Sha256: b1d1740d65ad0b9f296342afbac0c6994eb2fa0ea7dba4882b64b246e309d9da
Contents?: true
Size: 786 Bytes
Versions: 19
Compression:
Stored size: 786 Bytes
Contents
use super::*;
use std::marker::PhantomData;
/// `Weak` holds a non-owning reference to an object.
#[derive(Clone, PartialEq, Eq, Default)]
pub struct Weak<I: ComInterface>(Option<crate::imp::IWeakReference>, PhantomData<I>);
impl<I: ComInterface> Weak<I> {
/// Creates a new `Weak` object without any backing object.
pub fn new() -> Self {
Self(None, PhantomData)
}
/// Attempts to upgrade the weak reference to a strong reference.
pub fn upgrade(&self) -> Option<I> {
self.0.as_ref().and_then(|inner| unsafe { inner.Resolve().ok() })
}
pub(crate) fn downgrade(source: &crate::imp::IWeakReferenceSource) -> Result<Self> {
let reference = unsafe { source.GetWeakReference().ok() };
Ok(Self(reference, PhantomData))
}
}
Version data entries
19 entries across 19 versions & 1 rubygems