Question

I am curious? What high fundu logic goes behind not implementing:

result+=vector1;

where both result and vector1 are stl vectors.

Note: i know how to implement that bit, but i need to know what logic, the sages who designed STL were using when they chose not to implement this feature?

Answer 1

What are you expecting result to contain, the result of concatenating the original result with vector1 or an element-wise += (whatever that means for the underlying types), possibly default-initializing members if the sizes don’t match?

And yes, this is an answer 😉 .

Operator overloading should only be used where the meaning of the operation is unambiguous and practical for the underlying type and where it would offer a significant notational brevity over appropriately named function calls.

Note that valarray has more operator overloads than vector due to its interface and intended use.