implement a hack to make traitobject 0.1.0 compile

src/test/ui/issues/issue-33140-hack-boundaries.rs

@@ -0,0 +1,80 @@
+#![feature(optin_builtin_traits)]
+#![allow(order_dependent_trait_objects)]
+
+// Check that the issue #33140 hack does not allow unintended things.
+
+// OK
+trait Trait0 {
+}
+
+impl Trait0 for dyn Send {}
+impl Trait0 for dyn Send {}
+
+// Problem 1: associated types
+trait Trait1 {
+    fn my_fn(&self) {}
+}
+
+impl Trait1 for dyn Send {}
+impl Trait1 for dyn Send {}
+//~^ ERROR E0119
+
+// Problem 2: negative impl
+trait Trait2 {
+}
+
+impl Trait2 for dyn Send {}
+impl !Trait2 for dyn Send {}
+//~^ ERROR E0119
+
+
+// Problem 3: type parameter
+trait Trait3<T: ?Sized> {
+}
+
+impl Trait3<dyn Sync> for dyn Send {}
+impl Trait3<dyn Sync> for dyn Send {}
+//~^ ERROR E0119
+
+// Problem 4a: not a trait object - generic
+trait Trait4a {
+}
+
+impl<T: ?Sized> Trait4a for T {}
+impl Trait4a for dyn Send {}
+//~^ ERROR E0119
+
+// Problem 4b: not a trait object - misc
+trait Trait4b {
+}
+
+impl Trait4b for () {}
+impl Trait4b for () {}
+//~^ ERROR E0119
+
+// Problem 4c: not a principal-less trait object
+trait Trait4c {
+}
+
+impl Trait4c for dyn Trait1 + Send {}
+impl Trait4c for dyn Trait1 + Send {}
+//~^ ERROR E0119
+
+// Problem 4d: lifetimes
+trait Trait4d {
+}
+
+impl<'a> Trait4d for dyn Send + 'a {}
+impl<'a> Trait4d for dyn Send + 'a {}
+//~^ ERROR E0119
+
+
+// Problem 5: where-clauses
+trait Trait5 {
+}
+
+impl Trait5 for dyn Send {}
+impl Trait5 for dyn Send where u32: Copy {}
+//~^ ERROR E0119
+
+fn main() {}

src/test/ui/issues/issue-33140-hack-boundaries.stderr

@@ -0,0 +1,67 @@
+error[E0119]: conflicting implementations of trait `Trait1` for type `(dyn std::marker::Send + 'static)`:
+  --> $DIR/issue-33140-hack-boundaries.rs:19:1
+   |
+LL | impl Trait1 for dyn Send {}
+   | ------------------------ first implementation here
+LL | impl Trait1 for dyn Send {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Send + 'static)`
+
+error[E0119]: conflicting implementations of trait `Trait2` for type `(dyn std::marker::Send + 'static)`:
+  --> $DIR/issue-33140-hack-boundaries.rs:27:1
+   |
+LL | impl Trait2 for dyn Send {}
+   | ------------------------ first implementation here
+LL | impl !Trait2 for dyn Send {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Send + 'static)`
+
+error[E0119]: conflicting implementations of trait `Trait3<(dyn std::marker::Sync + 'static)>` for type `(dyn std::marker::Send + 'static)`:
+  --> $DIR/issue-33140-hack-boundaries.rs:36:1
+   |
+LL | impl Trait3<dyn Sync> for dyn Send {}
+   | ---------------------------------- first implementation here
+LL | impl Trait3<dyn Sync> for dyn Send {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Send + 'static)`
+
+error[E0119]: conflicting implementations of trait `Trait4a` for type `(dyn std::marker::Send + 'static)`:
+  --> $DIR/issue-33140-hack-boundaries.rs:44:1
+   |
+LL | impl<T: ?Sized> Trait4a for T {}
+   | ----------------------------- first implementation here
+LL | impl Trait4a for dyn Send {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Send + 'static)`
+
+error[E0119]: conflicting implementations of trait `Trait4b` for type `()`:
+  --> $DIR/issue-33140-hack-boundaries.rs:52:1
+   |
+LL | impl Trait4b for () {}
+   | ------------------- first implementation here
+LL | impl Trait4b for () {}
+   | ^^^^^^^^^^^^^^^^^^^ conflicting implementation for `()`
+
+error[E0119]: conflicting implementations of trait `Trait4c` for type `(dyn Trait1 + std::marker::Send + 'static)`:
+  --> $DIR/issue-33140-hack-boundaries.rs:60:1
+   |
+LL | impl Trait4c for dyn Trait1 + Send {}
+   | ---------------------------------- first implementation here
+LL | impl Trait4c for dyn Trait1 + Send {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn Trait1 + std::marker::Send + 'static)`
+
+error[E0119]: conflicting implementations of trait `Trait4d` for type `dyn std::marker::Send`:
+  --> $DIR/issue-33140-hack-boundaries.rs:68:1
+   |
+LL | impl<'a> Trait4d for dyn Send + 'a {}
+   | ---------------------------------- first implementation here
+LL | impl<'a> Trait4d for dyn Send + 'a {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `dyn std::marker::Send`
+
+error[E0119]: conflicting implementations of trait `Trait5` for type `(dyn std::marker::Send + 'static)`:
+  --> $DIR/issue-33140-hack-boundaries.rs:77:1
+   |
+LL | impl Trait5 for dyn Send {}
+   | ------------------------ first implementation here
+LL | impl Trait5 for dyn Send where u32: Copy {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Send + 'static)`
+
+error: aborting due to 8 previous errors
+
+For more information about this error, try `rustc --explain E0119`.

