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This conference talk from Lambda Days 2024 explores the process of embedding external domain-specific languages (DSLs) in Scala. Discover the motivations behind creating custom DSLs and learn practical implementation techniques using the tagless-final style. Follow along as Juan Manuel Serrano Hidalgo demonstrates how to implement syntax, semantics, and type systems for DSLs using Scala 3's advanced features including extension methods, match types, union types, polymorphic function types, structural types, and macros. Gain insights through real-world examples drawn from the Scala embedding of jq, the command-line JSON query language. Perfect for functional programmers looking to extend their language capabilities with domain-specific solutions.
