C# standard question

[Reginald Blue]

This is purely out of curiosity.

In C and C++, the following statements invoke undefined behavior:

int i = 3;
i = i++;

(for reference:
http://www.eskimo.com/~scs/C-faq/q3.3.html )

Does the C# standard specify the behavior for such constructs? A quick test
reveals that the value assigned to i is 3 which is interesting, but not
particularly revealing.

--
Reginald Blue
"I have always wished that my computer would be as easy to use as my
telephone. My wish has come true. I no longer know how to use my
telephone."
- Bjarne Stroustrup (originator of C++) [quoted at the 2003 International
Conference on Intelligent User Interfaces]

 

[Mattias Sjögren]

Does the C# standard specify the behavior for such constructs?

Yes. You may want to see this post

http://blogs.msdn.com/ericgu/archive/2004/04/19/116265.aspx




Mattias

 

[Jon Skeet [C# MVP]]

This is purely out of curiosity.

In C and C++, the following statements invoke undefined behavior:

int i = 3;
i = i++;

(for reference:
http://www.eskimo.com/~scs/C-faq/q3.3.html )

Does the C# standard specify the behavior for such constructs?
Yes.

A quick test reveals that the value assigned to i is 3 which is
interesting, but not particularly revealing.

It's fairly simple in C#. The RHS is evaluated and has a value of 3
while incrementing i to 4. The assignment is then performed, setting
the value of i back to 3.