src/test/ui/issues/issue-33140-traitobject-crate.rs

@@ -0,0 +1,101 @@
+// compile-pass
+
+#![warn(order_dependent_trait_objects)]
+
+// Check that traitobject 0.1.0 compiles
+
+//! # traitobject
+//!
+//! Unsafe helpers for working with raw TraitObjects.
+
+/// A trait implemented for all trait objects.
+///
+/// Implementations for all traits in std are provided.
+pub unsafe trait Trait {}
+
+unsafe impl Trait for ::std::any::Any + Send { }
+unsafe impl Trait for ::std::any::Any + Sync { }
+unsafe impl Trait for ::std::any::Any + Send + Sync { }
+unsafe impl<T: ?Sized> Trait for ::std::borrow::Borrow<T> + Send { }
+unsafe impl<T: ?Sized> Trait for ::std::borrow::Borrow<T> + Sync { }
+unsafe impl<T: ?Sized> Trait for ::std::borrow::Borrow<T> + Send + Sync { }
+unsafe impl<T: ?Sized> Trait for ::std::borrow::BorrowMut<T> + Send { }
+unsafe impl<T: ?Sized> Trait for ::std::borrow::BorrowMut<T> + Sync { }
+unsafe impl<T: ?Sized> Trait for ::std::borrow::BorrowMut<T> + Send + Sync { }
+unsafe impl<T: ?Sized> Trait for ::std::convert::AsMut<T> + Send { }
+unsafe impl<T: ?Sized> Trait for ::std::convert::AsMut<T> + Sync { }
+unsafe impl<T: ?Sized> Trait for ::std::convert::AsMut<T> + Send + Sync { }
+unsafe impl<T: ?Sized> Trait for ::std::convert::AsRef<T> + Send { }
+unsafe impl<T: ?Sized> Trait for ::std::convert::AsRef<T> + Sync { }
+unsafe impl<T: ?Sized> Trait for ::std::convert::AsRef<T> + Send + Sync { }
+unsafe impl Trait for ::std::error::Error + Send { }
+unsafe impl Trait for ::std::error::Error + Sync { }
+unsafe impl Trait for ::std::error::Error + Send + Sync { }
+unsafe impl Trait for ::std::fmt::Binary + Send { }
+unsafe impl Trait for ::std::fmt::Binary + Sync { }
+unsafe impl Trait for ::std::fmt::Binary + Send + Sync { }
+unsafe impl Trait for ::std::fmt::Debug + Send { }
+unsafe impl Trait for ::std::fmt::Debug + Sync { }
+unsafe impl Trait for ::std::fmt::Debug + Send + Sync { }
+unsafe impl Trait for ::std::fmt::Display + Send { }
+unsafe impl Trait for ::std::fmt::Display + Sync { }
+unsafe impl Trait for ::std::fmt::Display + Send + Sync { }
+unsafe impl Trait for ::std::fmt::LowerExp + Send { }
+unsafe impl Trait for ::std::fmt::LowerExp + Sync { }
+unsafe impl Trait for ::std::fmt::LowerExp + Send + Sync { }
+unsafe impl Trait for ::std::fmt::LowerHex + Send { }
+unsafe impl Trait for ::std::fmt::LowerHex + Sync { }
+unsafe impl Trait for ::std::fmt::LowerHex + Send + Sync { }
+unsafe impl Trait for ::std::fmt::Octal + Send { }
+unsafe impl Trait for ::std::fmt::Octal + Sync { }
+unsafe impl Trait for ::std::fmt::Octal + Send + Sync { }
