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