rust/tests/ui/closures/closure-immutable-outer-variable.rs.fixed

// Point at the captured immutable outer variable

fn foo(mut f: Box<FnMut()>) {
    f();
}

fn main() {
    let mut y = true;
    foo(Box::new(move || y = false) as Box<_>); //~ ERROR cannot assign to captured outer variable
}
First step towards rustfix compiletest mode This is the first small step towards testing auto-fixable compiler suggestions using compiletest. Currently, it only checks if next to a UI test there also happens to a `*.rs.fixed` file, and then uses rustfix (added as external crate) on the original file, and asserts that it produces the fixed version. To show that this works, I've included one such test. I picked this test case at random (and because it was simple) -- It is not relevant to the 2018 edition. Indeed, in the near future, we want to be able to restrict rustfix to edition-lints, so this test cast might go away soon. In case you still think this is somewhat feature-complete, here's a quick list of things currently missing that I want to add before telling people they can use this: - [ ] Make this an actual compiletest mode, with `test [fix] …` output and everything - [ ] Assert that fixed files still compile - [ ] Assert that fixed files produce no (or a known set of) diagnostics output - [ ] Update `update-references.sh` to support rustfix - [ ] Use a published version of rustfix (i.e.: publish a new version rustfix that exposes a useful API for this) 2018-04-20 00:04:08 +02:00			`// Point at the captured immutable outer variable`

			`fn foo(mut f: Box<FnMut()>) {`
			`f();`
			`}`

			`fn main() {`
			`let mut y = true;`
			`foo(Box::new(move \|\| y = false) as Box<_>); //~ ERROR cannot assign to captured outer variable`
			`}`