What is the purpose of standard layouts for black box types?

Question

The C ++ standard indicates that a mutex, atoms, or conditinal_variable are of the standard layout type.

What is the advantage of this specification? How can a user use this property?

And in general, what could I get if I knew the type of a standard layout without knowing the details of its implementation?

Answer 1

You can make your code conversation with other programs written in different programming languages ​​than yours.

In the C ++ Concept links : StandardLayoutType :

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Answer 2

:

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, C ++, C , C, , ++. .