prost | Protocol Buffers implementation for the Rust Language | Serialization library
kandi X-RAY | prost Summary
kandi X-RAY | prost Summary
prost is a Protocol Buffers implementation for the Rust Language. prost generates simple, idiomatic Rust code from proto2 and proto3 files. Compared to other Protocol Buffers implementations, prost.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of prost
prost Key Features
prost Examples and Code Snippets
Community Discussions
Trending Discussions on prost
QUESTION
Can somebody tell me what is happening with the types in tonic and prost? Only a month or two ago, my team had a working build that used a protobuf definition that contained a timestamp. We're compiling them with tonic_build using well known types. Something changed with the types moving from prost 0.7 to 0.10 and now I get this error.
...ANSWER
Answered 2022-Apr-15 at 09:45The conversion functionality has moved into prost-types
crate.
For reference, see https://docs.rs/prost-types/0.10.1/prost_types/struct.Timestamp.html#impl-From%3CSystemTime%3E and https://github.com/tokio-rs/prost/tree/master/prost-types
QUESTION
I came across an interesting problem. The input is a number from 1..n, where n <= 10^9. So you need to make a prime number out of it by changing its digits. Moreover, you need to change as few digits as possible, and if there are several such options, then you need to minimize the number. For, example 10, answer is 11.
This task passed all my tests and was accepted in the checking system. But my decision seems strange and quackish.
I considered a few cases on small numbers, and considering that prime numbers occur quite often, I decided to iterate over one digit of the number first and replace it with any from 0..9. But this solution fell on the 5th test. After that, I decided to add a search of the second digit and then the solution passed the tests.
It turns out that my solution works for the asymptotic len(n)^281sqrt(n). Which is good. But I absolutely cannot prove why 2 digits is enough. And suddenly there are some numbers where you need to replace 3 digits or more.
Please help me figure out why this is true, or help me come up with some kind of normal solution.
...ANSWER
Answered 2022-Mar-21 at 11:55I think this can be explained by a few observations/factors.
- Most centuries (
xxxx00 to xxxx99
) have at least one prime. - The first century without a prime is
1671800
. - The first millenium without a prime is
13893290219204000
(which is sufficiently greater than10^9
).
If you combine these factors, it's easy to see why most numbers can be made prime by changing two digits (since a large number of centuries have primes). And if the century doesn't have a prime, then changing three digits is guaranteed to give a solution, since each millenium in the given range has a prime number.
QUESTION
I'm using the prost
crate in a very "hello world" way, with a basic ProtoBuf file:
ANSWER
Answered 2022-Mar-16 at 01:11encode_to_vec
is not a free function. You need to call it as one of
f.encode_to_vec()
foo::Foo::encode_to_vec(&f)
Message::encode_to_vec(&f)
::encode_to_vec(&f)
The first method is the most normal, but the other ones may produce useful error messages when you get confused about what's going on.
[Edit:] Well, encode_to_vec
was added in prost 0.8.0, so with 0.7.0, it won't be usable.
QUESTION
Though this was working last week, suddenly now while building docker image for my rust application the following command fails-
...ANSWER
Answered 2022-Mar-03 at 04:46Editions are separately chosen by each crate being compiled. The current revision of the ed25519
crate requires a compiler that supports the 2021 edition. (You can find this out through docs.rs's handy source view: https://docs.rs/crate/ed25519/1.4.0/source/Cargo.toml.orig)
If you're trying to compile Rust binaries using a fixed compiler version (or an older version that might be in your distro package manager), then it's important to include a Cargo.lock
file in your project/container configuration. The lock file specifies exact versions of each crate, so that your build cannot be broken by new library versions requiring newer compiler features.
However, there's a catch: cargo install
ignores the lock file by default. So, you'll also need to change your command to pass the --locked
flag to cargo install
.
(You should also consider using a newer Rust compiler version, so that you don't have to use old versions of libraries that may have known bugs.)
QUESTION
It looks like the prost protobuf generator only adds derive(Debug)
to generated enum types (and only enums not inside a pub mod
block). None of the generated structs, or unions have it applied. How can I get prost to add it to everything?
Using Prost version 0.9 and rustic 1.56
...ANSWER
Answered 2021-Nov-06 at 15:19prost
doesn't have an option to turn that on so you have to do it yourself.
If you want to implement a trait for a type. You need to have either the trait or the type in your library/binary.
Since the trait is in std
and the type is in an external crate the best you can do is create a unit struct to wrap the type. Then implement Debug
for that.
QUESTION
I'm trying to move some data around b/w different threads but am getting the ole Copy trait-not-implemented error. Here's some code:
...ANSWER
Answered 2021-Oct-29 at 14:07It is really very difficult to help you with this information. The full error code would probably be useful.
Anyway, in "impl Node ... get_replyer()" you see that's callback should return somehink that's implement Copy
QUESTION
I'mm trying to write a generic function to encode and decode prost messages with the below code.
...ANSWER
Answered 2021-Jul-01 at 03:42The function encode
can't be used on trait objects since it uses generics.
You can make write_message
generic instead:
QUESTION
I have a class that I created to store the results of a race, such as name and time of each driver, and I have determined that I wish the results to be compared based on the time.
...ANSWER
Answered 2021-May-28 at 12:11It is not a good idea to compare hours with hours, minutes with minutes and second with seconds to find which HH:MM:SS combination is the fastest. There can be cases like 04:50:56 < 05:00:00, which does not evaluate well in your original compareTo()
method.
Try this code instead:
QUESTION
I am trying to create binary for a react electron application and I came across with this in package.json. What does **/*
mean ?
ANSWER
Answered 2021-May-16 at 11:25The **
means any directory - including sub directories.
The *
Means any file.
so src/**/*
means any file in any directory inside the src
directory.
QUESTION
Recently, I've been playing with Rust and gRPC using the Tonic libraries. I started looking at how to create a custom Codec and I'm scratching my head over this...
Starting with this chunk of code, I copied the MockEncoder
& MockDecoder
and added all the same imports used here in the test module:
https://github.com/hyperium/tonic/blob/master/tonic/src/codec/prost.rs#L133-L158
Then I got stuck on this error:
...ANSWER
Answered 2021-Mar-18 at 02:04The option is #[cfg(test)]
(singular), not #[cfg(tests)]
(plural). This is probably not failing because it's not being compiled or run at all, since the option is never set.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install prost
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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