46 lines
1.9 KiB
Plaintext
46 lines
1.9 KiB
Plaintext
error: inherent impls cannot be `const`
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--> $DIR/span-bug-issue-121418.rs:7:12
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LL | impl const dyn T {
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| ----- ^^^^^ inherent impl for this type
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| |
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| `const` because of this
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= note: only trait implementations may be annotated with `const`
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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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--> $DIR/span-bug-issue-121418.rs:7:6
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LL | impl const dyn T {
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| ^^^^^ unconstrained const parameter
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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[E0308]: mismatched types
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--> $DIR/span-bug-issue-121418.rs:10:27
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LL | pub const fn new() -> std::sync::Mutex<dyn T> {}
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| --- ^^^^^^^^^^^^^^^^^^^^^^^ expected `Mutex<dyn T>`, found `()`
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| |
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| implicitly returns `()` as its body has no tail or `return` expression
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= note: expected struct `Mutex<(dyn T + 'static)>`
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found unit type `()`
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error[E0277]: the size for values of type `(dyn T + 'static)` cannot be known at compilation time
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--> $DIR/span-bug-issue-121418.rs:10:27
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LL | pub const fn new() -> std::sync::Mutex<dyn T> {}
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| ^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
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= help: within `Mutex<(dyn T + 'static)>`, the trait `Sized` is not implemented for `(dyn T + 'static)`, which is required by `Mutex<(dyn T + 'static)>: Sized`
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note: required because it appears within the type `Mutex<(dyn T + 'static)>`
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--> $SRC_DIR/std/src/sync/mutex.rs:LL:COL
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= note: the return type of a function must have a statically known size
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error: aborting due to 4 previous errors
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Some errors have detailed explanations: E0207, E0277, E0308.
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For more information about an error, try `rustc --explain E0207`.
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