class Foo
{
private:
Bar[] mArr;
}
Foo::Foo(int dim) : Bar[dim] { }
Set dimensions of stack-based array in constructor?
Author
Is it possible to do something like this:
Not directly, no... and let's just not discuss alloca(). You can do it with vector, of course.
Author
Yes, C++ (should have mentioned). Darn... seems like that's something that'd come up a lot. Oh well. Thanks.
No not possible. The size of the object would not be known at compile time. However, as Sneftel has pointed out you could (should) do it with std::vector which has a constructor that takes the initial size as an argument.
Doing it via templating would be another option.
Doing it via templating would be another option.
It's something that you see somewhat commonly in C. Do a search for "flexible array members" or "struct hack". However, it doesn't play nicely with C++ features such as constructors, and I doubt it will ever be a C++ feature.
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