rust/tests/compile-fail/for_loop.rs

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#![feature(plugin)]
#![plugin(clippy)]
#[deny(needless_range_loop)]
fn main() {
let vec = vec![1, 2, 3, 4];
let vec2 = vec![1, 2, 3, 4];
for i in 0..vec.len() { //~ERROR the loop variable `i` is only used to index `vec`.
println!("{}", vec[i]);
}
for i in 0..vec.len() { //~ERROR the loop variable `i` is used to index `vec`.
println!("{} {}", vec[i], i);
}
for i in 0..vec.len() { // not an error, indexing more than one variable
println!("{} {}", vec[i], vec2[i]);
}
}