# `make_edges` function template

Note

To enable this feature, define the `TBB_PREVIEW_FLOW_GRAPH_FEATURES` macro to 1.

## Description

The `make_edges` function template creates edges between a single node and each node in a set of nodes.

There are two ways to connect nodes in a set and a single node using `make_edges`:

## API

### Header

    #include <oneapi/tbb/flow_graph.h>

### Syntax

    // node_set is an exposition-only name for the type returned from make_node_set function

    template <typename NodeType, typename Node, typename... Nodes>
    void make_edges(node_set<Node, Nodes...>& set, NodeType& node);

    template <typename NodeType, typename Node, typename... Nodes>
    void make_edges(NodeType& node, node_set<Node, Nodes...>& set);

### Example

The example implements the graph structure in the picture below.

    #define TBB_PREVIEW_FLOW_GRAPH_FEATURES 1
    #include <oneapi/tbb/flow_graph.h>

    int main() {
        using namespace oneapi::tbb::flow;

        graph g;
        broadcast_node<int> input(g);

        function_node doubler(g, unlimited, [](const int& i) { return 2 * i; });
        function_node squarer(g, unlimited, [](const int& i) { return i * i; });
        function_node cuber(g, unlimited, [](const int& i) { return i * i * i; });

        buffer_node<int> buffer(g);

        auto handlers = make_node_set(doubler, squarer, cuber);
        make_edges(input, handlers);
        make_edges(handlers, buffer);

        for (int i = 1; i <= 10; ++i) {
            input.try_put(i);
        }
        g.wait_for_all();
    }