Consider the following code:
The code
public class RecursiveConstructor
{
//When this constructor is called
public RecursiveConstructor():this(One(), Two())
{
Console.WriteLine("Constructor one. Basic.");
}
public RecursiveConstructor(int i, int j)
{
Console.WriteLine("Constructor two.");
Console.WriteLine("Total = " + (i+j));
}
public static int One()
{
return 1;
}
public static int Two()
{
return 2;
}
}
The calling method
public class RecursiveConstructorTest
{
public static void Main()
{
RecursiveConstructor recursiveConstructor = new RecursiveConstructor();
Console.ReadKey();
}
}
The Result
Constructor two.
Total = 3
Constructor one. Basic.
Why is the 2nd constructor run first?
I understand that in chained constructors we call the base class constructor first and then make our way back up the chain but when the constructor is held in the same class why do we still see this behaviour where the extra constructor is called first?
I would have thought that the most basic constructor contents would be executed first.
C programming language is a machine-independent programming language that is mainly used to create many types of applications and operating systems such as Windows, and other complicated programs such as the Oracle database, Git, Python interpreter, and games and is considered a programming foundation in the process of ...
In the real sense it has no meaning or full form. It was developed by Dennis Ritchie and Ken Thompson at AT&T bell Lab. First, they used to call it as B language then later they made some improvement into it and renamed it as C and its superscript as C++ which was invented by Dr.
C is a general-purpose language that most programmers learn before moving on to more complex languages. From Unix and Windows to Tic Tac Toe and Photoshop, several of the most commonly used applications today have been built on C. It is easy to learn because: A simple syntax with only 32 keywords.
What is C? C is a general-purpose programming language created by Dennis Ritchie at the Bell Laboratories in 1972. It is a very popular language, despite being old. C is strongly associated with UNIX, as it was developed to write the UNIX operating system.
I think the compiler runs the safer scenario. If you call another constructor here, there are chances that this other constructor is a prerequisite to your current constructor. This behaviour is consistent with the one exposed when calling base constructors, and is then to be expected.
When creating a new instance of a class, there is a chain of constructors that get called from the least specialized (the constructor of the object class) to the most specialized (the constructor of your current class).
The operator :
allows you to explicitly add a constructor to this chain, so this order seems natural.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With