kvdb_web/
error.rs

1// Copyright 2020 Parity Technologies
2//
3// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
4// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
5// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
6// option. This file may not be copied, modified, or distributed
7// except according to those terms.
8
9//! Errors that can occur when working with IndexedDB.
10
11use std::fmt;
12
13/// An error that occurred when working with IndexedDB.
14#[derive(Clone, PartialEq, Debug)]
15pub enum Error {
16	/// Accessing a Window has failed.
17	/// Are we in a WebWorker?
18	WindowNotAvailable,
19	/// IndexedDB is not supported by your browser.
20	NotSupported(String),
21	/// This enum may grow additional variants,
22	/// so this makes sure clients don't count on exhaustive matching.
23	/// (Otherwise, adding a new variant could break existing code.)
24	#[doc(hidden)]
25	__Nonexhaustive,
26}
27
28impl std::error::Error for Error {
29	fn description(&self) -> &str {
30		match *self {
31			Error::WindowNotAvailable => "Accessing a Window has failed",
32			Error::NotSupported(_) => "IndexedDB is not supported by your browser",
33			Error::__Nonexhaustive => unreachable!(),
34		}
35	}
36}
37
38impl fmt::Display for Error {
39	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
40		match *self {
41			Error::WindowNotAvailable => write!(f, "Accessing a Window has failed"),
42			Error::NotSupported(ref err) => write!(f, "IndexedDB is not supported by your browser: {}", err,),
43			Error::__Nonexhaustive => unreachable!(),
44		}
45	}
46}
kvdb_web/error.rs

kvdb_web/
error.rs
