {}
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| ^^^^
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| |
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| expected `&Foo`, found `Foo`
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| help: change the self-receiver type to match the trait: `&self`
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= note: expected signature `extern "rust-call" fn(&Foo, ()) -> _`
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found signature `extern "rust-call" fn(Foo, ())`
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error[E0183]: manual implementations of `FnOnce` are experimental
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
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LL | impl FnOnce() for Foo1 {
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| ^^^^^^^^ manual implementations of `FnOnce` are experimental
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= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
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error[E0229]: associated item constraints are not allowed here
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
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LL | impl FnOnce() for Foo1 {
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| ^^^^^^^^ associated item constraint not allowed here
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help: parenthesized trait syntax expands to `FnOnce<(), Output=()>`
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
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LL | impl FnOnce() for Foo1 {
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| ^^^^^^^^
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error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:35:6
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LL | impl FnOnce<()> for Baz {
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| ^^^^^^^^^^
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= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
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= help: add `#![feature(unboxed_closures)]` 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[E0183]: manual implementations of `FnOnce` are experimental
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:35:6
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LL | impl FnOnce<()> for Baz {
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| ^^^^^^^^^^ manual implementations of `FnOnce` are experimental
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= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
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error[E0046]: not all trait items implemented, missing: `Output`
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:1
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LL | impl FnOnce() for Foo1 {
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| ^^^^^^^^^^^^^^^^^^^^^^ missing `Output` in implementation
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= help: implement the missing item: `type Output = /* Type */;`
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error[E0277]: expected a `FnOnce()` closure, found `Bar`
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:26:20
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LL | impl FnMut<()> for Bar {
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| ^^^ expected an `FnOnce()` closure, found `Bar`
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= help: the trait `FnOnce()` is not implemented for `Bar`
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= note: wrap the `Bar` in a closure with no arguments: `|| { /* code */ }`
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note: required by a bound in `FnMut`
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--> $SRC_DIR/core/src/ops/function.rs:LL:COL
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error[E0053]: method `call_mut` has an incompatible type for trait
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:30:36
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LL | extern "rust-call" fn call_mut(&self, args: ()) -> () {}
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| ^^^^^
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| |
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| types differ in mutability
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| help: change the self-receiver type to match the trait: `&mut self`
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= note: expected signature `extern "rust-call" fn(&mut Bar, ()) -> _`
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found signature `extern "rust-call" fn(&Bar, ())`
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error[E0046]: not all trait items implemented, missing: `Output`
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--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:35:1
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LL | impl FnOnce<()> for Baz {
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| ^^^^^^^^^^^^^^^^^^^^^^^ missing `Output` in implementation
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= help: implement the missing item: `type Output = /* Type */;`
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error: aborting due to 18 previous errors
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Some errors have detailed explanations: E0046, E0053, E0183, E0229, E0277, E0658.
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For more information about an error, try `rustc --explain E0046`.
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