This works on my end:

    @0xdebdf27f66c354b6;

    struct Foo(A) {
      field @0 :A;
    }

    struct B {}

    struct C {
      field @0 :List(Foo(B));
    }

Including the exact error message would make it easier to help.

-Ian

Quoting nikos efthias (2020-05-04 19:17:51)
>    I need a List(foo(b)) that is the problem capnp compile command
>    generates an error saying this is impossible
>
>    On Mon, May 4, 2020 at 7:12 pm, Ian Denhardt <i...@zenhack.net> wrote:
>
>    "Pointers" aren't an explicit thing in the schema language. Data, Text,
>    structs, lists and interfaces are implicitly pointers, while primitive
>    types like Bool and Float64 are not. Type parameters must always be
>    pointer types. So in this case you can just do: struct Foo(A) { field
>    @0 :A; } struct B{}; struct C { field :List(B); } -Ian Quoting nikos
>    efthias (2020-05-04 18:01:44)
>
>      I have a Struct containing generics which accepts another struct
>      such as ``` struct foo (a){ � � � field @0 :a } struct b{}
>      struct c{ field:List(a(b) } ``` the example above wont work because
>      I need to pass a b pointer to a but There is no documentation for
>      defining pointers I tried *b and &b which does not work. How do I
>      define the pointer? -- You received this message because you are
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