76 lines
1.4 KiB
Rust
76 lines
1.4 KiB
Rust
pub mod region;
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use {
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smallvec::SmallVec,
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std::fmt::{Debug, Formatter},
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};
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pub trait Tag: Copy + Eq + Ord + Debug + Default + Sized {
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const IS_SIGNIFICANT: bool;
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fn constrain(self) -> Self;
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}
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#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Debug, Default)]
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pub struct NoTag;
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impl Tag for NoTag {
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const IS_SIGNIFICANT: bool = false;
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#[inline(always)]
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fn constrain(self) -> Self {
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Self
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}
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}
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impl Tag for u32 {
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const IS_SIGNIFICANT: bool = true;
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#[inline(always)]
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fn constrain(self) -> Self {
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self & 1
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}
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}
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#[derive(Copy, Clone, Eq, PartialEq, Default)]
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pub struct RectRaw<T = NoTag>
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where
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T: Tag,
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{
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pub x1: i32,
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pub y1: i32,
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pub x2: i32,
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pub y2: i32,
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pub tag: T,
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}
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impl<T> Debug for RectRaw<T>
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where
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T: Tag,
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{
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fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
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let mut debug = f.debug_struct("Rect");
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debug
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.field("x1", &self.x1)
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.field("y1", &self.y1)
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.field("x2", &self.x2)
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.field("y2", &self.y2)
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.field("width", &(self.x2 - self.x1))
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.field("height", &(self.y2 - self.y1));
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if T::IS_SIGNIFICANT {
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debug.field("tag", &self.tag);
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}
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debug.finish()
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}
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}
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impl<T> RectRaw<T>
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where
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T: Tag,
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{
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fn is_empty(&self) -> bool {
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self.x1 == self.x2 || self.y1 == self.y2
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}
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}
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type Container<T = NoTag> = SmallVec<[RectRaw<T>; 1]>;
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