any_fn/
error.rs

1use core::{
2    cell::{BorrowError, BorrowMutError},
3    error::Error,
4    fmt::{self, Display, Formatter},
5};
6
7/// An error.
8#[derive(Debug)]
9pub enum AnyFnError {
10    /// A borrow failure.
11    Borrow(BorrowError),
12    /// A mutable borrow failure.
13    BorrowMut(BorrowMutError),
14    /// An object downcast failure.
15    Downcast,
16}
17
18impl From<BorrowError> for AnyFnError {
19    fn from(error: BorrowError) -> Self {
20        Self::Borrow(error)
21    }
22}
23
24impl From<BorrowMutError> for AnyFnError {
25    fn from(error: BorrowMutError) -> Self {
26        Self::BorrowMut(error)
27    }
28}
29
30impl Error for AnyFnError {}
31
32impl Display for AnyFnError {
33    fn fmt(&self, formatter: &mut Formatter) -> fmt::Result {
34        match self {
35            Self::Downcast => write!(formatter, "cannot downcast object"),
36            Self::Borrow(error) => write!(formatter, "{error}"),
37            Self::BorrowMut(error) => write!(formatter, "{error}"),
38        }
39    }
40}
any_fn/error.rs

any_fn/
error.rs
