Enum ExtensionExitCode 

pub enum ExtensionExitCode {
    Ok,
    Error(&'static str),
}

Return codes for native extensions

Variants

Ok

When the extension returns successfully

Error(&'static str)

If the extension encounters an error, it should return this with an explanation.

use dlauncher::extension::ExtensionExitCode;
ExtensionExitCode::Error("Failed to do something");