RandomStream class and interface -- what to call them?

[vasslitvinov]

We would like PCGRandomStream to be THE random number generator in the standard library. As such, what should it be called? See also #19602

Also, what will we call the random generator interface when interfaces reach production quality? Footnote: if I am writing a library that needs a random generator, however does not care which one to use, it would be generic over the type that implements the interface.

Python: the type name is Random, see https://docs.python.org/3/library/random.html

Rust: has some random number generators and also a trait/interface. All RNGs implement the RngCore trait, as a consequence of which the Rng extension trait is automatically implemented. Secure RNGs may additionally implement the CryptoRng trait. Some generators are OsRng, ThreadRng, StdRng, SmallRng.

Random or random for the class name is acceptable to several core devs.

[vasslitvinov]

When we set up an interface for random stream generators, we may want to allow for some flexibility by introducing:

• a "core functionality" interface, and
• a "bells and whistles" interface that requires additional features

[lydia-duncan]

Random is no longer intended for 2.0, removing the tag