fn-error-context 0.2.1

An attribute macro to add context to errors from a function.
Documentation 
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use fn_error_context::context;

#[context("context")]
fn do_stuff(arg: String) -> anyhow::Result<()> {
    anyhow::bail!("error {}", arg)
}

fn main() {
    assert_eq!(
        format!("{:#}", do_stuff("hello".to_owned()).unwrap_err()),
        "context: error hello"
    );
}