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|
LL| |//@ edition: 2018
LL| |
LL| |macro_rules! bail {
LL| | ($msg:literal $(,)?) => {
LL| | if $msg.len() > 0 {
LL| | println!("no msg");
LL| | } else {
LL| | println!($msg);
LL| | }
LL| | return Err(String::from($msg));
LL| | };
LL| |}
LL| |
LL| |macro_rules! on_error {
LL| | ($value:expr, $error_message:expr) => {
LL| 0| $value.or_else(|e| {
LL| 0| // This closure, which is declared in a macro, should be instrumented.
LL| 0| let message = format!($error_message, e);
LL| 0| if message.len() > 0 {
LL| 0| println!("{}", message);
LL| 0| Ok(String::from("ok"))
LL| | } else {
LL| 0| bail!("error");
LL| | }
LL| 0| })
LL| | };
LL| |}
LL| |
LL| 1|fn load_configuration_files() -> Result<String, String> {
LL| 1| Ok(String::from("config"))
LL| 1|}
LL| |
LL| 1|pub fn main() -> Result<(), String> {
LL| 1| println!("Starting service");
LL| 1| let config = on_error!(load_configuration_files(), "Error loading configs: {}")?;
^0
LL| |
LL| 1| let startup_delay_duration = String::from("arg");
LL| 1| let _ = (config, startup_delay_duration);
LL| 1| Ok(())
LL| 1|}
|
