Highlight idea

[BuddhiLW]

I have read some topics on it, here,
(...)
#2
#137
et al

So, there is a OhMyREPL package, on Julia, which makes the repl indentable, matchable etc. Mainly, it makes it colorful.

Some things I may note here is (Photo:), f(x) = 4x + 5 x^2 it do not highlight the variable, as once was noted is also Emacs's standard. But, they uniformly highly constants, as 4, 5, 2 etc.

Operators, as +, ^ etc are colored.

The function, in the function, once it has been defined, it received highlighting, differently than native operators, but still noticeably a operator.

Could we/should it be made?
(I would like that)