29 lines
905 B
Rust
29 lines
905 B
Rust
use rand::prelude::*;
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pub struct RandomCharIter<T: Rng>(T);
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impl<T: Rng> RandomCharIter<T> {
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pub fn new(rng: T) -> Self {
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Self(rng)
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}
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}
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impl<T: Rng> Iterator for RandomCharIter<T> {
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type Item = char;
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fn next(&mut self) -> Option<Self::Item> {
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match self.0.gen_range(0..100) {
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// whitespace
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0..=4 => ['\n'].choose(&mut self.0).copied(),
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// // two-byte greek letters
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// 20..=32 => char::from_u32(self.0.gen_range(('α' as u32)..('ω' as u32 + 1))),
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// // three-byte characters
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// 33..=45 => ['✋', '✅', '❌', '❎', '⭐'].choose(&mut self.0).copied(),
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// // four-byte characters
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// 46..=58 => ['🍐', '🏀', '🍗', '🎉'].choose(&mut self.0).copied(),
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// // ascii letters
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_ => Some(self.0.gen_range(b'a'..b'z' + 1).into()),
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}
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}
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}
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