Bug https://bugzilla.gnome.org/show_bug.cgi?id=672555 suggests that libsigc++ lambda expressions shall be deprecated. They duplicate the functionality of C++11 lambda expressions. When libsigc++ lambda expressions are deprecated, sigc::group() will also be deprecated. (The frequently used sigc::mem_fun(), sigc::ptr_fun(), sigc::bind(), etc will not be affected.)

Do you use libsigc++ lambda expressions? Any objection to deprecating them? Other comments?

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