+unsafe impl Trait for ::std::fmt::Pointer + Send { }
+unsafe impl Trait for ::std::fmt::Pointer + Sync { }
+unsafe impl Trait for ::std::fmt::Pointer + Send + Sync { }
+unsafe impl Trait for ::std::fmt::UpperExp + Send { }
+unsafe impl Trait for ::std::fmt::UpperExp + Sync { }
+unsafe impl Trait for ::std::fmt::UpperExp + Send + Sync { }
+unsafe impl Trait for ::std::fmt::UpperHex + Send { }
+unsafe impl Trait for ::std::fmt::UpperHex + Sync { }
+unsafe impl Trait for ::std::fmt::UpperHex + Send + Sync { }
+unsafe impl Trait for ::std::fmt::Write + Send { }
+unsafe impl Trait for ::std::fmt::Write + Sync { }
+unsafe impl Trait for ::std::fmt::Write + Send + Sync { }
+unsafe impl Trait for ::std::hash::Hasher + Send { }
+unsafe impl Trait for ::std::hash::Hasher + Sync { }
+unsafe impl Trait for ::std::hash::Hasher + Send + Sync { }
+unsafe impl Trait for ::std::io::BufRead + Send { }
+unsafe impl Trait for ::std::io::BufRead + Sync { }
+unsafe impl Trait for ::std::io::BufRead + Send + Sync { }
+unsafe impl Trait for ::std::io::Read + Send { }
+unsafe impl Trait for ::std::io::Read + Sync { }
+unsafe impl Trait for ::std::io::Read + Send + Sync { }
+unsafe impl Trait for ::std::io::Seek + Send { }
+unsafe impl Trait for ::std::io::Seek + Sync { }
+unsafe impl Trait for ::std::io::Seek + Send + Sync { }
+unsafe impl Trait for ::std::io::Write + Send { }
+unsafe impl Trait for ::std::io::Write + Sync { }
+unsafe impl Trait for ::std::io::Write + Send + Sync { }
+unsafe impl<T, I> Trait for ::std::iter::IntoIterator<IntoIter=I, Item=T> { }
+unsafe impl<T> Trait for ::std::iter::Iterator<Item=T> + Send { }
+unsafe impl<T> Trait for ::std::iter::Iterator<Item=T> + Sync { }
+unsafe impl<T> Trait for ::std::iter::Iterator<Item=T> + Send + Sync { }
+unsafe impl Trait for ::std::marker::Send + Send { }
+unsafe impl Trait for ::std::marker::Send + Sync { }
+unsafe impl Trait for ::std::marker::Send + Send + Sync { }
+unsafe impl Trait for ::std::marker::Sync + Send { }
+unsafe impl Trait for ::std::marker::Sync + Sync { }
+unsafe impl Trait for ::std::marker::Sync + Send + Sync { }
+unsafe impl Trait for ::std::ops::Drop + Send { }
+unsafe impl Trait for ::std::ops::Drop + Sync { }
+unsafe impl Trait for ::std::ops::Drop + Send + Sync { }
+unsafe impl Trait for ::std::string::ToString + Send { }
+unsafe impl Trait for ::std::string::ToString + Sync { }
+unsafe impl Trait for ::std::string::ToString + Send + Sync { }
+fn assert_trait<T: Trait + ?Sized>() {}
+
+fn main() {
+    assert_trait::<dyn Send>();
+    assert_trait::<dyn Sync>();
+    assert_trait::<dyn Send + Sync>();
+}

