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C++ devs need to understand the difference between:

   Vec1[0];
   Vec1.at(0);
Even the at method isn’t statically checked. If you want static checking, you probably need to use std::array.


Many also need to learn that there are configuration settings on their compilers that make those two cases the same, enabling bounds checking on operator[]().


Sure, but at() is guaranteed to throw an exception and operator[] can throw an exception when you go out of bounds. C++26 is tweaking this, but it's still going to differ implementation to implementation.

At least that's my understanding of the situation. Happy to be corrected though.




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