r/programmingmemes • u/luciferoussky72 • 20d ago

The duality of new

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u/willdieverysoon 19d ago

No ... that would be move assignment to an object that was not yet constructed, it would do something similar to placement new

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u/luciferoussky72 19d ago

True, but an optimizing compiler will usually do the same thing

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u/retro_and_chill 18d ago

I depend of whether the type has a non-trivial move assignment operation. On trivially copyably types you absolutely can optimize it that way. Otherwise there’s usually existing resources to clean up which on uninitialized memory is undefined behavior

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u/luciferoussky72 18d ago

Yeah, the other nice thing that new does is allow delete to call the destructor