I would like R to be more pythonic. One of the steps for transforming it would be the use of 'not' instead of '!'. I hope this does not need writing of C++ and compiling etc, or does it?
Functionality: "!TRUE" should equal "not TRUE".
If you know where to start, please point me there.
You better embrace the R way. Why all the effort for such a small thing? If you want Python, stick with Python. Besides, it is REALLY common to have ! act as "not" in other programming languages.
Anyway, this is something that allows the use of "not", but it will involve parentheses (the Arrr! way)
not <- function(x) { !x }
if (not(FALSE)) { print(1) }
[1] 1
In my opinion this is far worse than !.
And I can hear you thinking "but I would like to have if x is not in y:", but please, that would be the same as suggesting I'd want a way for Python not to need indenting.
The idea is that you learn a language, you do not change a language to suit an individual's needs. What will happen with others using your code?