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2493.initializer_list supports incomplete classes
Section: 17.11 [support.initlist] Status: New Submitter: David Krauss Opened: 2015-04-27 Last modified: 2015-05-05
Priority: 4
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Discussion:
The typical use-case of std::initializer_list<T> is for a pass-by-value parameter of T's constructor. However, this contravenes 16.4.5.8 [res.on.functions]/2.5 because initializer_list doesn't specifically allow incomplete types (as do for example std::unique_ptr (20.3.1 [unique.ptr]/5) and std::enable_shared_from_this (20.3.2.7 [util.smartptr.enab]/2)).
Proposed resolution:
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