mirror of https://github.com/rust-lang/rust
36 lines
1.3 KiB
Plaintext
36 lines
1.3 KiB
Plaintext
error[E0049]: method `a` has 1 const parameter but its trait declaration has 0 const parameters
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--> $DIR/const-closure-trait-method-fail.rs:5:1
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LL | #[const_trait]
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| ^^^^^^^^^^^^^^ found 1 const parameter
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LL | trait Tr {
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LL | fn a(self) -> i32;
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| - expected 0 const parameters
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error: `~const` can only be applied to `#[const_trait]` traits
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--> $DIR/const-closure-trait-method-fail.rs:14:39
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LL | const fn need_const_closure<T: ~const FnOnce(()) -> i32>(x: T) -> i32 {
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| ^^^^^^^^^^^^^^^^^
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error[E0015]: cannot call non-const closure in constant functions
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--> $DIR/const-closure-trait-method-fail.rs:15:5
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LL | x(())
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| ^^^^^
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= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
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help: consider further restricting this bound
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LL | const fn need_const_closure<T: ~const FnOnce(()) -> i32 + ~const FnOnce(())>(x: T) -> i32 {
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| +++++++++++++++++++
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help: add `#![feature(effects)]` to the crate attributes to enable
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LL + #![feature(effects)]
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error: aborting due to 3 previous errors
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Some errors have detailed explanations: E0015, E0049.
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For more information about an error, try `rustc --explain E0015`.
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