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Defer an empty side's inner extent in extend

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Dennis Kobert
2026-08-22 19:11:48 +00:00
parent a2918887f6
commit f2b0f7c533
1 changed files with 13 additions and 3 deletions
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16
node-graph/nodes/graphic/src/graphic.rs
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@@ -524,14 +524,24 @@ pub fn extend<T>(
}
/// The top level sums both sides; inner levels must agree (rectangular), a
/// free side defers to the other.
/// free side or a side with no top-level lanes defers to the other.
fn extend_extent(base: ExtentIn<'_>, new: ExtentIn<'_>, level: LevelIn) -> GPoll<Extent> {
match level.top() {
true => Extent::sum(base.at(level), new.at(level)),
false => base.at(level).zip(new.at(level)).and_then(|extents| match extents {
(Extent::Free, other) | (other, Extent::Free) => GPoll::Final(other),
(base, new) if base == new => GPoll::Final(base),
_ => GPoll::error("extend inner extents differ"),
(base_inner, new_inner) if base_inner == new_inner => GPoll::Final(base_inner),
(base_inner, new_inner) => {
let top = LevelIn {
level: level.depth - 1,
depth: level.depth,
};
match (base.at(top), new.at(top)) {
(GPoll::Final(Extent::Exactly(0)), _) => GPoll::Final(new_inner),
(_, GPoll::Final(Extent::Exactly(0))) => GPoll::Final(base_inner),
_ => GPoll::error("extend inner extents differ"),
}
}
}),
}
}