Function at 

pub fn at<E>(err: E) -> At<E>

Wrap any value in At<E> and capture the caller’s location.

This function works with any type, not just Error types. For types implementing Error, you can also use .start_at(). For crate-aware tracing with GitHub links, use at!() instead.

Example

use whereat::{at, At};

#[derive(Debug)]
struct SimpleError { code: u32 }

fn fallible() -> Result<(), At<SimpleError>> {
    Err(at(SimpleError { code: 42 }))
}