separate (Compilation_Unit.Produce_Metrics)
procedure Simple_Clause (Current_Compilation_Unit : in out Ada_Compilation_Unit;
                         Program_Unit : in Program_Unit_State_Machine;
                         Halstead : in Halstead_State_Machine;
                         Loc : in Loc_State_Machine;
                         Mccabe : in Mccabe_State_Machine) is

    --===============================================
    -- Simple_Clause ::=
    --   "USE" Simple_Clause_Continued ";"
    --===============================================

    Current_Token : Token_Package.Token;

begin
    -- Simple_Clause

    Get_Next_Token (Out_Token => Current_Token,
                    From => Current_Compilation_Unit,
                    Current_Loc => Loc);

    if "/=" (Token_Package.Value_Of (Current_Token),
             Token_Package.Use_Token) then
        raise Syntax_Error;
    end if;

    -- increment Halstead FOR_USE operator count
    Halstead.Store_Operator ((Kind => Halstead_Operator.For_Use_Halstead));

    Simple_Clause_Continued
       (Current_Compilation_Unit => Current_Compilation_Unit,
        Program_Unit => Program_Unit,
        Halstead => Halstead,
        Loc => Loc,
        Mccabe => Mccabe);

    Get_Next_Token (Out_Token => Current_Token,
                    From => Current_Compilation_Unit,
                    Current_Loc => Loc);

    if "/=" (Token_Package.Value_Of (Current_Token),
             Token_Package.Semicolon_Token) then
        raise Syntax_Error;
    end if;

    -- increment Halstead SEMICOLON operator count
    Halstead.Store_Operator ((Kind => Halstead_Operator.Semicolon_Halstead));

end Simple_Clause;