hearth-collection-map

Integrating external collection types like Cats NonEmptyList into Scala macro derivation requires creating IsCollection and IsMap providers to let the derivation system recognize them as collections or maps.

The helper method pattern for avoiding path-dependent types in Scala macro quotes involves wrapping type references to ensure the macro-based derivation system can safely resolve external collection types during compilation.

Setting up IsCollection and IsMap providers for types that don't extend Iterable involves registering custom Provider implementations and wiring build and runtime helpers to integrate them into the derivation pipeline.

Yes, you can use fromUntyped wrappers for cross-compilation between Scala 2 and Scala 3 to ensure consistent type matching for external collection types across both compiler versions.

The difference between maps and collections ordering in macro derivation dictates whether the provider implementation treats the external type as an indexed sequence or a key-value structure during encoding and decoding.

Runtime helpers for Newtypes are needed when integrating external collections to bridge the gap between compile-time macro extraction and actual value manipulation during the derivation process.