[sv-bc] ref can be used as formal argument of exported task/function?

Hi,

Is the following testcase is valid?

module tmp();

export "DPI-C" function  func1;

function automatic func1(ref in1,output byte out1);
begin
 out1 = in1;
end
endfunction

endmodule

In LRM P1800-2005,Nothing is said about the use of ref data type in the
formal argument of exported task/function although the restriction on 
imported
task/function is given in section 26.4.4.

Thanks,
Dhiraj



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