Hi all, I am a beginner of C# language and have a question about const.
Does C# allow to use const keyword to parameter option like C/C++
After trying several times, I wonder that C# doesn't.
If so, aren't there ways to avoid the code like this :
class Hoge {
.... methods or something are declared...
}
class HogeHoge {
public UseHoge( ref Hoge h ) {
h.someproperty = 12345; // not problem to change some properties of h
h = new Hoge(); // this may be a mistake.
}
HogeHoge.UseHoge() doesn't always be good.
I think there will be situations that I want to make sure that the methods
never replace the address of referrence type objects in them.
thanks.
usage of const
Philip Harris
In addition to the (correct) reply you got, one thing that bit me early on is that C# has const, but it's not the same. const is for compile time values. If you want to const a runtime value in a class, you need to make it readonly, then you can set it's value in your constructor, but it cannot be changed after that.
Hope_UAE
Specfiction
Thanks.
I can understand what you mean.
As you said, I know only C/C++ and was confused to learn C#.
nick0033
Hmm... if you don't want to change the reference don't use ref then. There's no other reason to use ref for a parameter other than changing the reference itself. Since you are asking about const I suppose you're a C/C++ programmer. Your example is equivalent to the following C++ code:
class HogeHoge
{
public:
void UseHoge(Hoge **h) {
(*h)->someproperty = 1234;
*h = new Hoge;
};