rust/src/test/ui/self/self-re-assign.rs

// run-pass
// Ensure assigning an owned or managed variable to itself works. In particular,
// that we do not glue_drop before we glue_take (#3290).

#![feature(box_syntax)]

use std::rc::Rc;

pub fn main() {
   let mut x: Box<_> = box 3;
   x = x;
   assert_eq!(*x, 3);

   let mut x = Rc::new(3);
   x = x;
   assert_eq!(*x, 3);
}
Add `// run-pass` annotations to all the tests under `ui/run-pass/`. (I may have accidentally added it to some auxilliary crates as well; my emacs-macro-based methodology was pretty crude.) 2018-08-30 14:18:55 +02:00			`// run-pass`
Test ordering of glue_drop and glue_takew in self-re-assignment. Closes #3290. 2014-02-17 11:53:12 +13:00			`// Ensure assigning an owned or managed variable to itself works. In particular,`
			`// that we do not glue_drop before we glue_take (#3290).`

fallout: run-pass tests that use box. (many could be ported to `Box::new` instead in the future.) 2015-01-08 02:25:56 +01:00			`#![feature(box_syntax)]`

Test ordering of glue_drop and glue_takew in self-re-assignment. Closes #3290. 2014-02-17 11:53:12 +13:00			`use std::rc::Rc;`

			`pub fn main() {`
Add `: Box<_>` or `::Box<_>` type annotations to various places. This is the kind of change that one is expected to need to make to accommodate overloaded-`box`. ---- Note that this is not all of the changes necessary to accommodate Issue 22181. It is merely the subset of those cases where there was already a let-binding in place that made it easy to add the necesasry type ascription. (For unnamed intermediate `Box` values, one must go down a different route; `Box::new` is the option that maximizes portability, but has potential inefficiency depending on whether the call is inlined.) ---- There is one place worth note, `run-pass/coerce-match.rs`, where I used an ugly form of `Box<_>` type ascription where I would have preferred to use `Box::new` to accommodate overloaded-`box`. I deliberately did not use `Box::new` here, because that is already done in coerce-match-calls.rs. ---- Precursor for overloaded-`box` and placement-`in`; see Issue 22181. 2015-02-17 21:41:32 +01:00			`let mut x: Box<_> = box 3;`
Test ordering of glue_drop and glue_takew in self-re-assignment. Closes #3290. 2014-02-17 11:53:12 +13:00			`x = x;`
Use `assert_eq!` instead of `assert!` in tests 2015-06-07 21:00:38 +03:00			`assert_eq!(*x, 3);`
Test ordering of glue_drop and glue_takew in self-re-assignment. Closes #3290. 2014-02-17 11:53:12 +13:00
Remove all `i` suffixes 2015-01-25 22:05:03 +01:00			`let mut x = Rc::new(3);`
Test ordering of glue_drop and glue_takew in self-re-assignment. Closes #3290. 2014-02-17 11:53:12 +13:00			`x = x;`
Use `assert_eq!` instead of `assert!` in tests 2015-06-07 21:00:38 +03:00			`assert_eq!(*x, 3);`
Test ordering of glue_drop and glue_takew in self-re-assignment. Closes #3290. 2014-02-17 11:53:12 +13:00			`}`