Macro pnmixerlib::try_e
[−]
[src]
macro_rules! try_e { ($expr:expr) => { ... }; ($expr:expr, $fmt:expr) => { ... }; ($expr:expr, $fmt:expr, $($arg:tt)+) => { ... }; }
Try to unwrap a Result<T, E>
. If there is a value T
, yield it,
otherwise print an error and exit the program.