private DomainId <IAstNode> CreateRelationalOperation( int relationalOperator, string definition, DomainId <IAstNode> leftExpression, DomainId <IAstNode> rightExpression, string operatorText) { switch (relationalOperator) { case QlParser.ISEQUAL: return(m_astFactory.CreateEqualityOperation( definition, leftExpression, rightExpression)); case QlParser.ISNOTEQUAL: return(m_astFactory.CreateInequalityOperation( definition, leftExpression, rightExpression)); case QlParser.ISGREATERTHAN: return(m_astFactory.CreateGreaterThanOperation( definition, leftExpression, rightExpression)); case QlParser.ISGREATERTHANOREQUAL: return(m_astFactory.CreateGreaterOrEqualOperation( definition, leftExpression, rightExpression)); case QlParser.ISLESSTHAN: return(m_astFactory.CreateLessThanOperation( definition, leftExpression, rightExpression)); case QlParser.ISLESSTHANOREQUAL: return(m_astFactory.CreateLessOrEqualOperation( definition, leftExpression, rightExpression)); default: throw new ParserException($"The relative operator '{operatorText}' is not recognized.", null); } }