`schema.getProto().getNestedNodes()` returns a list of `capnp::schema::Node::NestedNode`, which has `name` and `id` fields. So that gives you the names of the nested declarations, which you can get plug into `getNested()`.
It's a little ugly, but in general, the C++ schema classes only have methods for things that aren't already easy to get from the underlying capnp struct. That said, I could be convinced that a `getAllNested()` that returns some sort of iterable would be worthwhile here. -Kenton On Thu, Jun 18, 2020 at 8:25 PM John Demme <[email protected]> wrote: > Hi Kenton- > > I only see: > >> ParsedSchema getNested(kj::StringPtr name) const; >> // Gets the nested node with the given name, or throws an exception if >> there is no such nested >> // declaration. >> > > If there were a getNested() which returned a list of ParsedSchemas that'd > probably be sufficient. Knowing what file housed a particular node would be > nice, but not strictly necessary. > > I'm writing software which takes in a capnp schema along with a bunch of > other stuff. It's basically a message passing compiler which can #include > capnp schemas to use for message schemas. Only there's no language > associated with it, so a source-to-source translator (codegen) doesn't > apply. > > ~John > > On Thu, Jun 18, 2020 at 4:59 PM Kenton Varda <[email protected]> > wrote: > >> Hi John, >> >> `capnp::SchemaParser` will parse capnp files and give you a >> `capnp::ParsedSchema`, which is like `capnp::Schema` but also has the >> `getNested()` method which allows you to traverse the whole tree of child >> nodes. So it's not just the root node. >> >> That said, it's true that it's not super-convenient to construct a >> `CodeGeneratorRequest` from this. You would need to traverse the tree and >> flatten it into a list, which is easy enough, but filling in >> `requestedFiles` (especially `imports`) might be tricky. >> >> Out of curiosity, why do you need to construct a `CodeGeneratorRequest`? >> >> -Kenton >> >> On Thu, Jun 18, 2020 at 6:15 PM John Demme <[email protected]> wrote: >> >>> Hello all- >>> >>> I've spent a lot of time digging around the CapnProto C++ code base, but >>> I can't figure how to point a function to a textual capnp schema and get >>> out the CodeGenRequest. Parsing to a capnp::Schema is not sufficient as >>> that class only represents the root node with (AFAICT) no way to access the >>> other nodes and other information in the CodeGenRequest. I saw there was >>> infrastructure to do this in the compiler, but those header files aren't >>> distributed with the library code. >>> >>> ~John >>> >>> -- >>> 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 [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/capnproto/d23c4480-ab9a-4b77-9a5d-02535698bc01o%40googlegroups.com >>> <https://groups.google.com/d/msgid/capnproto/d23c4480-ab9a-4b77-9a5d-02535698bc01o%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/capnproto/CAJouXQm5N5JwpyLN8MkUCcWRo4yfzouYdfhwEJN4mToER8D%3DwA%40mail.gmail.com.
