rust/tests/ui/issues/issue-4972.rs

#![feature(box_patterns)]

trait MyTrait {
    fn dummy(&self) {}
}

pub enum TraitWrapper {
    A(Box<dyn MyTrait + 'static>),
}

fn get_tw_map(tw: &TraitWrapper) -> &dyn MyTrait {
    match *tw {
        TraitWrapper::A(box ref map) => map, //~ ERROR cannot be dereferenced
    }
}

pub fn main() {}
Opt into `box_patterns` feature gate in all tests that use them. 2015-02-10 21:52:00 +00:00			`#![feature(box_patterns)]`
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
Fallout: tests. As tests frequently elide things, lots of changes here. Some of this may have been poorly rebased, though I tried to be careful and preserve the spirit of the test. 2015-02-12 15:29:52 +00:00			`trait MyTrait {`
			`fn dummy(&self) {}`
			`}`
testsuite: Add test cases that pass 2013-05-23 02:51:21 +00:00
			`pub enum TraitWrapper {`
Update ui test suite to use dyn 2019-05-28 18:46:13 +00:00			`A(Box<dyn MyTrait + 'static>),`
testsuite: Add test cases that pass 2013-05-23 02:51:21 +00:00			`}`

Update ui test suite to use dyn 2019-05-28 18:46:13 +00:00			`fn get_tw_map(tw: &TraitWrapper) -> &dyn MyTrait {`
testsuite: Add test cases that pass 2013-05-23 02:51:21 +00:00			`match *tw {`
Switch to purely namespaced enums This breaks code that referred to variant names in the same namespace as their enum. Reexport the variants in the old location or alter code to refer to the new locations: ``` pub enum Foo { A, B } fn main() { let a = A; } ``` => ``` pub use self::Foo::{A, B}; pub enum Foo { A, B } fn main() { let a = A; } ``` or ``` pub enum Foo { A, B } fn main() { let a = Foo::A; } ``` [breaking-change] 2014-11-06 08:05:53 +00:00			`TraitWrapper::A(box ref map) => map, //~ ERROR cannot be dereferenced`
testsuite: Add test cases that pass 2013-05-23 02:51:21 +00:00			`}`
			`}`

Fix error messages in test cases, since fns/traits now pretty-print with a bounds list 2013-06-23 06:44:51 +00:00			`pub fn main() {}`