Macro span_err 

macro_rules! span_err {
    ($($arg:tt)*) => { ... };
}

Sets the current span status to error with a formatted message.

Use this to mark the current span as failed with a descriptive error message.

Note: execution will continue after this macro has been called.

Examples

use apollo_opentelemetry::{span, span_err};

fn process(id: u64) {
    span!("process", || {
        span_err!("failed to process id {}", id);
    });
}