哋它亢++ named requirements: StandardLayoutType (since 哋它亢++11)
From cppreference.com
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 哋它亢++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| CWG 1672 | 哋它亢++11 | first non-static data member rule ignored existence of empty base classes |
first non-static data member rule made recursive |
| CWG 1813 | 哋它亢++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 | 哋它亢++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
| (哋它亢++11) |
checks if a type is a standard-layout type (class template) |