rust/tests/ui/traits/object-does-not-impl-trait.rs

// Test that an object type `Box<Foo>` is not considered to implement the
// trait `Foo`. Issue #5087.

trait Foo {}
fn take_foo<F:Foo>(f: F) {}
fn take_object(f: Box<dyn Foo>) { take_foo(f); }
//~^ ERROR `Box<dyn Foo>: Foo` is not satisfied
fn main() {}
librustc: Remove `~EXPR`, `~TYPE`, and `~PAT` from the language, except for `~str`/`~[]`. Note that `~self` still remains, since I forgot to add support for `Box<self>` before the snapshot. How to update your code: * Instead of `~EXPR`, you should write `box EXPR`. * Instead of `~TYPE`, you should write `Box<Type>`. * Instead of `~PATTERN`, you should write `box PATTERN`. [breaking-change] 2014-05-06 01:56:44 +00:00			// Test that an object type `Box<Foo>` is not considered to implement the
Make object types not implement associated trait. Fixes #5087. 2013-03-05 22:49:50 +00:00			// trait `Foo`. Issue #5087.
Refactor trans to replace lvalue and friends with Datum. Also: - report illegal move/ref combos whether or not ref comes first - commented out fix for #3387, too restrictive and causes an ICE 2012-08-28 22:54:45 +00:00
test: Fix fallout in tests 2015-04-18 05:12:20 +00:00			`trait Foo {}`
Make object types not implement associated trait. Fixes #5087. 2013-03-05 22:49:50 +00:00			`fn take_foo<F:Foo>(f: F) {}`
Update ui test suite to use dyn 2019-05-28 18:46:13 +00:00			`fn take_object(f: Box<dyn Foo>) { take_foo(f); }`
pretty: trim paths of unique symbols If a symbol name can only be imported from one place for a type, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path and print only the name. This has wide implications on error messages with types, for example, shortening `std::vec::Vec` to just `Vec`, as long as there is no other `Vec` importable anywhere. This adds a new '-Z trim-diagnostic-paths=false' option to control this feature. On the good path, with no diagnosis printed, we should try to avoid issuing this query, so we need to prevent trimmed_def_paths query on several cases. This change also relies on a previous commit that differentiates between `Debug` and `Display` on various rustc types, where the latter is trimmed and presented to the user and the former is not. 2020-09-02 07:40:56 +00:00			//~^ ERROR `Box<dyn Foo>: Foo` is not satisfied
Make object types not implement associated trait. Fixes #5087. 2013-03-05 22:49:50 +00:00			`fn main() {}`