Re: [boost] Feature request: variant::view

Am 19.06.2016 um 15:31 schrieb TONGARI J:

Hi,

Sometimes we need to view a value as a variant and we don't want to copy the value into a variant.

It'd be great if there's a variant::view that works like a variant but holds a reference to the value instead.

The constructor should allow any reference to the types as in the variant, and a constructor that takes a reference to the variant, e.g.

template class variant::view { view(T1&); view(T2&); ... view(variant&); };

And we can use apply_visitor/get on a view as on a variant.

Thoughts?

Why not boost::variant ? I guess boost::variant would also work (boost::none, if it needs to be default-constructible) Or do you need to use the same visitors?

Thanks.

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