1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
use std::fmt; /// Error produced when an indexing operation is out of bounds or otherwise /// inapplicable. /// /// Carries no context information (to be as light as possible). #[derive(Copy, Debug, PartialEq)] pub struct IndexingError(()); #[inline] pub fn index_error() -> IndexingError { IndexingError(()) } impl Clone for IndexingError { fn clone(&self) -> Self { *self } } impl IndexingError { pub fn description(&self) -> &str { "index error" } } impl fmt::Display for IndexingError { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { f.write_str(self.description()) } }