Re: [capnproto] List of List using DynamicList
On Tue, Jan 24, 2023 at 6:11 PM Carlo Contavalli wrote: > Hello, > > On Tue, Jan 24, 2023 at 1:10 PM Kenton Varda > wrote: > >> You mean SchemaLoader::getType(), right? >> > > Correct. > > >> case schema::Type::LIST: >> return ListSchema::of(getType(proto.getList().getElementType(), scope)); >> >> So the returned type should not lose the fact that the type represents a >> list (or list-of-lists, or list-of-list-of-lists, etc.). >> >> Do you have some code that doesn't work as you expect, that you could >> share? >> > > When looking at the code above, the recursion seemed to pretty much return > a type representing List(struct) rather than > List(List(struct)), > I don't think that's true. If you give it a representation of List(List(struct)), it'll return ListSchema::of(ListSchema::of(struct type)), which seems correct? > I am not sure iterating over the DynamicList is doing the right thing. My > code is crashing, so assumed I was doing something wrong. > > Let me work on a self contained example, don't have one handy. > Yes, I think that would help. > Fundamentally... Once getType() returns, I have a capnp::Type that I can > use to build a DynamicList, which I can use to iterate over the elements. > Iterating over the elements is moving through the outer list, and returns > a DynamicValue. Now I need to iterate over the elements on the inner list. > > To go from DynamicValue to another DynamicList... use getType() passing in > getList().getElementType() (recursing inside once), and then > DynamicValue.of>? > You would use `dynamicValue.as()`, which returns a DynamicList::Reader for the inner list, which you can then iterate over. -Kenton > -- You received this message because you are subscribed to the Google Groups "Cap'n Proto" group. To unsubscribe from this group and stop receiving emails from it, send an email to capnproto+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/capnproto/CAJouXQ%3D_Uf-OX9jDziJDizML%3DQz8Mh0o%3DxbSq%3DOsKW9wZnJ8Rw%40mail.gmail.com.
Re: [capnproto] List of List using DynamicList
Hello, On Tue, Jan 24, 2023 at 1:10 PM Kenton Varda wrote: > You mean SchemaLoader::getType(), right? > Correct. > case schema::Type::LIST: > return ListSchema::of(getType(proto.getList().getElementType(), scope)); > > So the returned type should not lose the fact that the type represents a > list (or list-of-lists, or list-of-list-of-lists, etc.). > > Do you have some code that doesn't work as you expect, that you could > share? > When looking at the code above, the recursion seemed to pretty much return a type representing List(struct) rather than List(List(struct)), I am not sure iterating over the DynamicList is doing the right thing. My code is crashing, so assumed I was doing something wrong. Let me work on a self contained example, don't have one handy. Fundamentally... Once getType() returns, I have a capnp::Type that I can use to build a DynamicList, which I can use to iterate over the elements. Iterating over the elements is moving through the outer list, and returns a DynamicValue. Now I need to iterate over the elements on the inner list. To go from DynamicValue to another DynamicList... use getType() passing in getList().getElementType() (recursing inside once), and then DynamicValue.of>? Thanks, Carlo -- You received this message because you are subscribed to the Google Groups "Cap'n Proto" group. To unsubscribe from this group and stop receiving emails from it, send an email to capnproto+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/capnproto/CAN6NmwcG7_SsvxfFKEcJVzSBiyLUyFOrgKdFrd1W7AVH3Oiu-A%40mail.gmail.com.
Re: [capnproto] List of List using DynamicList
Hi Carlo, It seems like you've figured out what everything represents and than you need to use SchemaLoader here. I'm not sure I understand the problem you're getting at. On Sat, Jan 21, 2023 at 11:30 AM Carlo Contavalli wrote: > I see I can use SchemaLoader.get() to get a capnp::Type out of a > schema::Type::Reader, and from there I can get the ListSchema, and > DynamicList. But the .get() method recurses on the Type, so it'll return > the type of the inner struct, rather than outer List, and I suspect the > returned DynamicList will iterate on the inner struct, rather than the > outer list. > You mean SchemaLoader::getType(), right? Sure, the code "recurses" to convert the list's element type, but it then wraps that type in `ListSchema::of()`: case schema::Type::LIST: return ListSchema::of(getType(proto.getList().getElementType(), scope)); So the returned type should not lose the fact that the type represents a list (or list-of-lists, or list-of-list-of-lists, etc.). Do you have some code that doesn't work as you expect, that you could share? Sorry, I don't know of any example code off the top of my head, though perhaps there is something in schema-test.c++, schema-loader-test.c++, or dynamic-test.c++. -Kenton -- You received this message because you are subscribed to the Google Groups "Cap'n Proto" group. To unsubscribe from this group and stop receiving emails from it, send an email to capnproto+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/capnproto/CAJouXQkDWd2Vci%3Dn%3DOxiLuVQAr7yzuGk7mtj0d3RZHiNewg-sw%40mail.gmail.com.
[capnproto] List of List using DynamicList
Hello, How do you create and use a DynamicList() to parse a serialized List(List(struct)) object? I have a schema::Type::Reader object representing the type, but not sure how to instantiate the ListSchema correctly, and from there create the DynamicList. Is there an example of code I can look at? I could not find any unit test for DynamicList with List of List. I see I can use SchemaLoader.get() to get a capnp::Type out of a schema::Type::Reader, and from there I can get the ListSchema, and DynamicList. But the .get() method recurses on the Type, so it'll return the type of the inner struct, rather than outer List, and I suspect the returned DynamicList will iterate on the inner struct, rather than the outer list. (If you see a duplicate, apologies - it seemed like the message was first blocked as spam) Carlo -- You received this message because you are subscribed to the Google Groups "Cap'n Proto" group. To unsubscribe from this group and stop receiving emails from it, send an email to capnproto+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/capnproto/CAN6NmweA-yogePipve8auUVYp0xge%2BYYQN82O%3DWcYcJ2rbd%3Dxg%40mail.gmail.com.
