8551cab7b7
Note the parentheses in the last suggestion:
```
error[E0277]: the size for values of type `(dyn Foo + Send + 'static)` cannot be known at compilation time
--> $DIR/not-on-bare-trait.rs:7:8
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LL | fn foo(_x: Foo + Send) {
| ^^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `(dyn Foo + Send + 'static)`
= help: unsized fn params are gated as an unstable feature
help: you can use `impl Trait` as the argument type
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LL | fn foo(_x: impl Foo + Send) {
| ++++
help: function arguments must have a statically known size, borrowed types always have a known size
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LL | fn foo(_x: &(Foo + Send)) {
| ++ +
```
17 lines
396 B
Rust
17 lines
396 B
Rust
trait Foo {
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fn dummy(&self) {}
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}
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// This should emit the less confusing error, not the more confusing one.
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fn foo(_x: Foo + Send) {
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//~^ ERROR the size for values of type
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//~| WARN trait objects without an explicit `dyn` are deprecated
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//~| WARN this is accepted in the current edition
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}
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fn bar(_x: (dyn Foo + Send)) {
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//~^ ERROR the size for values of type
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}
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fn main() {}
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