rune/grammar/
flavor.rs

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1use core::ops::{Deref, DerefMut};
2
3use syntree::{Index, Storage, TreeIndex, Width};
4
5use crate::alloc::{self, Vec};
6
7pub(crate) struct Flavor;
8
9pub struct AllocVec<T> {
10    inner: Vec<T>,
11}
12
13impl<T> Deref for AllocVec<T> {
14    type Target = [T];
15
16    #[inline]
17    fn deref(&self) -> &Self::Target {
18        &self.inner
19    }
20}
21
22impl<T> DerefMut for AllocVec<T> {
23    #[inline]
24    fn deref_mut(&mut self) -> &mut Self::Target {
25        &mut self.inner
26    }
27}
28
29impl<T> Storage<T> for AllocVec<T> {
30    const EMPTY: Self = Self { inner: Vec::new() };
31
32    type Error = alloc::Error;
33
34    #[inline]
35    fn with_capacity(capacity: usize) -> alloc::Result<Self> {
36        Ok(Self {
37            inner: Vec::try_with_capacity(capacity)?,
38        })
39    }
40
41    #[inline]
42    fn capacity(&self) -> usize {
43        self.inner.capacity()
44    }
45
46    #[inline]
47    fn push(&mut self, item: T) -> alloc::Result<()> {
48        self.inner.try_push(item)
49    }
50}
51
52impl syntree::Flavor for Flavor {
53    type Error = alloc::Error;
54    type Index = u32;
55    type Length = <u32 as Index>::Length;
56    type Width = usize;
57    type Pointer = <usize as Width>::Pointer;
58    type Storage<T> = AllocVec<T>;
59    type Indexes = AllocVec<TreeIndex<Self>>;
60}
rune/grammar/flavor.rs

rune/grammar/
flavor.rs
