spinoso_string/enc/
codepoints.rs

1use core::iter::FusedIterator;
2
3use super::{
4    ascii::{self, AsciiString},
5    binary::{self, BinaryString},
6    utf8::{self, Utf8String},
7};
8use crate::CodepointsError;
9
10#[derive(Default, Debug, Clone)]
11#[must_use = "this `Codepoint` is an `Iterator`, which should be consumed if constructed"]
12pub struct Codepoints<'a>(State<'a>);
13
14impl<'a> From<&'a AsciiString> for Codepoints<'a> {
15    fn from(value: &'a AsciiString) -> Self {
16        Self(State::Ascii(ascii::Codepoints::new(value)))
17    }
18}
19
20impl<'a> From<&'a BinaryString> for Codepoints<'a> {
21    fn from(value: &'a BinaryString) -> Self {
22        Self(State::Binary(binary::Codepoints::new(value)))
23    }
24}
25impl<'a> TryFrom<&'a Utf8String> for Codepoints<'a> {
26    type Error = CodepointsError;
27
28    fn try_from(s: &'a Utf8String) -> Result<Self, Self::Error> {
29        utf8::Codepoints::try_from(s.as_utf8_str()).map(|v| Self(State::Utf8(v)))
30    }
31}
32
33#[derive(Debug, Clone)]
34enum State<'a> {
35    Ascii(ascii::Codepoints<'a>),
36    Binary(binary::Codepoints<'a>),
37    Utf8(utf8::Codepoints<'a>),
38}
39
40impl Default for State<'_> {
41    fn default() -> Self {
42        Self::Ascii(ascii::Codepoints::default())
43    }
44}
45
46impl Iterator for Codepoints<'_> {
47    type Item = u32;
48
49    #[inline]
50    fn next(&mut self) -> Option<Self::Item> {
51        match self {
52            Self(State::Ascii(iter)) => iter.next(),
53            Self(State::Binary(iter)) => iter.next(),
54            Self(State::Utf8(iter)) => iter.next(),
55        }
56    }
57}
58
59impl FusedIterator for Codepoints<'_> {}
spinoso_string/enc/codepoints.rs

spinoso_string/enc/
codepoints.rs
