This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 117b. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2025-08-11
1363. Triviality vs multiple default constructorsSection: Clause 11 [class] Status: CD3 Submitter: Sean Hunt Date: 2011-08-16[Moved to DR at the October, 2012 meeting.]
The requirements for a trivial class include having “a trivial default constructor” (Clause 11 [class] paragraph 6). However, with an explicitly-defaulted default constructor and other constructors with default arguments, it is possible to have multiple default constructors. Such a class cannot be default-initialized and thus should probably be considered non-trivial.
Proposed resolution (February, 2012):
Change Clause 11 [class] paragraph 6 as follows:
...A trivial class is a class that has a trivial default constructor (11.4.5 [class.ctor]) , has no non-trivial default constructors, and is trivially copyable...
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