Rain Paharia

I think what I ended up having was I was storing a phantom data of D or something like that. So I was storing like... So I had this thing which only stored the T as a marker, so it didn't actually store any concrete values of T. And implementing something like clone for that should not require that T implement clone, right? Just logically, that is not a requirement.

So I ended up reaching for derive where with that. That's a pretty common thing I end up having to do.

So I ended up reaching for derive where with that. That's a pretty common thing I end up having to do.

Um, I think, uh, I think what I ended up doing, God, this is telepathic crate powers.

Um, I think, uh, I think what I ended up doing, God, this is telepathic crate powers.

I think, you know, I was thinking about how I'd do that, and I feel like there's no magic, right? In this case, I ended up Googling for, I think, Rust-derived custom trait bounds or something, and derived where is in the first page of results. But, you know...

I think, you know, I was thinking about how I'd do that, and I feel like there's no magic, right? In this case, I ended up Googling for, I think, Rust-derived custom trait bounds or something, and derived where is in the first page of results. But, you know...

I'll spend a little time looking on Google and Create.io, and I'll also maybe ask some people who are there, like, I know, do you know something? And then sometimes I can't find it. It's just, it's really hard. I think one of the ways, one of the more, I think, structured ways that has helped is like,

I'll spend a little time looking on Google and Create.io, and I'll also maybe ask some people who are there, like, I know, do you know something? And then sometimes I can't find it. It's just, it's really hard. I think one of the ways, one of the more, I think, structured ways that has helped is like,

Like if you have a particular code base you like, which you feel like might use something like that, then kind of dig around in that code base source code. I think that is kind of, you know, that, that feels like a good way. And I've discovered a whole bunch of crates that way.

Like if you have a particular code base you like, which you feel like might use something like that, then kind of dig around in that code base source code. I think that is kind of, you know, that, that feels like a good way. And I've discovered a whole bunch of crates that way.

I think a place where that's kind of organically arose is... is with CLI parsing crates, because there's a whole bunch of CLI parsing crates. So some things like clap, which many, if you've written a Rust CLI tool, you've almost certainly come across clap. But there's a whole bunch of other points in this design space that people have hit with various trade-offs.

I think a place where that's kind of organically arose is... is with CLI parsing crates, because there's a whole bunch of CLI parsing crates. So some things like clap, which many, if you've written a Rust CLI tool, you've almost certainly come across clap. But there's a whole bunch of other points in this design space that people have hit with various trade-offs.

And I was really appreciative of people really put together benchmarks for like, you're considering things like, how long a build takes and like how many bytes get added to the final binary, right? Versus like error handling and so on. And I think, you know, different projects can reasonably make different trade-offs here.

And I was really appreciative of people really put together benchmarks for like, you're considering things like, how long a build takes and like how many bytes get added to the final binary, right? Versus like error handling and so on. And I think, you know, different projects can reasonably make different trade-offs here.

And one of the things I, this table was like when I saw this table and when I saw like, you know, the amount of work put into it, it was just very, very impressive to me.

And one of the things I, this table was like when I saw this table and when I saw like, you know, the amount of work put into it, it was just very, very impressive to me.

Yeah, and in particular, like, I mean, clap has a couple different ways to use it. You can use it with or without the proc macro, but then there's a bunch of others. So actually another one that I really like that is much lower level than clap is lexopt. So the goal of lexopt is like all it gives you is an iterator over the options, right?

Yeah, and in particular, like, I mean, clap has a couple different ways to use it. You can use it with or without the proc macro, but then there's a bunch of others. So actually another one that I really like that is much lower level than clap is lexopt. So the goal of lexopt is like all it gives you is an iterator over the options, right?

So you're getting an iterator, and in the iterator, you get a little bit of structure. So you get whether it's a single dash or a double dash. So you get very, very basic things like that. And some, if you really want that low level of control, then lexopt is great.