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Matt Godbolt sold me on Rust by showing me C++

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611 points LorenDB | 2 comments | 06 May 25 17:51 UTC | HN request time: 0s | source
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thrwyexecbrain ◴[06 May 25 20:15 UTC] No.43909187[source]▶
The C++ code I write these days is actually pretty similar to Rust: everything is explicit, lots of strong types, very simple and clear lifetimes (arenas, pools), non-owning handles instead of pointers. The only difference in practice is that the build systems are different and that the Rust compiler is more helpful (both in catching bugs and reporting errors). Neither a huge deal if you have a proper build and testing setup and when everybody on your team is pretty experienced.

By the way, using "atoi" in a code snippet in 2025 and complaining that it is "not ideal" is, well, not ideal.

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mountainriver ◴[06 May 25 23:30 UTC] No.43910728[source]▶
I still find it basically impossible to get started with a C++ project.

I tried again recently for a proxy I was writing thinking surely things have evolved at this point. Every single package manager couldn’t handle my very basic and very popular dependencies. I mean I tried every single one. This is completely insane to me.

Not to mention just figuring out how to build it after that which was a massive headache and an ongoing one.

Compared to Rust it’s just night and day.

Outside of embedded programming or some special use cases I have literally no idea why anyone would ever write C++. I’m convinced it’s a bunch of masochists

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almostgotcaught ◴[07 May 25 02:25 UTC] No.43911653[source]▶
> Every single package manager couldn’t handle my very basic and very popular dependencies

Well there's your problem - no serious project uses one.

> I’m convinced it’s a bunch of masochists

People use cpp because it's a mature language with mature tooling and an enormous number of mature libraries. Same exact reason anyone uses any language for serious work.

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cratermoon ◴[07 May 25 02:59 UTC] No.43911832[source]▶
How can you simultaneously call cpp a mature language with mature tooling and acknowledge that there's no working package manager used by any "serious" project?
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const_cast ◴[07 May 25 04:07 UTC] No.43912175[source]▶
Package managers per language are a (relatively) new endeavor. The oldest language I can think of that widely adopted it was Perl. Although, perl was quite ahead of it's time in a lot of ways, and php undid some the work of perl and went back to popularizing include type dependencies instead of formal modules with a package manager.

C++ "gets away" with it because of templates. Many (most?) libraries are mostly templates, or at the very least contain templates. So you're forced into include-style dependencies and it's pretty painless. For a good library, it's often downloading a single file and just #include-ing it.

C++ is getting modules now, and maybe that will spur a new interest in package managers. Or maybe not, it might be too late.

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1. zelphirkalt ◴[08 May 25 08:15 UTC] No.43924183[source]▶
C++ is _getting_ modules now? You must be kidding. How can this language, that adds more and more and more features every couple of years _still_ not have one of the most fundamental way to modularize code, splitting it into semantic units? Like ... what?! I did not think C++ would be that bad when it comes to foundational aspects of a programming language. This must be the result of silly obsession with OOP. The typical misuse of "we have classes, we don't need modules!". What other explanation could there possibly be for lacking such basic means of code organization.
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2. steveklabnik ◴[08 May 25 16:42 UTC] No.43928030[source]▶
Modules were added in C++20, but it's taken them this long to be implemented. Right now, only MSVC has full support according to https://en.cppreference.com/w/cpp/20