JoinNodeFunctionObject

[req.join_node_function_object]

A type Func satisfies JoinNodeFunctionObject if it meets the following requirements:

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JoinNodeFunctionObject Requirements: Pseudo-Signature, Semantics

Func::Func(const Func&)

Copy constructor.

Func::~Func()

Destructor.

Key Func::operator()(const Input &v)

Requirements: The Key and Input types must be the same as the K and the corresponding element of the OutputTuple template arguments of the join_node instance to which the Func object is passed during construction.

Returns key to be used for hashing input messages.