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use std::collections::hash_set::Iter;
use std::collections::HashSet;
fn iter_to_vec<'b, X>(i: Iter<'b, X>) -> Vec<X> {
let i = i.map(|x| x.clone());
i.collect() //~ ERROR E0277
}
fn main() {
let scores = vec![(0, 0)]
.iter()
.map(|(a, b)| {
a + b;
});
println!("{}", scores.sum::<i32>()); //~ ERROR E0277
println!(
"{}",
vec![0, 1]
.iter()
.map(|x| x * 2)
.map(|x| x as f64)
.map(|x| x as i64)
.filter(|x| *x > 0)
.map(|x| { x + 1 })
.map(|x| { x; })
.sum::<i32>(), //~ ERROR E0277
);
println!(
"{}",
vec![0, 1]
.iter()
.map(|x| x * 2)
.map(|x| x as f64)
.filter(|x| *x > 0.0)
.map(|x| { x + 1.0 })
.sum::<i32>(), //~ ERROR E0277
);
println!("{}", vec![0, 1].iter().map(|x| { x; }).sum::<i32>()); //~ ERROR E0277
println!("{}", vec![(), ()].iter().sum::<i32>()); //~ ERROR E0277
let a = vec![0];
let b = a.into_iter();
let c = b.map(|x| x + 1);
let d = c.filter(|x| *x > 10 );
let e = d.map(|x| {
x + 1;
});
let f = e.filter(|_| false);
let g: Vec<i32> = f.collect(); //~ ERROR E0277
let mut s = HashSet::new();
s.insert(1u8);
println!("{:?}", iter_to_vec(s.iter()));
}
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