New features:
- all : support @:resolve on abstracts (#3753)
- all : support extern abstracts and extern @:enum abstracts (#4862)
- all : support completion on { if the expected type is a structure (#3907)
- all : support (expr is Type) with mandatory parentheses (#2976)
- all : allowed passing package dot-paths on command line (#4227)
- all : support import.hx modules that define per-directory import/using directives (#1138)
- all : support parsing of postfix ! operator (can be used by abstract operator overloading and macros) (#4284)
- all : support parsing of ||= and &&= operators (can be used by abstract operator overloading and macros) (#4427)
- all : support @:structInit classes (#4526)
- all : reworked static analyzer and enabled it by default
- flash : update flash externs to version 21
- hl : added HL target (interpreter and C output)
- lua: added lua target
- js : introduced new jQuery extern (js.jquery.*) for jQuery 1.12.4 / 2.2.4 support. (#4377)
- js : introduced new SWFObject extern (js.swfobject.SWFObject) for SWFObject 2.3.20130521 (#4451)
- js : added js.Lib.rethrow (#4551)
- cs/java : added -D fast_cast as an experimental feature to cleanup casts
Bugfixes:
- all : properly disallowed assigning methods to structures with read-accessors (#3975)
- all : fixed a bug related to abstract + Int/Float and implicit casts (#4122)
- all : disallowed duplicate type parameter names (#4293)
- all : made UInt's >>> behave like >> (#2736)
- all : fixed various type loading issues
- all : fixed code generation problems with
inline(#1827) - php/as3 : support run-time metadata on interfaces (#2042)
- php : fixed argument passing to closures (#2587)
- neko/cpp : fixed various sys.Filesystem issues with Windows drive paths (#3266)
- as3 : fixed problem with covariant return types (#4222)
- as3 : fixed rare problem with static initialization order (#3563)
- python : fixed various reflection problems
General improvements and optimizations:
- all : added support for determining minimal types in Map literals (#4196)
- all : allowed @:native on abstracts to set the name of the implementation class (#4158)
- all : allowed creating closures on abstract inline methods (#4165)
- all : type parameter declarations can now have metadata (#3836)
- all : optimize Math.ceil/floor on constant arguments (#4223)
- all : allowed extern classes to have field names being used for both static and instance (#4376)
- all : added haxe.Constraints.Constructible (#4761)
- all : rewrote pattern matcher to improve output in many cases (#4940)
- python : use spaces instead of tabs to indent the output (#4299)
- cpp : reworked backend to improve overall code output quality and fix various issues
- swf : added scene-tag to allow creating accessible SWF files
Standard Library:
- all : added Lambda.flatten and Lambda.flatMap (#3553)
- all : added haxe.Constraints.Constructible (#4761)
- sys : proper quoting/escaping (can be opt-out) for Sys.command and sys.io.Process (#3603)
- js : added position parameter to haxe.macro.Compiler.includeFile
- js : removed -D embed-js (#4074)
- js : updated HTML externs
Macro features and changes: