Subj : Fun with C++
To   : All
From : Nightfox
Date : Fri Nov 22 2013 07:34 pm

Nasty fun things to do in C++ (AKA Things not to do in C++, AKA How to shoot
yourself in the foot in C++):

Do you ever need to access private data members/functions in a class? Are you
frustrated that you aren't allowed to do that? No problem - Just put this at
the top of your source file:
#define private public
By re-defining private as public, you'll be able to access the private members
of an object!

Do you think references are safe? Think again! Consider this code:
////////////////////////////////
int *dynamicInt = new int(3);
int& intRef(*dynamicInt);
cout << "intRef (1): " << intRef << endl;
delete dynamicInt;
cout << "intRef (2): " << intRef << endl;
////////////////////////////////
After executing 'delete dynamicInt;', your program is likely to crash when you
try to use intRef again!

Do you think 'const' always guarantees constness? Think again! The const_cast
operator can be used to remove constness. Consider this function:
void someFunc(const string& aString)
{
   string& str(const_cast<string&>(aString));
   str = "Hello";
}
Now, the value of aString has been changed by the function!

These are just a few of the many fun things you can get away with in C++ and
potentially shoot yourself in the foot!

Nightfox

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