Crate error_hook

error_hook is a library for automation to insert action at error conversion.

Example

use error_hook_attr::hook;

#[hook(e => println!("{e}"))]
fn test(a: i32, b: i32) -> error_hook::Result<i32> {
    a.checked_mul(b).ok_or(anyhow::anyhow!("overflow"))
}

fn main() -> anyhow::Result<()> {
    let _ = test(888888888, 888888888);
    //      ^^^^ this prints 'overflow'

    Ok(())
}

Enums

Error

Traits

IntoBoxed

　Trait to convert Err type of Result to dynamic trait object.

SameAs

for meta programming

Type Aliases

Result

Type alias for hook.