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BOOST_PROTO_MAX_FUNCTION_CALL_ARITY — Controls the maximum number of arguments that operator() overloads accept.
// In header: <boost/proto/proto_fwd.hpp>
BOOST_PROTO_MAX_FUNCTION_CALL_ARITYWhen setting BOOST_PROTO_MAX_ARITY higher than the default, compile times slow down considerably. That is due in large part to the explosion in the number of operator() overloads that must be generated for each Proto expression type. By setting BOOST_PROTO_MAX_FUNCTION_CALL_ARITY lower than BOOST_PROTO_MAX_ARITY, compile times can be sped up considerably.