[−][src]Struct std::process::ExitCode
This type represents the status code a process can return to its parent under normal termination.
Numeric values used in this type don't have portable meanings, and different platforms may mask different amounts of them.
For the platform's canonical successful and unsuccessful codes, see
the SUCCESS
and FAILURE
associated items.
Warning: While various forms of this were discussed in RFC #1937, it was ultimately cut from that RFC, and thus this type is more subject to change even than the usual unstable item churn.
Methods
impl ExitCode
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pub const SUCCESS: ExitCode
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The canonical ExitCode for successful termination on this platform.
Note that a ()
-returning main
implicitly results in a successful
termination, so there's no need to return this from main
unless
you're also returning other possible codes.
pub const FAILURE: ExitCode
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The canonical ExitCode for unsuccessful termination on this platform.
If you're only returning this and SUCCESS
from main
, consider
instead returning Err(_)
and Ok(())
respectively, which will
return the same codes (but will also eprintln!
the error).
Trait Implementations
impl Termination for ExitCode
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impl Debug for ExitCode
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impl Copy for ExitCode
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impl Clone for ExitCode
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Auto Trait Implementations
impl UnwindSafe for ExitCode
impl RefUnwindSafe for ExitCode
impl Unpin for ExitCode
impl Send for ExitCode
impl Sync for ExitCode
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
ⓘImportant traits for &'_ mut Ffn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,