rust/src/test/ui/indexing-requires-a-uint.rs
2018-12-25 21:08:33 -07:00

15 lines
471 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 trait bound `u8: std::slice::SliceIndex<[{integer}]>` is not satisfied
[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
}