Using Varadic Templates for a Signals and Slots Implementation in C++ -- Paul Cook

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Using Varadic Templates for a Signals and Slots Implementation in C++

By Paul Cook

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Abstract

Connecting object instances to each other in a type-safe manner is a well-solved problem in C++ and many good implementations of signals and slots systems exist. However, prior to the new varadic templates introduced in C++0x, accomplishing this has traditionally been complex and required some awkward repetition of code and limitations.

Varadic templates allow for this system to be implemented in a far more elegant and concise manner and a signals/slots system is a good example of how the power of varadic templates can be used to simplify generic systems that were previously difficult to express. ...

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