Hi ,

What is the solution for this question? Could someone update me?

Consider below C program:

int func() {

int x, y;

x = 10;

{

int x;

x = 20;

y = x;

}

return(x * y);

}

The identifier x is declared in the methods outer scope. Another declaration occurs within the nested scope that assigns y. In C, the nested declaration of x could be regarded as a declaration of some other name, provided that the inner scopes reference to is appropriately renamed x.

Design a set of AST visitor methods that,

Renames and moves nested variable declarations to the methods outermost scope

Appropriately renames symbol references to preserve the meaning of the program