Bit of a side-note, but I would disagree about ROOT/CINT ever being a C++ compiler. It was an interpreter for a language that looked somewhat related to C++, if you squint quite a bit.
* All variables were hoisted up to function scope. This meant that you couldn't use "int i" in one loop, and "unsigned int i" in the next. This also caused destructors to be incorrectly delayed until the end of the function call.
* Use of templates required pre-compiled dictionaries for each type the template might be instantiated for. Any templates occurring in interpreted code would be silently ignored.
* Incomplete standard library implementation. std::abs(long) is missing, for example.
* const is silently ignored.
Not entirely relevant to the current discussion, but good heavens, I am glad that monstrosity is gone.
* All variables were hoisted up to function scope. This meant that you couldn't use "int i" in one loop, and "unsigned int i" in the next. This also caused destructors to be incorrectly delayed until the end of the function call.
* Use of templates required pre-compiled dictionaries for each type the template might be instantiated for. Any templates occurring in interpreted code would be silently ignored.
* Incomplete standard library implementation. std::abs(long) is missing, for example.
* const is silently ignored.
Not entirely relevant to the current discussion, but good heavens, I am glad that monstrosity is gone.