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.
Requirements
The following types are collectively called standard-layout types:
- scalar types
- standard-layout class types
- arrays of such types
- cv-qualified versions of these types
Properties
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 |