Enum StopReason 

pub enum StopReason<'a> {
    End(ExitCode),
    Eof,
    Exception(LineCol, String),
    UpcallAsync(UpcallHandler<'a>),
    Yield,
}

Representation of termination states from program execution.

Variants

End(ExitCode)

Execution terminated due to an END instruction.

Eof

Execution terminated due to natural fallthrough.

Exception(LineCol, String)

Execution stopped due to an instruction-level exception.

UpcallAsync(UpcallHandler<'a>)

Execution stopped due to an asynchronous upcall that requires service from the caller.

Yield

Execution stopped to yield control back to the caller.