What are the donwsides of writing an OS in C++?

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I know there are many proponents of both schools (plain C vs C++) and I do not want to replicate the usual flame war.

But I'd like to know: given a good C++11 compiler that can, for example, leverage hints like "final", what are the big penalties still affecting an OS written in C++?

I'm not interested, in this case, to considerations like "it's harder", as it's subjective. What I'm after, is the objective penalties introduced by C++ - assuming that the code is well written and leverages all the opportunities available to save size and reduce overhead.

asked 55 secs ago

Igor Stoppa

16

What are the donwsides of writing an OS in C++?