Weird Expressions in Rust
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Weird Expressions in Rust
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Re: Weird Expressions in Rust
#2These “weird expressions” probably get used code golf.
Re: Weird Expressions in Rust
#3Great, now this stuff gets fed into LLM trainings and we'll see them in the next-gen model outputs.
Seriously though, I love "abusing" programming languages in unexpected ways. My favorite so far is: https://evuez.net/posts/cursed-elixir.html. Reading this made me realize Elixir is literally macros all the way down, and it's a Lisp!
Re: Weird Expressions in Rust
#4Note that for Rust devs these are also weird syntaxes. I feel like some people assume that an experienced dev can read these, but it takes a while to get what's going on.
Re: Weird Expressions in Rust
#5they exist because whole language built to treat expressions as firstclass citizens : blocks, ifs, matches, even macros as expressions that return values. so once you internalize that, all these weirdo one liners are artifacts. just artifact of a system where expressions compose infinitely. the syntax tree runs deeper than most people's habbits allow. you hit that depth and brain says this is wrong but compiler's allowing.
Re: Weird Expressions in Rust
#6This post is missing my favorite one!
fn evil_lincoln() { let _evil = println!("lincoln"); }
To understand what evil_lincoln is doing, you have to understand very old Rust. Here's the commit that introduced it: https://github.com/rust-lang/rust/commit/664b0ad3fcead4fe4d2...
fn evil_lincoln() {
let evil It doesn't say explicitly why this is "weird", but given some other comments in the file,
// FIXME: Doesn't compile
//let _x = log true == (ret 0);
Re: Weird Expressions in Rust
#7These “weird expressions” probably get used code golf.
Basically none of them are actually useful, or even do anything, it's mostly a parser stress test.
Re: Weird Expressions in Rust
#8this is why I like Go
Re: Weird Expressions in Rust
#9Note that for Rust devs these are also weird syntaxes. I feel like some people assume that an experienced dev can read these, but it takes a while to get what's going on.
Kind of like obfuscated C code I suspect.
Re: Weird Expressions in Rust
#10This post is missing my favorite one! fn evil_lincoln() { let _evil = println!("lincoln"); } What's weird about this? To understand what evil_lincoln is doing, you have to understand very old Rust. Here's the commit that introduced it: https://github.com/rust-lang/rust/commit/664b0ad3fcead4fe4d2... fn evil_lincoln() { let evil log was a keyword to print stuff to the screen. Hence the joke, https://en.wikipedia.org/wi…
What's the joke exactly? English is not my native language.