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   libsigc++3 3.4.0 (typesafe callback system for standard C++)

   libsigc++3 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. It also contains adaptor
   classes for connection of dissimilar callbacks.

   Homepage: https://libsigcplusplus.github.io/libsigcplusplus


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