54 lines
1.8 KiB
Rust
54 lines
1.8 KiB
Rust
#![feature(inline_const)]
|
|
#![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(
|
|
unconditional_panic,
|
|
clippy::no_effect,
|
|
clippy::unnecessary_operation,
|
|
clippy::useless_vec
|
|
)]
|
|
|
|
const ARR: [i32; 2] = [1, 2];
|
|
const REF: &i32 = &ARR[idx()]; // This should be linted, since `suppress-restriction-lint-in-const` default is false.
|
|
const REF_ERR: &i32 = &ARR[idx4()]; // Ok, let rustc handle const contexts.
|
|
|
|
const fn idx() -> usize {
|
|
1
|
|
}
|
|
const fn idx4() -> usize {
|
|
4
|
|
}
|
|
|
|
fn main() {
|
|
let x = [1, 2, 3, 4];
|
|
let index: usize = 1;
|
|
x[index];
|
|
x[4]; // Ok, let rustc's `unconditional_panic` lint handle `usize` indexing on arrays.
|
|
x[1 << 3]; // Ok, let rustc's `unconditional_panic` lint handle `usize` indexing on arrays.
|
|
|
|
x[0]; // Ok, should not produce stderr.
|
|
x[3]; // Ok, should not produce stderr.
|
|
x[const { idx() }]; // Ok, should not produce stderr.
|
|
x[const { idx4() }]; // Ok, let rustc's `unconditional_panic` lint handle `usize` indexing on arrays.
|
|
const { &ARR[idx()] }; // This should be linted, since `suppress-restriction-lint-in-const` default is false.
|
|
const { &ARR[idx4()] }; // This should be linted, since `suppress-restriction-lint-in-const` default is false.
|
|
|
|
let y = &x;
|
|
y[0]; // Ok, referencing shouldn't affect this lint. See the issue 6021
|
|
y[4]; // Ok, rustc will handle references too.
|
|
|
|
let v = vec![0; 5];
|
|
v[0];
|
|
v[10];
|
|
v[1 << 3];
|
|
|
|
const N: usize = 15; // Out of bounds
|
|
const M: usize = 3; // In bounds
|
|
x[N]; // Ok, let rustc's `unconditional_panic` lint handle `usize` indexing on arrays.
|
|
x[M]; // Ok, should not produce stderr.
|
|
v[N];
|
|
v[M];
|
|
}
|