when solving the test at http://cppquiz.org I found this interesting piece of code:
#include <iostream> int f(int& a, int& b) { a = 3; b = 4; return a + b; } int main () { int a = 1; int b = 2; int c = f(a, a);// note a,a std::cout << a << b << c; }
My question in this program is legal C ++ or is it not? I am worried about a strict pseudonym.
You specify a strict alias — but a strict alias is associated with different types of aliases . It does not apply here.
There is no rule prohibiting this code. Its moral equivalent is the following code:
int x = 42; int& y = x; int& z = x;
Or, more importantly, its equivalent to having multiple child nodes refer to the same parent node in the data structure of the tree.
Yes, it is legal.
I could officially prove this only by citing most of the standard C ++ text.
You pass two links, both of which refer to the same object, which is great. Then you assign new values to this single object. Also great.