iris-aiandClaude Opus 5 2807a925af Make a declared length one that cannot carry a share ...

`declared_lens` filtered `leftover` out of both its sources and every
consumer then re-dropped it, so the rule lived in two filters and a comment.
A declaration is a `Len`: `LayoutLen::declared` states the rule once and both
sources go through it, and `Declared` replaces the bare two-element array on
`ActiveData` and in four signatures.

The two sources stay one value deliberately. A rule decides the child's box;
a hint only promises what it will report -- but `size_hint` is by contract an
exact answer with no painter context, and `hints_agree` fails a widget that
draws something else, so narrowing the box to a hint cannot change what is
drawn. Every consumer asks about the length, never which said it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

2026-09-19 21:06:31 -04:00

..

src

Make a declared length one that cannot carry a share

2026-09-19 21:06:31 -04:00

Cargo.toml

Retain opt-in layout performance diagnostics

2026-09-14 16:42:03 -04:00