AstBuilder.java 文件源码

private static ArithmeticBinaryExpression.Type getArithmeticBinaryOperator(Token operator)
{
    switch (operator.getType()) {
        case SqlBaseLexer.PLUS:
            return ArithmeticBinaryExpression.Type.ADD;
        case SqlBaseLexer.MINUS:
            return ArithmeticBinaryExpression.Type.SUBTRACT;
        case SqlBaseLexer.ASTERISK:
            return ArithmeticBinaryExpression.Type.MULTIPLY;
        case SqlBaseLexer.SLASH:
            return ArithmeticBinaryExpression.Type.DIVIDE;
        case SqlBaseLexer.PERCENT:
            return ArithmeticBinaryExpression.Type.MODULUS;
    }

    throw new UnsupportedOperationException("Unsupported operator: " + operator.getText());
}