Re: Difference between template and mixin template

[Just Dave via Digitalmars-d-learn]

On Thursday, 10 October 2019 at 15:56:36 UTC, Just Dave wrote:
I'm trying to get my head around mixing templates. I'm using it 
as kind of a replacement for class inheritance as it seems to 
fit better composition over inheritance. So I do something like:

    mixin template NumberTemplate()
    {
    private:
        int number = 0;
    public:
        int getNumber(int number)
        {
            return number;
        }
    }

    interface INumber
    {
        getNumber(int number);
    }

    class Number : INumber
    {
        template NumberTemplate;
    };

So two questions:

a) Is this correct usage?

b) It compiles if I just do:

    template NumberTemplate()
    {
    private:
        int number = 0;
    public:
        int getNumber(int number)
        {
            return number;
        }
    }

what is the difference between template and mixin template?

Sorry I messed up the above code example the following should 
look like:

    class Number : INumber
    {
        mixin NumberTemplate;
    };