cargo | The Rust package manager | DevOps library

Their relationship is like between cargo build and cargo rustc: cargo doc performs all the usual work, for an entire workspace, including dependencies (by default). cargo rustdoc allows you to pass flags directly to rustdoc, and only works for a single crate.

Here is the execution code for cargo rustdoc. Here is the code for cargo doc. The only differences is that cargo rustdoc always specify to not check dependencies while cargo doc allows you to choose (by default it does, but you can specify the flag --no-deps), and that cargo rustc allows you to pass flags directly to rustdoc with the flags after the --.

Update the Rust to satisfy the new edition 2021.

rustup default nightly && rustup update

Thanks to @ken. Yes, you can use the stable channel too!

But I love nightly personally.

You are using rocket 0.5.0-rc.1 and rocket_contrib 0.4.10. While Json from rocket_contrib does implement Responder, it implements the Responder trait of Rocket v4, not that of Rocket v5.

In Rocket v5, Json is not part of rocket_contib anymore, but included in the rocket crate (note that you need to enable the json feature on the rocket crate):

TL;DR: It's not Rust vs C++, it's LLVM (Clang) vs GCC.

Different optimizers optimize the code differently, and in this case GCC produces larger but faster code.

This can be verified using godbolt.

Here is Rust, compiled with both GCC (via rustgcc-master):

I can resolve with:

The issue you're going to have to confront is how to deal with function calls. I can't really give you any concrete advice based on your question, because the grammar you provide lacks any indication of the intended syntax of functions calls, but the hint that print(5) is a valid statement makes it clear that there are two distinct situations, which need to be handled separately.

Consider:

Old x86-64 CPUs don't support lzcnt, so rustc/llvm won't emit it by default. (They would execute it as bsr but the behavior is not identical.)

Use -C target-feature=+lzcnt to enable it. Try.

More generally, you may wish to use -C target-cpu=XXX to enable all the features of a specific CPU model. Use rustc --print target-cpus for a list.

In particular, -C target-cpu=native will generate code for the CPU that rustc itself is running on, e.g. if you will run the code on the same machine where you are compiling it.

You can add this action after your checkout step and GitHub can access your private repo dependancy.

Note:- Make sure to add a server's private key as a secret, public key to GitHub SSH keys and Please replace your private repo URL from https+auth_token to SSH. ssh://git@github.com/your_group/your_project.git

In JS, all numbers are floating-point thus division/modulo are performed on floating-point.

However, in current processors, integer division/modulo are much slower than floating-point ones (see here).

In your Rust program, the modulo is naturally computed on integers. When artificially switching to floating-point, I get a substancial improvement (310ms --> 152ms).