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error: inherent impls cannot be const
--> $DIR/macro-const-trait-bound-theoretical-regression.rs:10:40
|
LL | (impl $c:ident Trait) => { impl $c Trait {} };
| ^^^^^ inherent impl for this type
...
LL | demo! { impl const Trait }
| --------------------------
| | |
| | const because of this
| in this macro invocation
|
= note: only trait implementations may be annotated with `const`
= note: this error originates in the macro `demo` (in Nightly builds, run with -Z macro-backtrace for more info)
error: macro expansion ignores keyword `dyn` and any tokens following
--> $DIR/macro-const-trait-bound-theoretical-regression.rs:14:31
|
LL | (dyn $c:ident Trait) => { dyn $c Trait {} };
| ^^^
...
LL | demo! { dyn const Trait }
| ------------------------- caused by the macro expansion here
|
= note: the usage of `demo!` is likely invalid in item context
error[E0658]: const trait impls are experimental
--> $DIR/macro-const-trait-bound-theoretical-regression.rs:17:14
|
LL | demo! { impl const Trait }
| ^^^^^
|
= note: see issue #143874 <https://github.com/rust-lang/rust/issues/143874> for more information
= help: add `#![feature(const_trait_impl)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/macro-const-trait-bound-theoretical-regression.rs:10:40
|
LL | (impl $c:ident Trait) => { impl $c Trait {} };
| ^^^^^
...
LL | demo! { impl const Trait }
| -------------------------- in this macro invocation
|
= warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
= note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
= note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
= note: this warning originates in the macro `demo` (in Nightly builds, run with -Z macro-backtrace for more info)
help: you might have intended to implement this trait for a given type
|
LL | (impl $c:ident Trait) => { impl $c Trait for /* Type */ {} };
| ++++++++++++++
error: aborting due to 3 previous errors; 1 warning emitted
For more information about this error, try `rustc --explain E0658`.
|
