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count_of<TypePack<int>> returns 0 #27

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count_of<TypePack<int>> returns 0#27
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enhancementNew feature or requestgood first issueGood for newcomers

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@MaxMatti
MaxMatti
opened on Apr 3, 2020

I was using meta17::count_of<TypePack<int>> which returns 0 because the type TypePack<int> is not in the empty typepack.
However I was expecting to get the amount of types present in TypePack<int> which is 1.

Not getting a compiler error led me to believe that this is the correct function for that.
Maybe we should introduce a compiler error for such cases?

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  1. MaxMatti
    changed the title [-]`meta17::count_of<TypePack<int>>` returns 0[/-] [+]count_of<TypePack<int>> returns 0[/+] on Apr 3, 2020
  2. arBmind
    added
    enhancementNew feature or request
    good first issueGood for newcomers
    on Apr 4, 2020
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