mirror of https://github.com/rust-lang/rust
83 lines
2.9 KiB
Rust
83 lines
2.9 KiB
Rust
// Test that we error if a slice is modified after it has been bounds checked
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// and before we actually index it.
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fn modify_before_assert_slice_slice(x: &[&[i32]]) -> i32 {
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let mut x = x;
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let z: &[i32] = &[1, 2, 3];
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let y: &[&[i32]] = &[z];
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x[{ x = y; 0 }][2] // OK we haven't checked any bounds before we index `x`.
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}
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fn modify_before_assert_array_slice(x: &[&[i32]; 3]) -> i32 {
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let mut x = x;
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let z: &[i32] = &[1, 2, 3];
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let y: &[&[i32]; 3] = &[z, z, z];
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x[{ x = y; 0 }][2] // OK we haven't checked any bounds before we index `x`.
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}
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fn modify_before_assert_slice_array(x: &[&[i32; 3]]) -> i32 {
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let mut x = x;
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let z: &[i32; 3] = &[1, 2, 3];
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let y: &[&[i32; 3]] = &[z];
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x[{ x = y; 0 }][2] // OK we haven't checked any bounds before we index `x`.
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}
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fn modify_before_assert_array_array(x: &[&[i32; 3]; 3]) -> i32 {
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let mut x = x;
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let z: &[i32; 3] = &[1, 2, 3];
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let y: &[&[i32; 3]; 3] = &[z, z, z];
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x[{ x = y; 0 }][2] // OK we haven't checked any bounds before we index `x`.
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}
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fn modify_after_assert_slice_slice(x: &[&[i32]]) -> i32 {
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let mut x = x;
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let z: &[i32] = &[1, 2, 3];
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let y: &[&[i32]] = &[&z];
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x[1][{ x = y; 2}] //~ ERROR cannot assign `x` in indexing expression
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}
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fn modify_after_assert_array_slice(x: &[&[i32]; 1]) -> i32 {
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let mut x = x;
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let z: &[i32] = &[1, 2, 3];
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let y: &[&[i32]; 1] = &[&z];
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x[0][{ x = y; 2}] // OK cannot invalidate a fixed-size array bounds check
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}
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fn modify_after_assert_slice_array(x: &[&[i32; 3]]) -> i32 {
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let mut x = x;
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let z: &[i32; 3] = &[1, 2, 3];
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let y: &[&[i32; 3]] = &[&z];
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x[1][{ x = y; 2}] //~ ERROR cannot assign `x` in indexing expression
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}
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fn modify_after_assert_array_array(x: &[&[i32; 3]; 1]) -> i32 {
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let mut x = x;
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let z: &[i32; 3] = &[1, 2, 3];
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let y: &[&[i32; 3]; 1] = &[&z];
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x[0][{ x = y; 2}] // OK cannot invalidate a fixed-size array bounds check
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}
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fn modify_after_assert_slice_slice_array(x: &[&[[i32; 1]]]) -> i32 {
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let mut x = x;
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let z: &[[i32; 1]] = &[[1], [2], [3]];
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let y: &[&[[i32; 1]]] = &[&z];
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x[1][{ x = y; 2}][0] //~ ERROR cannot assign `x` in indexing expression
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}
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fn modify_after_assert_slice_slice_slice(x: &[&[&[i32]]]) -> i32 {
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let mut x = x;
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let z: &[&[i32]] = &[&[1], &[2], &[3]];
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let y: &[&[&[i32]]] = &[z];
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x[1][{ x = y; 2}][0] //~ ERROR cannot assign `x` in indexing expression
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}
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fn main() {
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println!("{}", modify_after_assert_slice_array(&[&[4, 5, 6], &[9, 10, 11]]));
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println!("{}", modify_after_assert_slice_slice(&[&[4, 5, 6], &[9, 10, 11]]));
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println!("{}", modify_after_assert_slice_slice_array(&[&[[4], [5], [6]], &[[9], [10], [11]]]));
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println!("{}", modify_after_assert_slice_slice_slice(
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&[&[&[4], &[5], &[6]], &[&[9], &[10], &[11]]]),
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);
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}
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