mirror of
https://github.com/rust-lang/rust.git
synced 2025-11-28 10:46:43 +00:00
e6bd6c2044
Always use the `Fn(T) -> R` format when printing closure traits instead of `Fn<(T,), Output = R>`. Fix #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) { | ++++++ ```
76 lines
2.4 KiB
Plaintext
76 lines
2.4 KiB
Plaintext
error: `~const` can only be applied to `#[const_trait]` traits
|
|
--> $DIR/const-closures.rs:8:19
|
|
|
|
|
LL | F: ~const FnOnce() -> u8,
|
|
| ^^^^^^^^^^^^^^
|
|
|
|
error: `~const` can only be applied to `#[const_trait]` traits
|
|
--> $DIR/const-closures.rs:9:19
|
|
|
|
|
LL | F: ~const FnMut() -> u8,
|
|
| ^^^^^^^^^^^^^
|
|
|
|
error: `~const` can only be applied to `#[const_trait]` traits
|
|
--> $DIR/const-closures.rs:10:19
|
|
|
|
|
LL | F: ~const Fn() -> u8,
|
|
| ^^^^^^^^^^
|
|
|
|
error: `~const` can only be applied to `#[const_trait]` traits
|
|
--> $DIR/const-closures.rs:23:27
|
|
|
|
|
LL | const fn answer<F: ~const Fn() -> u8>(f: &F) -> u8 {
|
|
| ^^^^^^^^^^
|
|
|
|
error[E0015]: cannot call non-const closure in constant functions
|
|
--> $DIR/const-closures.rs:24:5
|
|
|
|
|
LL | f() + f()
|
|
| ^^^
|
|
|
|
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
|
|
help: consider further restricting this bound
|
|
|
|
|
LL | const fn answer<F: ~const Fn() -> u8 + ~const Fn()>(f: &F) -> u8 {
|
|
| +++++++++++++
|
|
help: add `#![feature(effects)]` to the crate attributes to enable
|
|
|
|
|
LL + #![feature(effects)]
|
|
|
|
|
|
|
error[E0015]: cannot call non-const closure in constant functions
|
|
--> $DIR/const-closures.rs:24:11
|
|
|
|
|
LL | f() + f()
|
|
| ^^^
|
|
|
|
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
|
|
help: consider further restricting this bound
|
|
|
|
|
LL | const fn answer<F: ~const Fn() -> u8 + ~const Fn()>(f: &F) -> u8 {
|
|
| +++++++++++++
|
|
help: add `#![feature(effects)]` to the crate attributes to enable
|
|
|
|
|
LL + #![feature(effects)]
|
|
|
|
|
|
|
error[E0015]: cannot call non-const closure in constant functions
|
|
--> $DIR/const-closures.rs:12:5
|
|
|
|
|
LL | f() * 7
|
|
| ^^^
|
|
|
|
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
|
|
help: consider further restricting this bound
|
|
|
|
|
LL | F: ~const FnOnce() -> u8 + ~const Fn(),
|
|
| +++++++++++++
|
|
help: add `#![feature(effects)]` to the crate attributes to enable
|
|
|
|
|
LL + #![feature(effects)]
|
|
|
|
|
|
|
error: aborting due to 7 previous errors
|
|
|
|
For more information about this error, try `rustc --explain E0015`.
|