irisandClaude Opus 5
f312db60c2
It shadowed the marker trait, so a `?Sized` bound in any crate that imports the prelude failed to resolve -- a compile error in someone else's code that nothing here would have caught. Three files inside iris already imported `std::marker::Sized` to get out from under it; they no longer need to. `SetSize` rather than `FixedSize` because the size it sets need not be fixed: `width(rest(2))` and `width(rel(0.5))` build the same widget. It pairs with the `MaxSize` beside it -- one sets a length, the other caps it. `tests/prelude_bounds.rs` is a compile-level guard: it fails to build if the prelude shadows `Sized` again. The pad tab of the tabs example, which is what uses `sized` and the flexible widths, renders pixel-identical. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
14 lines
454 B
Rust
14 lines
454 B
Rust
//! The prelude must not shadow names from the standard prelude. A widget
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//! called `Sized` meant every `?Sized` bound in a crate using iris resolved
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//! to the widget and failed to compile, which is an error in someone else's
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//! code that nothing here would have noticed.
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use iris::prelude::*;
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fn takes_unsized<T: ?Sized>(_: &T) {}
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#[test]
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fn the_prelude_leaves_sized_alone() {
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takes_unsized("a `?Sized` bound resolves to the marker trait");
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}
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