Support List(T) passthrough #436
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…o-util-0.7.4 Update tokio-util requirement from 0.6.0 to 0.7.4
…s-by-value remove needless pass by value
…is_empty implement 'is_empty' where it's useful,
use 'Self' keyword to refer to own type
Clippy/useless format
use built-in 'Reverse' struct
remove unnecessary use of 'ref'
use 'Self' keyword to refer to own type
The MSRV (minimum supported Rust version) is the earliest version capable of building a project. In the case of the capnp crate, the MSRV is 1.65.0, due to the use of GATs. Having the MSRV in Cargo.toml helps display better error messages when the Rust version is too old to build a project. eg: > error: package `capnp v0.15.0 (/Users/maxime/Code/capnproto-rust/capnp)` > cannot be built because it requires rustc 1.65.0 or newer, while the > currently active rustc version is 1.64.0 Without it, the error messages are more confusing. > error[E0658]: generic associated types are unstable > --> capnp/src/traits.rs:73:5 > | > 73 | type Builder<'a>: FromStructBuilder<'a> + HasStructSize; > | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > | > = note: see issue #44265 <rust-lang/rust#44265> for more information Cargo.toml docs: https://doc.rust-lang.org/cargo/reference/manifest.html#the-rust-version-field
Specify the minimum supported Rust version for capnp crate
I testing this change on the following simple program:
```
pub mod primlist_capnp {
include!(concat!(env!("OUT_DIR"), "/primlist_capnp.rs"));
}
pub fn main() {
let mut scratch_space = vec![0u8; 16000];
let mut input: Vec<f64>= vec![0.0;1500];
let mut cc = 1.1;
for _ in 0 .. 500000 {
for inp in &mut input[..] {
*inp = cc;
cc += 0.02;
}
cc -= input.len() as f64 * 0.02;
cc += 0.001;
let allocator = capnp::message::ScratchSpaceHeapAllocator::new(&mut scratch_space);
let mut message = ::capnp::message::Builder::new(allocator);
let root : primlist_capnp::foo::Builder = message.init_root();
let mut list = root.init_float_list(input.len() as u32);
for (i,n) in input.iter().enumerate() {
list.set(i as u32,*n);
}
for (i,n) in input.iter().enumerate() {
assert_eq!(*n, list.get(i as u32));
}
}
}
```
Adding the #[inline] attribute cut the run time from ~2.5 seconds to about 1.0 seconds.
Makes text::Reader a wrapper around &[u8] and defers utf-8 validation until `to_str()` or `to_string()` is called. This means that users will only need to pay the utf8 validation cost if they actually need it. This also allows users to access (broken) non-utf8 Text data. Previously such data was inaccessible.
Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4. - [Release notes](https://github.com/actions/checkout/releases) - [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md) - [Commits](actions/checkout@v3...v4) --- updated-dependencies: - dependency-name: actions/checkout dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <[email protected]>
The idea here is to lower the likelihood of any performance degradation caused by the changes in the 0.18 release.
|
Thanks. This looks okay to me, but I'd like to wait until upstream actually adds this feature before we add support here.
Hm... yeah |
ErikMcClure
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This is an implementation of capnproto/capnproto#1807 for allowing
List(T)in schemas. Essentially, it is treated as an AnyList parameter on the wire, but the type information is preserved in the schema, which allows the C++ version to implement a proxy List(T) over the AnyList that enforces the correct type usage.I could not find an equivalent to capnp-c++'s
AnyListclass, it appears that AnyLists are simply converted toany_pointers and it is left to the user to cast them appropriately. So, this change simply replaces rejecting aList(AnyPointer)by replacing it with anany_pointer, the same wayAnyListis handled. This change doesn't break any existing tests, but also does not add any tests either, because any test for this feature would have to be gated behind whatever version of capnp ends up incorporating List(T) support.It may be possible to restrict the acceptance of
List(AnyPointer)to only cases where theany_pointeris an actual parameter (which is what was done in the C++ version) but I wasn't sure how to do that.