Kotlin M8

What's new:

• JVM
  • Reflection for properties introduced
  • Inline functions
    • Inlines into objects are supported
    • Default parameter values supported for inline functions
  • Generated code speedups
    • delegated properties work faster now
    • when's with constants are faster due to dedicated bytecode instructions used
  • breaking change Reporting platform signature clashes
    • [platformName] annotation to resolve signature conflicts
  • transient, synchronized and strictfp supported on the JVM
• JS
  • data classes supported
  • LinkedHashSet/LinkedHashMap supported
• Language
  • breaking change private in a package now means "in this package and subpackages in the same module"
  • breaking change extension properties can't have backing fields
  • breaking change Bare @ and @@ are no longer available
• Standard library
  • slice()
  • collection-like operations on strings
  • Map.contains
  • join() for rendering separated lists
  • String.substringBefore/After[Last]
  • String.replaceBefore/After[Last]
  • Appendable.appendln()
  • StringBuilder {}
  • Iterable.merge(other) { (v1,v2)→v }
  • set operations (union, intersect, subtract)
• IDE
  • IntelliJ IDEA 14 EAP supported
  • Debugger
    • Evaluate expression
    • Smart step into
  • Refactorings
    • Move toplevel declarations to separate file
    • Extract function (not finished, but some cases working)
    • Extract local function
  • Intentions
    • DeMorgan law
    • Flip binary expression (== etc)
    • Split if
    • Replace with operator sign
    • Replace with traditional assignment
    • Replace with infix call
    • Simplify boolean expressions
    • Add/Remove explicit type arguments
    • assert <-> if with throw
    • if <-> ?:
    • !! <-> if
    • make types explicit/implicit in lambda
    • forEach { } <-> for loop
    • string concatenation <-> interpolation
  • Smart completion
    • smarter on overloads
    • callable references (::functionName)
    • lambdas
    • !! and ?: for nullable members
    • anonymous classes (object expressions)
    • constants in when()
  • Formatter improved
  • Structure view shows members of supertypes
  • J2K converter improved
  • Speedups in highlighting and completion
• Support for new versions of Gradle/Android (0.10, 0.11, 0.12)