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 {arg}", arg = arg)]
fn do_stuff(arg: u32) -> anyhow::Result<()> {
    anyhow::bail!("error {}", arg)
}

fn main() {
    assert_eq!(
        format!("{:#}", do_stuff(1).unwrap_err()),
        "context 1: error 1"
    );
}