eventpp | Minimal C Event Bus | Pub Sub library
kandi X-RAY | eventpp Summary
kandi X-RAY | eventpp Summary
Minimal C++ Event Bus
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QUESTION
I am trying to implement a signal/slot system via templates to get into some advanced usage of templates. I looked up existing implementations and found one at https://github.com/skypjack/eventpp. I have been trying to understand how it works and pretty much figured it out but there are still some things I can't wrap my head around and couldn't find anything on the internet (didn't know what to search for).
Following is an executable minimal example of the code I took from the github repo plus additional code I implemented myself:
...ANSWER
Answered 2021-Mar-04 at 10:21Why is this template instantiated first? I would have expected it to be last (before Bus).
constructor call and instantiation are different thing
Bus
inherits from BusBase<2, KeyPressedEvent, KeyReleasedEvent>
which inherits from BusBase<2, KeyReleasedEvent>
which inherits from BusBase<2>
Call order is from (grand-)parents, members, constructor block, so the outputs you have.
Why are the parameters both in the template declarations and in the struct declarations?
That is the syntax for partial template specialization.
As a note partial specialization is unneeded here and can be rewritten as:
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