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//@ run-rustfix
#![allow(dead_code, path_statements)]
fn foo1(s: &str) -> impl Iterator<Item = String> + '_ {
None.into_iter()
.flat_map(move |()| s.chars().map(|c| format!("{}{}", c, s)))
//~^ ERROR captured variable cannot escape `FnMut` closure body
//~| HELP consider adding 'move' keyword before the nested closure
}
fn foo2(s: &str) -> impl Sized + '_ {
move |()| s.chars().map(|c| format!("{}{}", c, s))
//~^ ERROR lifetime may not live long enough
//~| HELP consider adding 'move' keyword before the nested closure
}
pub struct X;
pub fn foo3<'a>(
bar: &'a X,
) -> impl Iterator<Item = ()> + 'a {
Some(()).iter().flat_map(move |()| {
Some(()).iter().map(|()| { bar; }) //~ ERROR captured variable cannot escape
//~^ HELP consider adding 'move' keyword before the nested closure
})
}
fn main() {}
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