rust/tests/ui/indexing_slicing_slice.rs
2020-02-03 15:09:17 +09:00

38 lines
1.1 KiB
Rust

#![warn(clippy::indexing_slicing)]
// We also check the out_of_bounds_indexing lint here, because it lints similar things and
// we want to avoid false positives.
#![warn(clippy::out_of_bounds_indexing)]
#![allow(clippy::no_effect, clippy::unnecessary_operation)]
fn main() {
let x = [1, 2, 3, 4];
let index: usize = 1;
let index_from: usize = 2;
let index_to: usize = 3;
&x[index..];
&x[..index];
&x[index_from..index_to];
&x[index_from..][..index_to]; // Two lint reports, one for [index_from..] and another for [..index_to].
&x[5..][..10]; // Two lint reports, one for out of bounds [5..] and another for slicing [..10].
&x[0..][..3];
&x[1..][..5];
&x[0..].get(..3); // Ok, should not produce stderr.
&x[0..3]; // Ok, should not produce stderr.
let y = &x;
&y[1..2];
&y[0..=4];
&y[..=4];
&y[..]; // Ok, should not produce stderr.
let v = vec![0; 5];
&v[10..100];
&x[10..][..100]; // Two lint reports, one for [10..] and another for [..100].
&v[10..];
&v[..100];
&v[..]; // Ok, should not produce stderr.
}