iris-aiandClaude Opus 5
7548139861
Layout reaches one place by more than one route -- a box composed down the chain, and the same box summed from what its children asked for -- and the two land a few bits apart in floats. Where that decides something structural rather than something positional, a warm tree disagrees with a cold one: `5ed9e87` is the instance, and its margin is a patch over the representation rather than a fix to it. `Fixed<SHIFT>` is a count of `1 / 2^SHIFT`s in an `i32`. Adding and subtracting are exact, a multiply rounds once back onto the same steps, and two routes that come within half a step land on the same number -- so the comparisons downstream can ask for equality rather than for nearness. `Px = Fixed<6>` and `Rel = Fixed<24>`: a sixty-fourth of a pixel is finer than a display and still exact in `f32` up to 262,144 px, and twenty-four bits of fraction matches `f32` at a half, beats it above one where anchors sit, and leaves +/-128 of range to sum relative children in. Nothing uses it yet. The arithmetic saturates rather than wrapping, because a clamped coordinate keeps the ordering a wrapped one inverts, and the ends are what an unbounded interval will be written with. Checked: fmt, clippy, 99 tests including ten for this type -- the round trip through `f32`, halves rounding away from zero either side, saturation at both ends, and 20,000 additions landing exactly where the count says. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
39 lines
721 B
Rust
39 lines
721 B
Rust
#![feature(macro_metavar_expr_concat)]
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#![feature(const_ops)]
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#![feature(const_trait_impl)]
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#![feature(const_convert)]
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#![feature(unboxed_closures)]
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#![feature(fn_traits)]
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#![feature(const_destruct)]
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#![feature(associated_type_defaults)]
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#![feature(unsize)]
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#![feature(coerce_unsized)]
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#![feature(option_into_flat_iter)]
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#[cfg(feature = "layout-diagnostics")]
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pub mod layout_diagnostics;
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mod attr;
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mod event;
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mod fixed;
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mod num;
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mod orientation;
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mod primitive;
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mod render;
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mod ui;
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mod widget;
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pub mod util;
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pub use attr::*;
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pub use event::*;
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pub use fixed::*;
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pub use num::*;
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pub use orientation::*;
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pub use primitive::*;
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pub use render::*;
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pub use ui::*;
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pub use widget::*;
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pub type UiColor = primitive::Color<u8>;
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