[sigc] ANNOUNCE: libsigc++ 2.99.5

libsigc++ implements a typesafe callback system for standard C++. It
allows you to define signals and to connect those signals to any
callback function, either global or a member function, regardless of
whether it is static or virtual.

libsigc++ is used by glibmm and gtkmm to wrap Glib and GTK+ signals. It
does not depend on Glib, GTK+, glibmm or gtkmm.

Home page: http://libsigc.sourceforge.net/
Download:   https://download.gnome.org/sources/libsigc++/
Documentation: https://developer.gnome.org/libsigc++/unstable/

*** libsigc++-3.0

The libsigc++-3.0 API is currently unstable, meaning its API and ABI
may change in future releases. libsigc++-3.0 installs in parallel with
the stable libsigc++-2.0 API.

The libsigc++-3.0 API is not significantly different, but the
implementation is far simpler, using variadic templates instead
generating C++ code from .m4 files. libsigc++-3.0 requires a compiler
with C++14 support.

2.99.* versions are unstable versions of the libsigc++-3.0 API. 2.9.*, 2.10.*, 2.12.*, 2.13.*, 2.14.*, etc, 
are versions of the libsigc++-2.0 API.

*** Changes

2.99.5 (unstable):

* Functors (mem_functor, ptr_functor) no longer need to derive from a
  common functor_base base class, and functors no longer need to have
  a result_type typedef or alias.
  (Murray Cumming)
* emitters and accumulators no longer need to have a result_type 
  typedef or alias.
  (Murray Cumming)
* Remove now-unnecessary adaptor_type type aliases.
  (Murray Cumming)
* Remove some more unused and unnecessary public type aliases.
  (Murray Cumming)

Murray Cumming
murrayc murrayc com

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