enum_tryfrom/
lib.rs

1//! This crate defines types and traits for use with `enum-tryfrom-derive` See
2//! the documentation of that crate for usage details.
3#![cfg_attr(not(feature="std"), no_std)]
4
5#[cfg(feature="std")]
6extern crate core;
7
8use core::fmt::Display;
9
10#[derive(Debug,Default)]
11pub struct InvalidEnumValue(());
12
13const DESCRIPTION : &str = "Attempted to convert invalid value to enum";
14
15impl InvalidEnumValue {
16    pub fn new() -> Self {
17        InvalidEnumValue(())
18    }
19}
20
21impl Display for InvalidEnumValue {
22    fn fmt(&self, fmt: &mut core::fmt::Formatter) -> core::fmt::Result {
23        DESCRIPTION.fmt(fmt)
24    }
25}
26
27#[cfg(feature="std")]
28impl std::error::Error for InvalidEnumValue {
29    fn description(&self) -> &str {
30        DESCRIPTION
31    }
32}
33
34#[cfg(all(test, feature="std"))]
35mod tests {
36    use super::*;
37    use std::error::Error;
38
39    #[test]
40    fn test_description() {
41        assert_eq!(InvalidEnumValue::new().description(), DESCRIPTION);
42    }
43}
enum_tryfrom/lib.rs

enum_tryfrom/
lib.rs
