Struct std::process::ExitCode

pub struct ExitCode(_);

🔬 This is a nightly-only experimental API. (process_exitcode_placeholder #48711)

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

pub const SUCCESS: ExitCode

🔬 This is a nightly-only experimental API. (process_exitcode_placeholder #48711)

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

🔬 This is a nightly-only experimental API. (process_exitcode_placeholder #48711)

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

fn report(self) -> i32

🔬 This is a nightly-only experimental API. (termination_trait_lib #43301)

Is called to get the representation of the value as status code. This status code is returned to the operating system.

impl Copy for ExitCode

impl Debug for ExitCode

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Clone for ExitCode

fn clone(&self) -> ExitCode

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.