* WIP: Objective-C support
* Further work on implementation
* ObjC dynamic cast
* Add swift stub class attribute
* Classes, protocols and ivars
* Fix compilation issues
* Fix objc ir codegen
* Add objc linker option
* Add swift stub classref get ir gen
* Minor cleanup
* Fix objc link flag being added on non-darwin platforms
* Refactor objc gen
* remove use of std::nullopt
* Emit protocol tables
* Remove unused variable
* Formatting
* Fix build in release mode. Thanks for nothing, c++.
* Fix consistency
* Fix dynamic casts
* Fix tocall parentfd ref and arm msgsend call
* Make instance variables work
* Implicitly add isa pointer to objc classes.
* Fix protocol referencing & allow pragma mangle
* Fix protocol linkage
* Fix direct call support
* always generate var type for methods
* Fix test 16096a
* Fix extern ivar symbol gen, retain method decls
* Remove arm32 and x86 support
* Check method and ivar info before pushing to member list
* Make ObjcMethod info untyped.
* Make ivar and method gen more robust
* Generate optional protocol symbols
* Use bitcasting instead of creating multiple type defs
* Fix invalid protocol list struct gen
* More codegen robustness
* emit protocol table as const
* Make protocol table anon struct
* Fix callable type, generate protocol_list_t properly.
* Cast vthis to argtype
* Handle protorefs and classrefs properly
* seperate label ref and deref
* Fix method lookup
* Enable objective-c tests
* Enable objc_call_static test
* Scan both classes and protocols for method ref
* Enable objective-c tests on arm as well.
* supress objc linker warning in tests
* Fix class and protocol gen structure
* Fix objc_protocol_sections test
* ObjcMethod only get callee for functions with bodies
* Fix protocol class method gen
* Make ObjcMethod anon again
* Fix missing emit calls
* Fix classref gen
* Implement some of the requested changes
* Enable compilable tests
* Fix property selector gen, ugly hack for final funcs.
* Fix segfault in referencing fd->type
* Refactor implementation
* Fix null references in class and method lookup
* include unordered_map
* Get functionality on-par with prev impl.
* Fix super context calls
* Move -L-w flag to d_do_test and use IN_LLVM in objc.d/h
* add LDC version tag to -L-w flag
* Update CHANGELOG.md
