Make operator = returns a reference point to * this

"Effective C + +" Reading Notes 10: make operator = returns a reference point to * this

General chain assignment methods:

int x, y, z;

x = y = z = 15; / / is equivalent to x = (y = (z = 15));

When we are to achieve their own operator = operation, the need to return a reference, the reference point to the operator on the left of the parameter; 1 class Widget

2 (

3 public:

4

5 Widget & operator = (const Widget & rhs)

6 (

7

8 return * this; / / return * this

9)

10);

* This is why the c + + standard to achieve the standard practice of not doing so can also be compiled, but as is the norm, they observe about it.







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