Comment by afdbcreid

I don't like having to wrap my function with a macro, with all disadvantages (e.g. worse IDE support), just to get error location. Especially given we can do this without macros at all:

    use std::error::Error as StdError;
    use std::panic::Location;
    use std::fmt;

    #[derive(Debug)]
    pub struct MyError {
        pub error: Box<dyn StdError + Send + Sync>,
        pub location: &'static Location<'static>,
    }
    
    impl<E: StdError + Send + Sync + 'static> From<E> for MyError {
        #[track_caller]
        #[inline]
        fn from(error: E) -> Self {
            Self {
                error: Box::new(error),
                location: Location::caller(),
            }
        }
    }
    
    impl fmt::Display for MyError {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            write!(f, "{}, {}", self.error, self.location)
        }
    }

We can also optimize this more (e.g. a simple optimization to be two words instead of three: https://play.rust-lang.org/?version=stable&mode=debug&editio.... Also allows opting `Send` and `Sync` out or using non-`'static` lifetimes), but this works as a baseline. The only disadvantage is that if called in a function with `#[track_caller]` this will report the location of the caller... But this is something I can live with.