[rustc.git] / compiler / rustc_span / src / fatal_error.rs

/// Used as a return value to signify a fatal error occurred. (It is also
/// used as the argument to panic at the moment, but that will eventually
/// not be true.)
#[derive(Copy, Clone, Debug)]
#[must_use]
pub struct FatalError;

pub struct FatalErrorMarker;

// Don't implement Send on FatalError. This makes it impossible to panic!(FatalError).
// We don't want to invoke the panic handler and print a backtrace for fatal errors.
impl !Send for FatalError {}

impl FatalError {
    pub fn raise(self) -> ! {
        std::panic::resume_unwind(Box::new(FatalErrorMarker))
    }
}

impl std::fmt::Display for FatalError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "fatal error")
    }
}

impl std::error::Error for FatalError {}
Commit	Line	Data
60c5eb7d XL	1	/// Used as a return value to signify a fatal error occurred. (It is also
	2	/// used as the argument to panic at the moment, but that will eventually
	3	/// not be true.)
	4	#[derive(Copy, Clone, Debug)]
	5	#[must_use]
	6	pub struct FatalError;
	7
	8	pub struct FatalErrorMarker;
	9
	10	// Don't implement Send on FatalError. This makes it impossible to panic!(FatalError).
	11	// We don't want to invoke the panic handler and print a backtrace for fatal errors.
	12	impl !Send for FatalError {}
	13
	14	impl FatalError {
	15	pub fn raise(self) -> ! {
	16	std::panic::resume_unwind(Box::new(FatalErrorMarker))
	17	}
	18	}
	19
	20	impl std::fmt::Display for FatalError {
	21	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
5e7ed085	22	write!(f, "fatal error")
60c5eb7d XL	23	}
	24	}
	25
dfeec247	26	impl std::error::Error for FatalError {}