Hi Nikos,
The problem is this line:
contents @0:List(KV(UInt8,CardState));
UInt8 is not a pointer type, so you can't use it as a type parameter. You
will need to box it, like:
struct UInt8Box {
value @0 :UInt8;
}
Then you can do:
contents @0:List(KV(UInt8Box,CardState));
-Kenton
On Mon, May 4, 2020 at 6:36 PM nikos efthias <[email protected]>
wrote:
> Hi,
>
> @0x8bc5b84ae7dd5db8;
>
> struct Game{
> id @0 :UInt32;
> c1 @1 :List(UInt32);
> c2 @2 :List(UInt32);
> t @3 :List(UInt32);
> balls @4:List(UInt8);
> cardState @5:CardStateMap;
> cardIndexByNumber @6:Data;
> }
> struct CardStateMap {
> contents @0:List(KV(UInt8,CardState));
> struct CardState{
> r1 @0:UInt8;
> r2 @1:UInt8;
> r3 @2:UInt8;
> }
> }
>
> struct KV(K,V){
> k @0:K;
> v @1:V;
> }
>
>
> the code above is the exact code from my file and when I try to compile I
> get the following error
>
> On Mon, May 4, 2020 at 6:28 pm, Kenton Varda <[email protected]>
> wrote:
>
> Hi Nikos,
>
> If you'd like us to help you, you need to provide the exact code you
> actually wrote, and the exact error it produced.
>
> The code you provided in your first e-mail has numerous syntax errors such
> that it can't compile as-is. When I fixed those errors, it worked fine.
> That is, if I put the following in a file and compile it, I get no errors:
>
> @0xc39ccf0ba082696f;
>
> struct Foo(A) {
> field @0 :A;
> }
>
> struct B {}
>
> struct C {
> field @0 :List(Foo(B));
> }
>
>
> So, I do not know what problem you are actually having.
>
> -Kenton
>
> On Mon, May 4, 2020 at 6:21 PM nikos efthias <[email protected]>
> wrote:
>
>>
>> I need a List(foo(b)) that is the problem capnp compile command generates
>> an error sayingI need to pass pointers rather than b itself
>> so I cant compile my schema because it need a pointer type at compile
>> time and you are saying there is no such thing in capnproto which makes
>> using generics impossible in nested levels as i understand
>>
>> On Tuesday, May 5, 2020 at 3:12:40 AM UTC+4, Ian Denhardt 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?
>>> >
>>> > --
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>>> > [2]
>>> https://groups.google.com/d/msgid/capnproto/bd400995-9d98-4caf-8e10-
>>> > 81a3fe1de564%40googlegroups.com.
>>> >
>>> > Verweise
>>> >
>>> > 1. mailto:[email protected]
>>> > 2.
>>> https://groups.google.com/d/msgid/capnproto/bd400995-9d98-4caf-8e10-81a3fe1de564%40googlegroups.com?utm_medium=email&utm_source=footer
>>>
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>>
>
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