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Null unions: equality, truth, text, arrays, and loose null == undefined - #424

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ASDAlexander77 merged 6 commits into

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fix-null-union-gaps

Oct 1, 2026

Merged

Null unions: equality, truth, text, arrays, and loose null == undefined#424
ASDAlexander77 merged 6 commits into
mainfrom
fix-null-union-gaps

Commits on Sep 30, 2026
- Loosely, an optional holding null equals undefined
  
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- The array is read out of a `number[] | null`
  
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- A value type or null is tested for truth, narrowed and read as text
  
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- A union equals a value when the member it holds does
  
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- A value narrowed to null is null, also under --di
  
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- `n!` reads the member of a `number | null`; plain assignment is still refused
  
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