diff options
Diffstat (limited to 'src/test/ui/borrowck/borrow-immutable-upvar-mutation.rs')
-rw-r--r-- | src/test/ui/borrowck/borrow-immutable-upvar-mutation.rs | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/src/test/ui/borrowck/borrow-immutable-upvar-mutation.rs b/src/test/ui/borrowck/borrow-immutable-upvar-mutation.rs deleted file mode 100644 index a3350024e..000000000 --- a/src/test/ui/borrowck/borrow-immutable-upvar-mutation.rs +++ /dev/null @@ -1,56 +0,0 @@ -#![feature(unboxed_closures, tuple_trait)] - -// Tests that we can't assign to or mutably borrow upvars from `Fn` -// closures (issue #17780) - -fn set(x: &mut usize) { - *x = 5; -} - -fn to_fn<A: std::marker::Tuple, F: Fn<A>>(f: F) -> F { - f -} -fn to_fn_mut<A: std::marker::Tuple, F: FnMut<A>>(f: F) -> F { - f -} - -fn main() { - // By-ref captures - { - let mut x = 0; - let _f = to_fn(|| x = 42); //~ ERROR cannot assign - - let mut y = 0; - let _g = to_fn(|| set(&mut y)); //~ ERROR cannot borrow - - let mut z = 0; - let _h = to_fn_mut(|| { - set(&mut z); - to_fn(|| z = 42); //~ ERROR cannot assign - }); - } - - // By-value captures - { - let mut x = 0; - let _f = to_fn(move || x = 42); //~ ERROR cannot assign - - let mut y = 0; - let _g = to_fn(move || set(&mut y)); //~ ERROR cannot borrow - - let mut z = 0; - let _h = to_fn_mut(move || { - set(&mut z); - to_fn(move || z = 42); - //~^ ERROR cannot assign - }); - } -} - -fn foo() -> Box<dyn Fn() -> usize> { - let mut x = 0; - Box::new(move || { - x += 1; //~ ERROR cannot assign - x - }) -} |