Struct Slots 

pub struct Slots<'a, B> { /* private fields */ }

The slots of a vector that a writer fills in order: one call’s part of an extended vector, or the items that Slots::append adds.

Implementations

impl<B> Slots<'_, B>

pub fn append<T>( out: &mut Vec<B>, n: usize, write: impl FnOnce(&mut Slots<'_, B>) -> T, ) -> T

Appends n items to out on this thread, and gives write’s result. write fills the slots in order. Where it leaves any unfilled, append panics and out keeps its length.

pub fn pairs<X: Copy, Y: Copy>( &mut self, x: Arg<'_, X>, y: Arg<'_, Y>, n: usize, f: impl Fn(X, Y) -> (B, bool), ) -> bool

Writes the n results of pairs after the items already written, on this thread, and gives whether every result succeeded. Panics where they don’t fit.

pub fn copy(&mut self, items: &[B])

where B: Copy,

Writes items after the items already written, on this thread. Panics where they don’t fit.

pub unsafe fn fill( &mut self, n: usize, write: impl FnOnce(&mut [MaybeUninit<B>]) -> bool, ) -> bool

write’s result for the next n slots, which it must fill. They then count as written. Panics where they don’t fit.

Safety

write must initialize every slot it receives before returning, whether it returns true or false.