Axiom.Compiler.Framework.PrologCodeParser.ProcessHeadlessClause C# (CSharp) Метод

        private void ProcessHeadlessClause(PrologCodeTerm term)
        {
            PrologCodeHeadlessClause clause = (PrologCodeHeadlessClause)term;
            foreach (PrologCodeTerm t in clause.Goals)
            {
                if (t is PrologCodePredicate)
                {
                    PrologCodePredicate pred = (PrologCodePredicate)t;
                    switch (pred.Name)
                    {
                        case "op":
                            ProcessOperator(pred);
                            break;
                        case "class":
                            PrologCodeTerm arg = (PrologCodeTerm)pred.Arguments[0];
                            if (arg is PrologCodeConstantAtom)
                            {
                                PrologCodeConstantAtom atom = (PrologCodeConstantAtom)arg;
                                _codeUnit.Class = atom.Value;
                            }
                            else if (arg is PrologCodeStringAtom)
                            {
                                PrologCodeStringAtom atom = (PrologCodeStringAtom)arg;
                                _codeUnit.Class = atom.Value.Replace("'", "");
                            }
                            else
                            {
                                _errors.Add(new PrologCompilerError("P0002", "Illegal class name.", "", false, _scanner.Current.Line, _scanner.Current.Column));

                            }
                            break;
                        case "foreign":
                            ProcessForeignMethod(pred);
                            break;
                        case "load_assembly":
                            ProcessAssemblyDirective(pred);
                            break;
                        case "using":
                            ProcessUsingDirective(pred);
                            break;
                    }
                }
                else if (t is PrologCodeList)
                {
                }
            }
        }