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BOOST_PROTO_EXTENDS_USING_ASSIGN — For exposing in classes that inherit from
proto::extends<>
the overloaded assignment operators defined therein.
// In header: <boost/proto/extends.hpp>
BOOST_PROTO_EXTENDS_USING_ASSIGN(Derived)
The standard usage of
proto::extends<>
is to inherit from it. However, the derived class automatically gets a compiler-generated assignment
operator that will hide the ones defined in
proto::extends<>.
Use BOOST_PROTO_EXTENDS_USING_ASSIGN() in the derived class to unhide the assignment
operators defined in
proto::extends<>.
See proto::extends<>
for an example that demonstrates usage of BOOST_PROTO_EXTENDS_USING_ASSIGN().