C++ named requirements: TriviallyCopyable

Requirements

• Every copy constructor is trivial or deleted
• Every move constructor is trivial or deleted
• Every copy assignment operator is trivial or deleted
• Every move assignment operator is trivial or deleted
• at least one copy constructor, move constructor, copy assignment operator, or move assignment operator is non-deleted
• Trivial non-deleted destructor

This implies that the class has no virtual functions or virtual base classes.

Scalar types and arrays of TriviallyCopyable objects are TriviallyCopyable as well, as well as the const-qualified (but not volatile-qualified) versions of such types.

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
CWG 1734	C++11	C++03 POD with deleted non-trivial assignment was not trivial	deleted ctors/operators allowed

See also

is_trivially_copyable (C++11)

checks if a type is trivially copyable (class template)