Compiler Error C2620
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Compiler Error C2620

member 'identifier' of union 'union' has user-defined constructor or non-trivial default constructor

A union member cannot have a default constructor.

The following sample generates C2620:

// C2620.cpp
class A {
   A();   // A has a default constructor
};
union U {
   A a;   // C2620
};
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