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Reinstated shallow disallowing of maybe bounds in trait objects.
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Alexander Regueiro
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May 20, 2019
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,6 +1,9 @@ | ||
trait Tr: ?Sized {} //~ ERROR `?Trait` is not permitted in supertraits | ||
trait Tr: ?Sized {} | ||
//~^ ERROR `?Trait` is not permitted in supertraits | ||
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type A1 = dyn Tr + (?Sized); | ||
//~^ ERROR `?Trait` is not permitted in trait object types | ||
type A2 = dyn for<'a> Tr + (?Sized); | ||
//~^ ERROR `?Trait` is not permitted in trait object types | ||
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fn main() {} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,9 +1,21 @@ | ||
error: `?Trait` is not permitted in trait object types | ||
--> $DIR/trait-object-trait-parens.rs:6:25 | ||
| | ||
LL | let _: Box<(Copy) + (?Sized) + (for<'a> Trait<'a>)>; | ||
| ^^^^^^^^ | ||
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error: `?Trait` is not permitted in trait object types | ||
--> $DIR/trait-object-trait-parens.rs:9:47 | ||
| | ||
LL | let _: Box<(for<'a> Trait<'a>) + (Copy) + (?Sized)>; | ||
| ^^^^^^^^ | ||
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error[E0261]: use of undeclared lifetime name `'a` | ||
--> $DIR/trait-object-trait-parens.rs:8:31 | ||
--> $DIR/trait-object-trait-parens.rs:9:31 | ||
| | ||
LL | let _: Box<(for<'a> Trait<'a>) + (Copy) + (?Sized)>; | ||
| ^^ undeclared lifetime | ||
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error: aborting due to previous error | ||
error: aborting due to 3 previous errors | ||
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For more information about this error, try `rustc --explain E0261`. |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,15 +1,20 @@ | ||
// compile-pass | ||
// compile-fail | ||
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// Test that `dyn ... + ?Sized + ...` is okay (though `?Sized` has no effect in trait objects). | ||
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trait Foo {} | ||
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type _0 = dyn ?Sized + Foo; | ||
//~^ ERROR `?Trait` is not permitted in trait object types | ||
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type _1 = dyn Foo + ?Sized; | ||
//~^ ERROR `?Trait` is not permitted in trait object types | ||
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type _2 = dyn Foo + ?Sized + ?Sized; | ||
//~^ ERROR `?Trait` is not permitted in trait object types | ||
//~| ERROR `?Trait` is not permitted in trait object types | ||
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type _3 = dyn ?Sized + Foo; | ||
//~^ ERROR `?Trait` is not permitted in trait object types | ||
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fn main() {} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,32 @@ | ||
error: `?Trait` is not permitted in trait object types | ||
--> $DIR/wf-trait-object-maybe-bound.rs:7:15 | ||
| | ||
LL | type _0 = dyn ?Sized + Foo; | ||
| ^^^^^^ | ||
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error: `?Trait` is not permitted in trait object types | ||
--> $DIR/wf-trait-object-maybe-bound.rs:10:21 | ||
| | ||
LL | type _1 = dyn Foo + ?Sized; | ||
| ^^^^^^ | ||
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error: `?Trait` is not permitted in trait object types | ||
--> $DIR/wf-trait-object-maybe-bound.rs:13:21 | ||
| | ||
LL | type _2 = dyn Foo + ?Sized + ?Sized; | ||
| ^^^^^^ | ||
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error: `?Trait` is not permitted in trait object types | ||
--> $DIR/wf-trait-object-maybe-bound.rs:13:30 | ||
| | ||
LL | type _2 = dyn Foo + ?Sized + ?Sized; | ||
| ^^^^^^ | ||
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error: `?Trait` is not permitted in trait object types | ||
--> $DIR/wf-trait-object-maybe-bound.rs:17:15 | ||
| | ||
LL | type _3 = dyn ?Sized + Foo; | ||
| ^^^^^^ | ||
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error: aborting due to 5 previous errors | ||
|
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,8 +1,14 @@ | ||
error: `?Trait` is not permitted in trait object types | ||
--> $DIR/wf-trait-object-only-maybe-bound.rs:3:15 | ||
| | ||
LL | type _0 = dyn ?Sized; | ||
| ^^^^^^ | ||
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error[E0224]: at least one non-builtin trait is required for an object type | ||
--> $DIR/wf-trait-object-only-maybe-bound.rs:3:11 | ||
| | ||
LL | type _0 = dyn ?Sized; | ||
| ^^^^^^^^^^ | ||
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error: aborting due to previous error | ||
error: aborting due to 2 previous errors | ||
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