Library code means every project has to choose which library they use. Smolstring or SmartString? Tokio or one of the others?
And then suddenly we have “colored” libraries. Does my http library work with the async runtime I’m using? How many arena allocator implementations does my package depend on and compile in?
The advantage of something being in core or std is that, because all libraries implicitly depend on it, there’s no choice to be made. String is available everywhere. Libraries pass Strings to each other all the time. Nobody is confused when String is in the public API.
> stuff can be migrated in there from the ecosystem whenever a truly best-in-class solution that won't be replaced anytime soon becomes apparent.
Rust has been remarkably conservative when it comes to adding stuff to std in the last few years. I think it would make sense at the very least to add an async executor and async syscalls to std. You shouldn’t need 3rd party libraries to async read from a file or network stream. Obviously it would be a hugely divisive choice but making no choice at all hurts users.
And then suddenly we have “colored” libraries. Does my http library work with the async runtime I’m using? How many arena allocator implementations does my package depend on and compile in?
The advantage of something being in core or std is that, because all libraries implicitly depend on it, there’s no choice to be made. String is available everywhere. Libraries pass Strings to each other all the time. Nobody is confused when String is in the public API.
> stuff can be migrated in there from the ecosystem whenever a truly best-in-class solution that won't be replaced anytime soon becomes apparent.
Rust has been remarkably conservative when it comes to adding stuff to std in the last few years. I think it would make sense at the very least to add an async executor and async syscalls to std. You shouldn’t need 3rd party libraries to async read from a file or network stream. Obviously it would be a hugely divisive choice but making no choice at all hurts users.