35 lines
1.0 KiB
Markdown
35 lines
1.0 KiB
Markdown
# Beta 4 Language Usability
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Release label: `1.0.0-beta.4`
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Release date: 2026-05-22
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Status: released beta language-usability diagnostics slice.
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## Scope
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This post-`1.0.0-beta.3` slice reduces friction in ordinary project use
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without changing the typed core or claiming new syntax stability.
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## Current Work
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- Improve project/workspace build and run entry diagnostics.
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- Keep the accepted entry contract unchanged: `(fn main () -> i32 ...)`.
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- Use precise diagnostic codes for missing and invalid entry `main` functions.
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- Make non-exhaustive `match` diagnostics clearer and deterministic.
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## Acceptance Gates
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- `cargo test --test project_mode entry_main`
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- `cargo test --test diagnostics_contract`
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- `cargo fmt --check`
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- `git diff --check`
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## Deferrals
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- No implicit `main` return conversions.
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- No argument-taking `main`.
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- No async, package registry, or stable ABI/layout promises.
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- Broader type aliases, match diagnostics, and destructuring remain candidate
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follow-up items in the same language usability roadmap lane.
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