Macro anyhow::bail [−][src]
macro_rules! bail { ($msg:literal $(,)?) => { ... }; ($err:expr $(,)?) => { ... }; ($fmt:expr, $($arg:tt)*) => { ... }; }
Return early with an error.
This macro is equivalent to return Err(From::from($err))
.
Example
if !has_permission(user, resource) { bail!("permission denied for accessing {}", resource); }
#[derive(Error, Debug)] enum ScienceError { #[error("recursion limit exceeded")] RecursionLimitExceeded, ... } if depth > MAX_DEPTH { bail!(ScienceError::RecursionLimitExceeded); }