When we need to remove constness of a variable , usage example?

Question

Hello I'm new to c++ I've read that if I've a const variable I can remove its constness and update the variable as I please but in general it defeata the purpose of const . Can someone explain why one would ever make something const to remove its constness later?

You should remove the `const`-ness when you KNOW the variable will NOT be modified. Usually for C APIs that don't have a notion of `const`-ness, even though they don't modify the object (which is often an array of `char`, but could be a `struct`). — Eljay, Mar 23 '21 at 19:01
when you hold a constant reference, it means that you cannot modify the object through that reference, it does not imply that the object is const — 463035818_is_not_an_ai, Mar 23 '21 at 19:03

score 1 · Accepted Answer · edited Mar 23 '21 at 18:59

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Mostly you should not do it, but some time you are stuck with a third party library which expects a char* ,but in your implementation you have the field marked as const , then you need to temporarily cast away the constness then make the function call.

edited Mar 23 '21 at 18:59

Dharman

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answered Mar 23 '21 at 18:53

saumitra mallick

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When we need to remove constness of a variable , usage example?

1 Answers1