How to ensure function does not modify shared pointer

Question

How to avoid function modifying shared or unique pointer modified by using ptr.reset

Answer 1

Idk like be sure or somethn

Answer 2

check if pointer is null?

Answer 3

My bad. It works well and can discard this question.

https://sololearn.com/compiler-playground/cepsd2zZkYG5/?ref=app

I wanted to restrict last line of function and can do so by keeping const shared pointer ref as function argument.

Answer 4

wouldn't it make sense to first do a null check?

https://sololearn.com/compiler-playground/caC7H08qS4fy/?ref=app

Answer 5

My question might not be drafted correctly or precisely.

It's not I want to reset. I want that function should not change ptr. It can change if we use reset.

Reset will throw error when function takes const ref . This is what I wanted.