C++ concepts: PODType

 

C++

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C++ concepts

Basic
DefaultConstructible CopyAssignable CopyConstructible	MoveAssignable (C++11) MoveConstructible (C++11) Destructible
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BasicLockable (C++11) Lockable (C++11) TimedLockable (C++11)	Mutex (C++11) TimedMutex (C++11)
Other
CharTraits pos_type off_type Clock (C++11)	UnaryTypeTrait (C++11) BinaryTypeTrait (C++11) TransformationTrait (C++11) TrivialClock (C++11)

 

Specifies that the type is POD (Plain Old Data) type. This means the type is compatible with the types used in the C programming language, can be manipulated using C library functions: it can be created with std::malloc, it can be copied with std::memmove, etc, and can be exchanged with C libraries directly, in its binary form.

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

Requirements (until C++11)

Either

• ScalarType

Or a class type (class or struct or union) that is

• an AggregateType
• has no non-static members that are non-POD
• has no members of reference type
• has no user-defined copy constructor
• has no user-defined destructor

Or an array of such type

Requirements (since C++11)

Either

• ScalarType

Or a class type (class or struct or union) that is

• TrivialType
• StandardLayoutType
• has no non-static members that are non-POD

Or an array of such type

See also

is_pod (C++11)	checks if a type is plain-old data (POD) type (class template)