STL reimagined: What would you change, add or remove in a new STL implementation if API and ABI were not a concern?

Hello everyone,

I was just curious as to what would make a better STL if it was written today.

Things that come to mind immediately for me:

- Associative containers should not have const keys.
- Probably only emplace back, no push back.
- iterators escape and are unsafe.
- probably only a range abstraction that uses indexes like in Flux?
- allocators, according to Sean Parent, violate the whole/part principle, maybe memory allocationshould go out of containers?
- allocators should not be part of the type at all?
- only allocators for bytes?
- unordered containers should use linear probing.
- There should be some higher-level type-erased non-inteusive interfaces for containers?
- algorithms should admit only ranges.
-how about having Python-style container slicing in vector?
- library would not contain UB interfaces and fewer escape hatches and more difficult to misuse.


What do you think you would add/remove/modify?

https://redd.it/1p120w9
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