enum_methods/
util.rs

1use std::str;
2use syn::Ident;
3
4pub(crate) fn to_snake_case<S: AsRef<str>>(ident: &S) -> String {
5    let mut snake_case = String::new();
6
7    for (i, c) in ident.as_ref().chars().enumerate() {
8        if i > 0 && c.is_uppercase() {
9            snake_case.push('_');
10        }
11
12        snake_case.push(c.to_lowercase().next().unwrap());
13    }
14
15    snake_case
16}
17
18pub(crate) struct UniqueIdentifierIterator {
19    buffer: Vec<u8>,
20}
21
22impl UniqueIdentifierIterator {
23    pub(crate) fn new() -> Self {
24        UniqueIdentifierIterator {
25            buffer: vec!['a' as u8],
26        }
27    }
28}
29
30impl Iterator for UniqueIdentifierIterator {
31    type Item = Ident;
32
33    /// Generates infinite length strings from ASCII chars a-z
34    fn next(&mut self) -> Option<Self::Item> {
35        let ident = Ident::new(str::from_utf8(&self.buffer).unwrap());
36        let last_char = self.buffer.len() - 1;
37
38        if self.buffer[last_char] < 'z' as u8 {
39            self.buffer[last_char] += 1;
40        } else {
41            self.buffer.push('a' as u8);
42        }
43
44        Some(ident)
45    }
46}
enum_methods/util.rs

enum_methods/
util.rs
