C++ vs Rust

[Daniel Duffy]

Are you doing rust/python/C++ interop for your book? Make a third C++ course please

fn main() {
    println!("Hello, world!");
}

 

[MichaelLewis]

fn main() {
    println!("Hello, world!");
}

Funny syntax with the ! appended to the function.

 

[Daniel Duffy]

Funny syntax with the ! appended to the function.

Maybe it's for emphasis?

 

[Paul Lopez]

Maybe it's for emphasis?

I do prefer that! It indicates it is a macro. I'm sure you'll have lots of fun going into that world.

 

[MichaelLewis]

I do prefer that! It indicates it is a macro. I'm sure you'll have lots of fun going into that world.

Should the developer care about it being a macro or function? Seems like something just needless for me to remember.

 

[Daniel Duffy]

Question: has anyone written an in-depth, "scientific" comparison of Rust and C++ at a level higher than "factional cheerleading" (no offence intended ?

I found blogs like this.

Rust vs. C++: Differences and use cases | TechTarget

C++ and Rust share many characteristics as programming languages. Developers should compare Rust vs. C++ in terms of these safety and performance features.

www.techtarget.com

In particular, precise details (without the handwaving) on why, how and when to use or not use Rust, C++.

 

[Daniel Duffy]

Developers use Rust for general programming, web development, data science and video gaming, as well as for augmented reality (AR), virtual reality (VR) and blockchain projects.

OK, any other applications?

 

[Paul Lopez]

At work I'm seeing Rust most used to replace legacy C code, and create APIs. The risk and pricing quant analytics libraries in C++ though aren't being touched.

 

[MichaelLewis]

Question: has anyone written an in-depth, "scientific" comparison of Rust and C++ at a level higher than "factional cheerleading" (no offence intended ?

I found blogs like this.

Rust vs. C++: Differences and use cases | TechTarget

C++ and Rust share many characteristics as programming languages. Developers should compare Rust vs. C++ in terms of these safety and performance features.

www.techtarget.com

In particular, precise details (without the handwaving) on why, how and when to use or not use Rust, C++.

This is hard to come by it seems and is why I initially came to QN with the question. As far I’ve seen, it’s mostly Rust advocates advocating for something new without really saying when/why it’s better. And in that case, I’d just stick to C++.

 

[Daniel Duffy]

This is hard to come by it seems and is why I initially came to QN with the question. As far I’ve seen, it’s mostly Rust advocates advocating for something new without really saying when/why it’s better. And in that case, I’d just stick to C++.

I spent the last 3 days doing Rust programming for a bit of relaxation (am almost an expert by now , but being my age means I'm a fast learner). I plan to spend a few more days to suss out more features. It is just a C++20 lookalike; if you know C++20 (and you do) then it is a piece of cake.

From Wiki

Rust is a multi-paradigm, general-purpose programming language that emphasizes performance, type safety, and concurrency. It enforces memory safety—meaning that all references point to valid memory—without a garbage collector. To simultaneously enforce memory safety and prevent data races, its "borrow checker" tracks the object lifetime of all references in a program during compilation.

Rust was influenced by ideas from functional programming, including immutability, higher-order functions, and algebraic data types. It is popular for systems programming.[13][14][15]

This is true, more or less. But talk is cheap.

Rust is a multi-paradigm, general-purpose programming language
Not in my book. Inside Rust is a (not very useful) protean Actor model trying to get out. It is not OOP, GP, FP, really. More later.

Who would like me to write a small precise report on Rust?

Caveat: my opinion of 2024-5-6.
@MichaelLewis

 

[Paul Lopez]

Would be nice to see you implement something a bit more complicated in Rust and compare and contrast it to the C++ implementation. Can be finance related, or whatever other topic you like.

 

[Daniel Duffy]

Would be nice to see you implement something a bit more complicated in Rust and compare and contrast it to the C++ implementation. Can be finance related, or whatever other topic you like.

Good idea. This week I'm just kicking the tyres (like uchi komi) and then I can go to a small app, e.g. Black Scholes (call C++/C maths function from Rust). yes??
Rust does not have much OOP support ..

Our goal is eventually interop.

 

[Paul Lopez]

Good idea. This week I'm just kicking the tyres (like uchi komi) and then I can go to a small app, e.g. Black Scholes (call C++/C maths function from Rust). yes??
Rust does not have much OOP support ..

Our goal is eventually interop.

Would be downright excellent!

Also some of the more popular/common software design patterns used.

 

[Daniel Duffy]

Would be downright excellent!

Also some of the more popular/common software design patterns used.

In Volume II of book. This be Vol I.

 

[MichaelLewis]

Rust does not have much OOP support ..

Our goal is eventually interop.

That seems fairly limiting, don’t you think? OOP is really useful in a lot of cases. Makes it seem like it’d be difficult to build a trading system or pricing libraries, etc.

My day to day is probably 80% OOP and 20% functional.

 

[MichaelLewis]

Who would like me to write a small precise report on Rust?

I’d really like to see this!

 

[Daniel Duffy]

I’d really like to see this!

Coming up, Sir!

A serious point I would like to addess is:

"If Rust is the answer, then what is the question?"

aka the right tools for the right job!

 

[Daniel Duffy]

Random question: why is there a plethora of Actor "frameworks" in Rust?

https://www.reddit.com/r/rust/comments/n2cmvd/there_are_a_lot_of_actor_framework_projects_on

 

[MichaelLewis]

Random question: why is there a plethora of Actor "frameworks" in Rust?

https://www.reddit.com/r/rust/comments/n2cmvd/there_are_a_lot_of_actor_framework_projects_on

Perhaps it’s a language more suited for data processing relative to OOP?

 

[Daniel Duffy]

Perhaps it’s a language more suited for data processing relative to OOP?

It is probably a junior version of Erlang?