Obfuscation prevention
======================

See this meta-report from David A. Wheeler:
https://www.ida.org/research-and-publications/publications/all/i/in/initial-analysis-of-underhanded-source-code


Disallow shadowing of external/imported classes
-----------------------------------------------

Can this be done reliably? One might "forget" to add the dependency on
the module containing the class, which would then count as "no shadowing".

Shadowing system functions was apparently a common way to write underhanded
code.


Another approach could be to always require some kind of suffix, and
use special syntax that cannot appear elsewhere, e.g.:

    sys:File f = open "hello.txt"


Ensure that comment syntaxes from other languages give an error
---------------------------------------------------------------

For example (doens't mean all should be blocked):

    //
    /*
    ;
    (*
    {
    --
    """
    %
    '
    REM
    :


Ensure that a # in strange locations result in a warning
--------------------------------------------------------

For example:

    if s == "your number: "#123" !" and is_admin
    if b #= true

Maybe all # with any non-space character on either side should give a warning?

Similarly for "

    if s == "test and is_admin and other_s == "or true


Forbid big spacing (beyonds 80 columns)
---------------------------------------

For example:

    bool is_admin = false         <lots of spaces> or true