anki/rslib
Damien Elmes 6941bccde4 Add support for proto3 optional scalars
Protobuf 3.15 introduced support for marking scalar fields like
uint32 as optional, and all of our tooling appears to support it
now. This allows us to use simple optional/null checks in our Rust/
TypeScript code, without having to resort to an inner message.

I had to apply a minor patch to protobufjs to get this working with
the json-module output; this has also been submitted upstream:
https://github.com/protobufjs/protobuf.js/pull/1693

I've modified CardStatsResponse as an example of the new syntax.

One thing to note: while the Rust and TypeScript bindings use optional/
null fields, as that is the norm in those languages, Google's Python
bindings are not very Pythonic. Referencing an optional field that is
missing will yield the default value, and a separate HasField() call
is required, eg:

```
>>> from anki.stats_pb2 import CardStatsResponse as R
... msg = R.FromString(b"")
... print(msg.first_review)
... print(msg.HasField("first_review"))
0
False
```
2022-02-27 19:42:06 +10:00
..
.cargo initial Bazel conversion 2020-11-01 14:26:58 +10:00
benches New TTS/AV tag handling (#1559) 2021-12-17 19:04:42 +10:00
build Backend Custom Study (#1600) 2022-01-20 14:25:22 +10:00
cargo Update Rust deps; pin Tokio 2022-02-25 17:10:47 +10:00
i18n Update Rust deps; pin Tokio 2022-02-25 17:10:47 +10:00
i18n_helpers Update Rust deps; pin Tokio 2022-02-25 17:10:47 +10:00
linkchecker Update Rust deps; pin Tokio 2022-02-25 17:10:47 +10:00
src Add support for proto3 optional scalars 2022-02-27 19:42:06 +10:00
tests/support move linkchecker into separate crate 2021-12-20 17:27:43 +10:00
.gitignore initial Bazel conversion 2020-11-01 14:26:58 +10:00
bench.sh New TTS/AV tag handling (#1559) 2021-12-17 19:04:42 +10:00
BUILD.bazel V3 parent limits (#1638) 2022-02-10 09:55:43 +10:00
Cargo.toml Update Rust deps; pin Tokio 2022-02-25 17:10:47 +10:00
empty.rs Backend Custom Study (#1600) 2022-01-20 14:25:22 +10:00
README.md add some code editing/completion docs 2020-12-16 14:16:08 +10:00
rustfmt.bzl update to the latest rules_rust + security framework update 2021-03-27 19:28:19 +10:00
rustfmt.toml tidy up Rust imports 2021-04-18 18:38:54 +10:00

Anki's Rust code.

backend.proto stores the interfaces used to communicate backend messages between Rust, Python and TypeScript.