bitcode/
u8_char.rs

1use crate::coder::{Buffer, Encoder};
2use crate::derive::Encode;
3use crate::fast::VecImpl;
4use alloc::vec::Vec;
5use core::num::NonZeroUsize;
6
7/// Represents a single byte of a string, unlike u8 which represents an integer.
8#[derive(Copy, Clone)]
9#[repr(transparent)]
10pub struct U8Char(pub u8);
11
12// Could derive with bytemuck/derive.
13unsafe impl bytemuck::Zeroable for U8Char {}
14unsafe impl bytemuck::Pod for U8Char {}
15
16impl Encode for U8Char {
17    type Encoder = U8CharEncoder;
18}
19
20#[derive(Default)]
21pub struct U8CharEncoder(VecImpl<U8Char>);
22
23impl Encoder<U8Char> for U8CharEncoder {
24    #[inline(always)]
25    fn as_primitive(&mut self) -> Option<&mut VecImpl<U8Char>> {
26        Some(&mut self.0)
27    }
28
29    #[inline(always)]
30    fn encode(&mut self, _: &U8Char) {
31        unimplemented!(); // StrEncoder only uses Encoder::as_primitive.
32    }
33}
34
35impl Buffer for U8CharEncoder {
36    fn collect_into(&mut self, out: &mut Vec<u8>) {
37        out.extend_from_slice(bytemuck::must_cast_slice(self.0.as_slice()));
38        self.0.clear();
39    }
40
41    fn reserve(&mut self, _: NonZeroUsize) {
42        unimplemented!(); // StrEncoder only uses Encoder::as_primitive.
43    }
44}