Re: Mix struct types in the same array

[Laeeth Isharc via Digitalmars-d-learn]

On Wednesday, 18 December 2019 at 22:17:21 UTC, tirithen wrote:

On Wednesday, 18 December 2019 at 22:11:10 UTC, Sebastiaan Koppe wrote:

If you know all types up front you can use the Sumtype library on code.dlang.org

Thanks, it's a good starting point, the best would be if I only needed to define that the struct would implement void applyTo(ref User user) so that could be run in the loop to update the User entity.

But I'll try the Sumtype library, that takes me forward, thanks for the answer!

https://github.com/atilaneves/concepts

interface IFoo {
    int foo(int i, string s) @safe;
    double lefoo(string s) @safe;
}

@implements!(Foo, IFoo)
struct Foo {
    int foo(int i, string s) @safe { return 0; }
    double lefoo(string s) @safe { return 0; }
}

// doesn't compile
/*
@implements!(Oops, IFoo)
struct Oops {}
*/