Macro eyre::format_err
source · macro_rules! format_err {
($msg:literal $(,)?) => { ... };
($err:expr $(,)?) => { ... };
($fmt:expr, $($arg:tt)*) => { ... };
}
Expand description
Construct an ad-hoc error from a string.
This evaluates to an Error
. It can take either just a string, or a format
string with arguments. It also can take any custom type which implements
Debug
and Display
.
Example
use eyre::{eyre, Result};
fn lookup(key: &str) -> Result<V> {
if key.len() != 16 {
return Err(eyre!("key length must be 16 characters, got {:?}", key));
}
// ...
}