Macro tari_comms::log_if_error

macro_rules! log_if_error {
    (level:$level:ident, target:$target:expr, $expr:expr, $msg:expr, $($args:tt),* $(,)*) => { ... };
    (target:$target:expr, $expr:expr, $msg:expr, $($args:tt),* $(,)*) => { ... };
    (level:$level:ident, $expr:expr, $msg:expr, $($args:tt),* $(,)*) => { ... };
    ($expr:expr, $msg:expr, $($args:tt)* $(,)*) => { ... };
}

Log an error if an Err is returned from the $expr. If the given expression is Ok(v), Some(v) is returned, otherwise None is returned (same as Result::ok). Useful in cases where the error should be logged and ignored. instead of writing if let Err(err) = my_error_call() { error!(...) }, you can write log_if_error!(my_error_call())

# use tari_common::log_if_error;
let opt = log_if_error!(target: "docs", level: debug, Result::<(), _>::Err("this will be logged as 'error' tag"), "Error: {error}");
assert_eq!(opt, None);