Swap two header objects.

template<
    bool isRequest,
    class Fields>
void
swap(
    header< isRequest, Fields >& m1,
    header< isRequest, Fields >& m2);
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Swap two message objects.

template<
    bool isRequest,
    class Body,
    class Fields>
void
swap(
    message< isRequest, Body, Fields >& m1,
    message< isRequest, Body, Fields >& m2);
  » more...