Big Kotlin Work List

[sschr15]

A bunch of things to get Kotlin to be (mostly) decompiling Kotlin and not a Kotlin-Java hybrid, split into a few main categories.

Technical Backend

• [ ] Publish Kotlin metadata to Kotlin-targeting code (partially in https://github.com/QuiltMC/quiltflower/commit/4891bff602a5908ba64b7c334445845f99c6d8e8)
• [ ] Kotlin exprent equivalents
• [ ] Other special Kotlin construct handling code

Non-method fixes

• [x] Field declarations (#275)
• [ ] data class support (flag indicated via https://github.com/QuiltMC/quiltflower/commit/8b8c86de1ce7128a4c8eb6673b77f6d94badbad5)
• [x] annotation class support (https://github.com/QuiltMC/quiltflower/commit/6ca6edb19fd25f9f040a6d00289cbb6eb0791776)
• [x] Primary constructors (#307)
• [x] Other constructors (#307)
• [x] extends / implements clauses (https://github.com/QuiltMC/quiltflower/commit/8b8c86de1ce7128a4c8eb6673b77f6d94badbad5)
• [ ] Anonymous classes
• [x] Annotation arrays should use [] (https://github.com/QuiltMC/quiltflower/commit/6ca6edb19fd25f9f040a6d00289cbb6eb0791776)
• [ ] Other explicit arrays should use arrayOf or the equivalent primitive type
• [ ] All known-to-have-generic types must specify generics
• [ ] Higher level functions not based on SAM interfaces
• [x] Top-level declarations (https://github.com/QuiltMC/quiltflower/commit/8e2283ee237fb35b1d2c35176aff1e6b7b6f5bd8)
• [ ] Type aliases
• [ ] Nullable types in generics (type creation via https://github.com/Vineflower/vineflower/pull/307/commits/0a4b15708427f89a800f50b14e733d9c1feedd6c)

Method fixes

• [ ] Remove unnecessary semicolons (which should be all of them if decompiling reasonably)
• [ ] Remove new from constructor calls
• [ ] Destructuring declarations
• [ ] String interpolation
• [ ] Smart Casts
• [ ] Receiver types (should decompile as this or as this@...)
• [ ] SAM lambda decompilation
• [ ] Non-SAM lambda decompilation
• [ ] for loops and if conditions on ranges (Experimental work done in https://github.com/Vineflower/vineflower/tree/feature/kotlin/loop-changes)
  • [ ] repeat
  • [ ] rangeTo
  • [ ] until and later Kotlin rangeUntil
  • [ ] downTo
  • [ ] step
• [ ] Infix functions
• [ ] Operator functions
• [ ] tailrec functions
• [ ] when statements
• [ ] Inline uninlining

[Kroppeb]

lateinit var

[LlamaLad7]

Inline function call decompilation would be cool. It should be possible from the source map.