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Add short-hand notation support for color! macro

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Co-authored-by: edwloef <edwin.frank.loeffler@gmail.com>
This commit is contained in:
Héctor Ramón Jiménez 2025-12-04 00:04:22 +01:00
parent 02c551259a
commit 4cef837e45
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GPG key ID: 7CC46565708259A7
1 changed files with 19 additions and 3 deletions
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22
core/src/color.rs
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@ -287,9 +287,18 @@ macro_rules! color {
$crate::Color::from_rgb8($r, $g, $b)
};
($r:expr, $g:expr, $b:expr, $a:expr) => {{ $crate::Color::from_rgba8($r, $g, $b, $a) }};
($hex:expr) => {{ $crate::color!($hex, 1.0) }};
($hex:expr, $a:expr) => {{
let hex = $hex as u32;
($hex:literal) => {{ $crate::color!($hex, 1.0) }};
($hex:literal, $a:expr) => {{
let mut hex = $hex as u32;
// Shorthand notation: 0x123
if stringify!($hex).len() == 5 {
let r = hex & 0xF00;
let g = hex & 0xF0;
let b = hex & 0xF;
hex = (r << 12) | (r << 8) | (g << 8) | (g << 4) | (b << 4) | b;
}
debug_assert!(hex <= 0xffffff, "color! value must not exceed 0xffffff");
@ -324,4 +333,11 @@ mod tests {
assert!("invalid".parse::<Color>().is_err());
}
const SHORTHAND: Color = color!(0x123);
#[test]
fn shorthand_notation() {
assert_eq!(SHORTHAND, Color::from_rgb8(0x11, 0x22, 0x33));
}
}