src/test/ui/issues/issue-33140-traitobject-crate.stderr

@@ -0,0 +1,39 @@
+warning: conflicting implementations of trait `Trait` for type `(dyn std::marker::Sync + std::marker::Send + 'static)`: (E0119)
+  --> $DIR/issue-33140-traitobject-crate.rs:85:1
+   |
+LL | unsafe impl Trait for ::std::marker::Send + Sync { }
+   | ------------------------------------------------ first implementation here
+LL | unsafe impl Trait for ::std::marker::Send + Send + Sync { }
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Sync + std::marker::Send + 'static)`
+   |
+note: lint level defined here
+  --> $DIR/issue-33140-traitobject-crate.rs:3:9
+   |
+LL | #![warn(order_dependent_trait_objects)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #56484 <https://github.com/rust-lang/rust/issues/56484>
+
+warning: conflicting implementations of trait `Trait` for type `(dyn std::marker::Sync + std::marker::Send + 'static)`: (E0119)
+  --> $DIR/issue-33140-traitobject-crate.rs:86:1
+   |
+LL | unsafe impl Trait for ::std::marker::Send + Send + Sync { }
+   | ------------------------------------------------------- first implementation here
+LL | unsafe impl Trait for ::std::marker::Sync + Send { }
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Sync + std::marker::Send + 'static)`
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #56484 <https://github.com/rust-lang/rust/issues/56484>
+
+warning: conflicting implementations of trait `Trait` for type `(dyn std::marker::Sync + std::marker::Send + 'static)`: (E0119)
+  --> $DIR/issue-33140-traitobject-crate.rs:88:1
+   |
+LL | unsafe impl Trait for ::std::marker::Sync + Send { }
+   | ------------------------------------------------ first implementation here
+LL | unsafe impl Trait for ::std::marker::Sync + Sync { }
+LL | unsafe impl Trait for ::std::marker::Sync + Send + Sync { }
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Sync + std::marker::Send + 'static)`
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #56484 <https://github.com/rust-lang/rust/issues/56484>
+

src/test/ui/issues/issue-33140.rs

@@ -1,5 +1,3 @@
-#![deny(order_dependent_trait_objects)]
-
 trait Trait {
     fn xyz() -> bool;
 }
@@ -10,7 +8,6 @@ impl Trait for dyn Send + Sync {
 
 impl Trait for dyn Sync + Send {
 //~^ ERROR conflicting implementations
-//~| hard error
     fn xyz() -> bool { true }
 }
 
@@ -24,14 +21,12 @@ impl Trait2 for dyn Send + Sync {
 
 impl Trait2 for dyn Sync + Send + Sync {
 //~^ ERROR conflicting implementations
-//~| hard error
     fn uvw() -> bool { true }
 }
 
 struct Foo<T: ?Sized>(T);
 impl Foo<dyn Send + Sync> {
     fn abc() -> bool { //~ ERROR duplicate definitions with name `abc`
-                       //~| hard error
         false
     }
 }

src/test/ui/issues/issue-33140.stderr

@@ -1,37 +1,25 @@
-error: conflicting implementations of trait `Trait` for type `(dyn std::marker::Send + std::marker::Sync + 'static)`: (E0119)
-  --> $DIR/issue-33140.rs:11:1
+error[E0119]: conflicting implementations of trait `Trait` for type `(dyn std::marker::Sync + std::marker::Send + 'static)`:
+  --> $DIR/issue-33140.rs:9:1
    |
 LL | impl Trait for dyn Send + Sync {
    | ------------------------------ first implementation here
 ...
 LL | impl Trait for dyn Sync + Send {
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Send + std::marker::Sync + 'static)`
-   |
-note: lint level defined here
-  --> $DIR/issue-33140.rs:1:9
-   |
-LL | #![deny(order_dependent_trait_objects)]
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #56484 <https://github.com/rust-lang/rust/issues/56484>
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Sync + std::marker::Send + 'static)`
 
-error: conflicting implementations of trait `Trait2` for type `(dyn std::marker::Send + std::marker::Sync + 'static)`: (E0119)
-  --> $DIR/issue-33140.rs:25:1
+error[E0119]: conflicting implementations of trait `Trait2` for type `(dyn std::marker::Sync + std::marker::Send + 'static)`:
+  --> $DIR/issue-33140.rs:22:1
    |
 LL | impl Trait2 for dyn Send + Sync {
    | ------------------------------- first implementation here
 ...
 LL | impl Trait2 for dyn Sync + Send + Sync {
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Send + std::marker::Sync + 'static)`
-   |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #56484 <https://github.com/rust-lang/rust/issues/56484>
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn std::marker::Sync + std::marker::Send + 'static)`
 
-error: duplicate definitions with name `abc` (E0592)
-  --> $DIR/issue-33140.rs:33:5
+error[E0592]: duplicate definitions with name `abc`
+  --> $DIR/issue-33140.rs:29:5
    |
 LL | /     fn abc() -> bool { //~ ERROR duplicate definitions with name `abc`
-LL | |                        //~| hard error
 LL | |         false
 LL | |     }
    | |_____^ duplicate definitions for `abc`
@@ -40,9 +28,8 @@ LL | /     fn abc() -> bool {
 LL | |         true
 LL | |     }
    | |_____- other definition for `abc`
-   |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #56484 <https://github.com/rust-lang/rust/issues/56484>
 
 error: aborting due to 3 previous errors
 
+Some errors occurred: E0119, E0592.
+For more information about an error, try `rustc --explain E0119`.