Install libsigc++-2.0-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libsigc++-2.0-doc
Description:
type-safe Signal Framework for C++ - reference documentation
This library implements a full callback system for use in widget libraries, abstract interfaces, and general programming. It provides the ability to connect an abstract callback to a class method, function, or function object, and contains adaptor classes for the connection of dissimilar callbacks. . This package contains the reference documentation for libsigc++, needed only if you wish to write software which uses it.
Homepage: https://libsigcplusplus.github.io/libsigcplusplus/
Version: 2.10.0-2
Section: doc