Struct runestick::BorrowRef [−][src]
pub struct BorrowRef<'a, T: ?Sized + 'a> { /* fields omitted */ }
Expand description
Guard for a data borrowed from a slot in the virtual machine.
These guards are necessary, since we need to guarantee certain forms of access depending on what we do. Releasing the guard releases the access.
Implementations
Map the reference.
Examples
use runestick::{BorrowRef, Shared}; let vec = Shared::<Vec<u32>>::new(vec![1, 2, 3, 4]); let vec = vec.borrow_ref()?; let value: BorrowRef<[u32]> = BorrowRef::map(vec, |vec| &vec[0..2]); assert_eq!(&*value, &[1u32, 2u32][..]);
Try to map the reference to a projection.
Examples
use runestick::{BorrowRef, Shared}; let vec = Shared::<Vec<u32>>::new(vec![1, 2, 3, 4]); let vec = vec.borrow_ref()?; let mut value: Option<BorrowRef<[u32]>> = BorrowRef::try_map(vec, |vec| vec.get(0..2)); assert_eq!(value.as_deref(), Some(&[1u32, 2u32][..]));