Kotlin Language Features in 2.0 and Beyond
summary
Kotlin 2.0 ships a rewritten front end (FIR) after ~5 years and ~80 subsystems changes, focused on performance and correctness; the compiler now dugars complex operator chains (fixing += on Long list with int literal), a new control‑flow engine yields many more smart casts including captured vars and merges across or expressions, and inline lambdas gain an implicit call‑in‑place contract. Compiler/IDE APIs are exposed for multiplatform plugins, future plans include guards (beta 2.1), context‑sensitive resolution, name‑based destructuring warnings, union‑style error handling and argument‑class patterns to preserve binary compatibility.
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chapters (10)
- 0:00Introduction
- 3:57Kotlin 2.0 compiler rewrite
- 8:14Kotlin 2.0 compiler changes
- 11:08Operator and property handling
- 16:21Smart cast enhancements
- 21:45Pattern matching future
- 26:47Data class improvements
- 31:00Library evolution with arguments
- 35:23Type system future
- 37:12Q&A
