The BNF allows a wreal declaration without any identifier, for example, wreal; Change syntax from wreal_declaration := wreal [list_of_identifiers]; to wreal_declaration := wreal list_of_identifiers;
Generally need to identify types bound to a single physical wire vs. a bus in SystemVerilog: wreal is a floating point number on a single wire (could be the voltage or current), real is a 64-bit value that could be carried as 64 wires with bool values.
Whatever happens in SystemVerilog, wreal will probably become a typedef in the Verilog-AMS headers.