8b59542acc
The changes reflected in this commit (requested in PR #2790) are as follows: - Extended `INDEXING_SLICING` documentation to include the array type so that it is clearer when indexing operations are allowed. - Variable `ty` defined identically in multiple scopes was moved to an outer scope so it's only defined once. - Added a missing return statement to ensure only one lint is triggered by a scenario. - Prettified match statement with a `let` clause. (I learned something new!) - Added `&x[5..].iter().map(|x| 2 * x).collect::<Vec<i32>>()` and `&x[2..].iter().map(|x| 2 * x).collect::<Vec<i32>>()` to the test cases. The first _should trigger the lint/stderr_ and the second _should not_.
63 lines
1.1 KiB
Rust
63 lines
1.1 KiB
Rust
#![feature(plugin)]
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#![warn(indexing_slicing)]
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#![warn(out_of_bounds_indexing)]
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#![allow(no_effect, unnecessary_operation)]
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fn main() {
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let x = [1, 2, 3, 4];
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let index: usize = 1;
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let index_from: usize = 2;
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let index_to: usize = 3;
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x[index];
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&x[index_from..index_to];
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&x[index_from..][..index_to];
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&x[index..];
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&x[..index];
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x[0];
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x[3];
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x[4];
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x[1 << 3];
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&x[1..5];
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&x[1..][..5];
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&x[0..3];
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&x[0..][..3];
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&x[0..].get(..3); // Ok
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&x[0..=4];
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&x[..=4];
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&x[..];
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&x[1..];
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&x[4..];
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&x[5..];
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&x[..4];
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&x[..5];
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&x[5..].iter().map(|x| 2 * x).collect::<Vec<i32>>();
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&x[2..].iter().map(|x| 2 * x).collect::<Vec<i32>>(); // Ok
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let y = &x;
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y[0];
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&y[1..2];
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&y[..];
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&y[0..=4];
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&y[..=4];
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let empty: [i8; 0] = [];
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empty[0];
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&empty[1..5];
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&empty[0..=4];
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&empty[..=4];
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&empty[..];
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&empty[0..];
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&empty[0..0];
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&empty[0..=0];
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&empty[..=0];
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&empty[..0];
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&empty[1..];
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&empty[..4];
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let v = vec![0; 5];
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v[0];
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v[10];
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&v[10..100];
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&v[10..];
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&v[..100];
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}
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