2416. [fund.ts] std::experimental::any allocator support is unimplementable

Section: 6.3 [fund.ts::any.class] Status: Resolved Submitter: Jonathan Wakely Opened: 2014-06-16 Last modified: 2015-10-26 20:17:22 UTC

Priority: Not Prioritized

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Addresses: fund.ts

The allocator-extended copy constructor for any requires an arbitrary template parameter to be available in a type-erased context where the dynamic type of the contained object is known. This is not believed to be possible in C++.

If the allocator-extended copy constructor cannot be defined it questions the usefulness of the other allocator-extended constructors.

[Urbana, 2014-11]

Resolved by paper N4270.

Proposed resolution: