Below are the changes for the current release.
See the CHANGES file for changes in older releases.
See the RELEASENOTES file for a summary of changes in each release.
Issue # numbers mentioned below can be found on Github. For more details, add
the issue number to the end of the URL: https://github.com/swig/swig/issues/

Version 4.0.2 (in progress)
===========================

2020-01-13: wsfulton
            [Python] #1595 Python -builtin constructors silently ignored keyword arguments.
            Instead of silenty ignoring them, now a "TypeError: f() takes no keyword arguments"
            exception is thrown if keyword arguments are used. Hence constructors and normal methods/
            functions behave in the same way. Note, -keyword should be used with -builtin to obtain
            keyword argument support.

2020-01-05: jschueller shadchin
            [Python] #1670 #1696 Add missing field initializers introduced in python 3.8:
            tp_vectorcall and tp_print.

2020-01-05: friedrichatgc
            [Octave] #1688 Change swig_this() to use size_t instead of long for compatibility
            with Windows 64 bit.

2020-01-05: treitmayr
            [Ruby] #1692 #1689 Add support for Ruby 2.7

2019-12-30: treitmayr
            [Ruby] #1653 #1668 Fix code generated when using -globalmodule option.

2019-12-29: ZackerySpytz
            [OCaml] #1686 Fix compilation errors with OCaml 4.09.0.

2019-12-10: wsfulton
            #1679 Fix parsing of C++11 identifiers with special meaning (final and override) when
            they are used as part of the scope name of an identifier, such as a namespace name.

2019-11-26: wsfulton
            [C#] #1628 'out' or 'ref' used in a cstype typemap was not always stripped out in parts
            of director code generation.

2019-11-01: wsfulton
            [Python] #1595 Fix bug in support for keyword arguments (kwargs feature or -keyword)
            when using -builtin. The fix is in the argument error checking when wrapping zero
            argument constructors only.