rust/tests/ui/borrowck/borrowck-borrow-mut-object-twice.rs

// Check that `&mut` objects cannot be borrowed twice, just like
// other `&mut` pointers.


trait Foo {
    fn f1(&mut self) -> &();
    fn f2(&mut self);
}

fn test(x: &mut dyn Foo) {
    let y = x.f1();
    x.f2(); //~ ERROR cannot borrow `*x` as mutable
    y.use_ref();
}

fn main() {}

trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { }  }
impl<T> Fake for T { }
tests: Add new tests for borrowck/objects and update some existing tests 2013-08-11 17:58:48 +00:00			// Check that `&mut` objects cannot be borrowed twice, just like
			// other `&mut` pointers.
rustc: Implement ~Trait. r=nmatsakis 2012-10-31 22:09:26 +00:00
Updated the most glaring instances of weak tests w.r.t. NLL that came from #53196. See also the bulletpoint list on #53351. 2018-08-14 23:16:05 +00:00

tests: Add new tests for borrowck/objects and update some existing tests 2013-08-11 17:58:48 +00:00			`trait Foo {`
librustc: Implement lifetime elision. This implements RFC 39. Omitted lifetimes in return values will now be inferred to more useful defaults, and an error is reported if a lifetime in a return type is omitted and one of the two lifetime elision rules does not specify what it should be. This primarily breaks two uncommon code patterns. The first is this: unsafe fn get_foo_out_of_thin_air() -> &Foo { ... } This should be changed to: unsafe fn get_foo_out_of_thin_air() -> &'static Foo { ... } The second pattern that needs to be changed is this: enum MaybeBorrowed<'a> { Borrowed(&'a str), Owned(String), } fn foo() -> MaybeBorrowed { Owned(format!("hello world")) } Change code like this to: enum MaybeBorrowed<'a> { Borrowed(&'a str), Owned(String), } fn foo() -> MaybeBorrowed<'static> { Owned(format!("hello world")) } Closes #15552. [breaking-change] 2014-07-18 04:44:59 +00:00			`fn f1(&mut self) -> &();`
tests: Add new tests for borrowck/objects and update some existing tests 2013-08-11 17:58:48 +00:00			`fn f2(&mut self);`
rustc: Implement ~Trait. r=nmatsakis 2012-10-31 22:09:26 +00:00			`}`

Update ui test suite to use dyn 2019-05-28 18:46:13 +00:00			`fn test(x: &mut dyn Foo) {`
Updated the most glaring instances of weak tests w.r.t. NLL that came from #53196. See also the bulletpoint list on #53351. 2018-08-14 23:16:05 +00:00			`let y = x.f1();`
test -- update tests with new error messages 2014-02-10 12:44:03 +00:00			x.f2(); //~ ERROR cannot borrow `*x` as mutable
Updated the most glaring instances of weak tests w.r.t. NLL that came from #53196. See also the bulletpoint list on #53351. 2018-08-14 23:16:05 +00:00			`y.use_ref();`
rustc: Implement ~Trait. r=nmatsakis 2012-10-31 22:09:26 +00:00			`}`

tests: Add new tests for borrowck/objects and update some existing tests 2013-08-11 17:58:48 +00:00			`fn main() {}`
Updated the most glaring instances of weak tests w.r.t. NLL that came from #53196. See also the bulletpoint list on #53351. 2018-08-14 23:16:05 +00:00
			`trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } }`
			`impl<T> Fake for T { }`