50 lines
2.2 KiB
Plaintext
50 lines
2.2 KiB
Plaintext
warning: the feature `effects` is incomplete and may not be safe to use and/or cause compiler crashes
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--> $DIR/derive-const-with-params.rs:5:30
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LL | #![feature(const_trait_impl, effects)]
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| ^^^^^^^
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= note: see issue #102090 <https://github.com/rust-lang/rust/issues/102090> for more information
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= note: `#[warn(incomplete_features)]` on by default
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error: const `impl` for trait `PartialEq` which is not marked with `#[const_trait]`
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--> $DIR/derive-const-with-params.rs:7:16
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LL | #[derive_const(PartialEq)]
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| ^^^^^^^^^
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= note: marking a trait with `#[const_trait]` ensures all default method bodies are `const`
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= note: adding a non-const method body in the future would be a breaking change
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= note: this error originates in the derive macro `PartialEq` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: `~const` can only be applied to `#[const_trait]` traits
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--> $DIR/derive-const-with-params.rs:7:16
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LL | #[derive_const(PartialEq)]
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| ^^^^^^^^^
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= note: this error originates in the derive macro `PartialEq` (in Nightly builds, run with -Z macro-backtrace for more info)
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error[E0207]: the const parameter `host` is not constrained by the impl trait, self type, or predicates
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= note: expressions using a const parameter must map each value to a distinct output value
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= note: proving the result of expressions other than the parameter are unique is not supported
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error[E0284]: type annotations needed
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--> $DIR/derive-const-with-params.rs:11:5
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LL | a == b
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| ^^^^^^ cannot infer the value of the constant `_`
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note: required for `Reverse<i32>` to implement `PartialEq`
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--> $DIR/derive-const-with-params.rs:7:16
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LL | #[derive_const(PartialEq)]
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| ^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro
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= note: this error originates in the derive macro `PartialEq` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: aborting due to 4 previous errors; 1 warning emitted
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Some errors have detailed explanations: E0207, E0284.
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For more information about an error, try `rustc --explain E0207`.
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