rust/tests/ui/indexing-requires-a-uint.rs
2023-01-11 09:32:08 +00:00

15 lines
445 B
Rust

// Make sure that indexing an array is only valid with a `usize`, not any other
// integral type.
fn main() {
fn bar<T>(_: T) {}
[0][0u8]; //~ ERROR: the type `[{integer}]` cannot be indexed by `u8`
[0][0]; // should infer to be a usize
let i = 0; // i is an IntVar
[0][i]; // i should be locked to usize
bar::<isize>(i); // i should not be re-coerced back to an isize
//~^ ERROR: mismatched types
}