Can c++ cast vector to vector?

Asked Oct 19 '15 at 11:04

Active Oct 19 '15 at 11:04

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I want to create a generic function which gets vector types as argument. Derived1, Derived2, ... are derived (simply) from Base

I tried something like this: int function (vector& foo) It didn't work. Could you tell me, what is the best generic solution for this problem?

asked Oct 19 '15 at 11:04

err513

2

No. Looking for the duplicate. – Bartek Banachewicz Oct 19 '15 at 11:06
Also this: [Getting a vector into a function that expects a vector](http://stackoverflow.com/questions/114819/getting-a-vectorderived-into-a-function-that-expects-a-vectorbase/114883#114883) – Bartek Banachewicz Oct 19 '15 at 11:07
@BartekBanachewicz The first duplicate actually says "yes" :) Probably hitting some UB, but it can work – deviantfan Oct 19 '15 at 11:07
@deviantfan what? Where? Oh that's the dupe suggested by Singer I think. – Bartek Banachewicz Oct 19 '15 at 11:07
@BartekBanachewicz `To pass one in place of the other, you can pass a vector of pointers ` etc.etc. in the first answer – deviantfan Oct 19 '15 at 11:08
@deviantfan Wut. Weird. I'd ask Jerry if that's what he indeed meant. – Bartek Banachewicz Oct 19 '15 at 11:09
Thanks and sorry for the duplication. – err513 Oct 19 '15 at 11:10
@BartekBanachewicz While I agree that it is not ok and UB, in the end both contain only addressess, so with some matching casts (on elements and vectors (with detour through a vector pointer)) it probably will work. – deviantfan Oct 19 '15 at 11:10
@deviantfan I don't know about you, but I don't write code that has such assumptions in it. – Bartek Banachewicz Oct 19 '15 at 11:12
@BartekBanachewicz Me neither :) As said, I don't think it's ok, neither in practice nor in a +4 answer there – deviantfan Oct 19 '15 at 11:12
since boost came out, and later c++11, who the hell stores naked pointers in vectors anyway? People who do that should be shipped off to re-education centres. – Richard Hodges Oct 19 '15 at 11:19

Can c++ cast vector to vector?

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