C++ named requirements: StandardLayoutType (since C++11)

Specifies that a type is a standard layout type. Standard layout types are useful for communicating with code written in other programming languages.

Note: the standard doesn't define a named requirement with this name. This is a type category defined by the core language. It is included here as a named requirement only for consistency.


The following types are collectively called standard-layout types:


See Standard-layout.

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 1672 C++11 first non-static data member rule ignored
existence of empty base classes
first non-static data member rule
made recursive
CWG 1813 C++11 class with a member defined in an indirect base
wasn't technically standard-layout
all member declarations must be
in the same class
CWG 2120 C++11 array as first member wasn't considered when
comparing the first element type with type of a base
array members are considered

See also

checks if a type is a standard-layout type
(class template)

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