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use std::any::Any;
use std::cell::RefCell;
thread_local!(static LAST_ERROR: RefCell<Option<Box<dyn Any + Send>>> = {
RefCell::new(None)
});
pub fn wrap<T, F: FnOnce() -> T + std::panic::UnwindSafe>(f: F) -> Option<T> {
use std::panic;
if LAST_ERROR.with(|slot| slot.borrow().is_some()) {
return None;
}
match panic::catch_unwind(f) {
Ok(ret) => Some(ret),
Err(e) => {
LAST_ERROR.with(move |slot| {
*slot.borrow_mut() = Some(e);
});
None
}
}
}
pub fn check() {
let err = LAST_ERROR.with(|slot| slot.borrow_mut().take());
if let Some(err) = err {
panic!(err)
}
}
pub fn panicked() -> bool {
LAST_ERROR.with(|slot| slot.borrow().is_some())
}