KITFORMA · EDITORIAL GUIDE
How do I preserve a literal tuple through a generic helper?
KitForma editorial guide. On TypeScript 5.0+, a const type parameter can improve literal inference: function define<const T extends readonly string[]>(x:T){return x;}.
Step-by-step guidance
On TypeScript 5.0+, a const type parameter can improve literal inference:
function define<const T extends readonly string[]>(x:T){return x;}. Use a readonly-compatible constraint. Verify an inline tuple retains its literal entries. Values already widened before the call cannot always regain their original literals through the helper.Sources and verification
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