28 lines
533 B
Rust
28 lines
533 B
Rust
//@ edition:2021
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//@ run-pass
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#[derive(Debug, PartialEq, Eq)]
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pub enum Color {
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RGB(u8, u8, u8),
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}
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fn main() {
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let mut color = Color::RGB(0, 0, 0);
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let mut red = |v| {
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let Color::RGB(ref mut r, _, _) = color;
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*r = v;
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};
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let mut green = |v| {
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let Color::RGB(_, ref mut g, _) = color;
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*g = v;
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};
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let mut blue = |v| {
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let Color::RGB(_, _, ref mut b) = color;
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*b = v;
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};
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red(1);
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green(2);
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blue(3);
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assert_eq!(Color::RGB(1, 2, 3), color);
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}
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