mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 06:51:58 +00:00
27 lines
464 B
Rust
27 lines
464 B
Rust
use std::collections::HashSet;
|
|
|
|
struct Foo {
|
|
n: HashSet<isize>,
|
|
}
|
|
|
|
impl Foo {
|
|
pub fn foo<F>(&mut self, mut fun: F) where F: FnMut(&isize) {
|
|
for f in &self.n {
|
|
fun(f);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn bar(f: &mut Foo) {
|
|
f.foo(
|
|
//~^ ERROR cannot borrow `*f` as mutable
|
|
|a| { //~ ERROR closure requires unique access to `f`
|
|
f.n.insert(*a);
|
|
})
|
|
}
|
|
|
|
fn main() {
|
|
let mut f = Foo { n: HashSet::new() };
|
|
bar(&mut f);
|
|
}
|