Comment by throwaway17_17

I’m pretty sure there is not any realistically feasible way to ever prove your statement. But I hope a majority of people can recognize the sheer magnitude of C++ as a language and take a position that it may not be possible to master the whole thing. Rust is ‘smaller’ language using some metrics (most metrics really) than C++ is another thing I would hope most people can accept. So, given that the comparisons between the two wholes being a semi-intractable discussion I would propose the following:

When considering some chosen subset of functionality for some specified use case, how do Rust and C++ compare in the ability to ‘master’. There are wide and varied groups (practically infinite) of features, constructs, techniques, and implementations that achieve targeted use cases in both languages, so when constructing a given subset which language grants the most expressivity and capability in the more ‘tight’ (i.e. masterable) package?

I think that’s a way more interesting discussion to have. Obviously, where the specified use case requires Rust’s definition of memory safety to be implemented 100% of the time (excluding a small-ish percentage of delimited ‘unsafe but identifiable’ sections) the Rust subset will be smaller due to the mandatory abstractions required to put C++ anywhere near complete coverage. So it may make sense to allow the subset to be defined as not only constructs in the base language, but include sealed abstractions (philosophically if not in reality) as potential components in the constructed subsets.

I may have to try and formulate some use cases to pose in a longer something to see if any truly experienced devs can lay out their preferred language’s best candidate subset in response. It would also be fascinating to see what abstractions and metaprogramming would be used to implement the subset candidates and figure out how that could factor into an overall measurement of the ‘masterable-ness’ of the given language (i.e. how impossible a task is it to be able to rely on a subject matter expert to implement any proposed subset for any given use case).