rust/tests/ui/consts/unstable-const-fn-in-libcore.stderr
Esteban Küber e6bd6c2044 Use parenthetical notation for Fn traits
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) {
  |                              ++++++
```
2024-05-29 22:26:54 +00:00

44 lines
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Text

error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/unstable-const-fn-in-libcore.rs:19:39
|
LL | const fn unwrap_or_else<F: ~const FnOnce() -> T>(self, f: F) -> T {
| ^^^^^^^^^^^^^
error[E0015]: cannot call non-const closure in constant functions
--> $DIR/unstable-const-fn-in-libcore.rs:24:26
|
LL | Opt::None => 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 unwrap_or_else<F: ~const FnOnce() -> T + ~const FnOnce()>(self, f: F) -> T {
| +++++++++++++++++
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error[E0493]: destructor of `F` cannot be evaluated at compile-time
--> $DIR/unstable-const-fn-in-libcore.rs:19:60
|
LL | const fn unwrap_or_else<F: ~const FnOnce() -> T>(self, f: F) -> T {
| ^ the destructor for this type cannot be evaluated in constant functions
...
LL | }
| - value is dropped here
error[E0493]: destructor of `Opt<T>` cannot be evaluated at compile-time
--> $DIR/unstable-const-fn-in-libcore.rs:19:54
|
LL | const fn unwrap_or_else<F: ~const FnOnce() -> T>(self, f: F) -> T {
| ^^^^ the destructor for this type cannot be evaluated in constant functions
...
LL | }
| - value is dropped here
error: aborting due to 4 previous errors
Some errors have detailed explanations: E0015, E0493.
For more information about an error, try `rustc --explain E0015`.