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Home/ Questions/Q 178983
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Asked: May 11, 20262026-05-11T14:19:36+00:00 2026-05-11T14:19:36+00:00

Is there anything wrong with pushing back a vector of vectors? like typedef vector<Point>

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Is there anything wrong with pushing back a vector of vectors? like

typedef vector<Point> Polygon; vector<Polygon> polys; polys.push_back(some_poly); 

All the elements in some_poly will be copied right?

I have a bug in my code and I can’t seem to figure out what’s wrong with it.

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  1. 2026-05-11T14:19:37+00:00Added an answer on May 11, 2026 at 2:19 pm

    Yes, that should work fine, as long as you have defined a copy constructor and assignment operator for your Point class (and ensured they’re doing the right thing etc). std::vector will push just fine, so the bug must be elsewhere – obviously we’d need more details to help further.

    There are performance implications if you’re going to push a vector of things, but don’t worry about that until it’s working (and then only if it becomes a problem).

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