Member (member types) and attribute.

成员(成员类型)和属性。

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The union member can be any type, including user-defined complex types.

联合成员可以是任何类型，包括用户定义的复杂类型。

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Copy constructible types must be able to be constructed from another member of the type.

可复制构造的类型必须能够从该类型的另一个对像进行构造。

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Copy constructible types must be able to be constructed from another member of the type.

可复制构造的类型必须能够从该类型的另一个对像进行构造。

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