Convert remaining playground examples to contracts - #17
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Y-Nak
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Aug 20, 2026
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Similarly to #16, this PR updates all existing examples to use contracts and get rid of
wordtypes etchellomerged into the default example, renamed "Hello contract".std-usageis now a Calculator showing that a + b and Num.add(a, b) are the same trait call.traitis now a LightSwitch whose stored Switch enum is driven by the Toggle impl.genericsis replaced by a Registry: a where-constrained generic max working on a user-defined Version through its Eq/Ord impls.comptimeis now an Answer contract; comptime works, so no word needed.multi-fileretired: the option and mini NFT examples now demonstrate modules in realistic use.lambdaretired rather than converted. Flagging this one: closure application over runtime data currently fails Hull emission with SC0422: cannot lower closure dispatch in every shape tried, including higher-order functions taking lambda arguments. The previous example only compiled because all inputs were constants, so partial evaluation erased the closure before the backend ran; no e2e test exercises lambdas. The example should return once closure dispatch lowers to Hull.