static-constructor

Static constructor is called before any static members are referenced

两盒软妹~` 提交于 2019-12-10 11:12:09
问题 According to the docs: A static constructor is used to initialize any static data, or to perform a particular action that needs to be performed once only. It is called automatically before the first instance is created or any static members are referenced . But i saw in stackoverflow post, the following quote from the C# specification: If a static constructor (§10.12) exists in the class, execution of the static field initializers occurs immediately prior to executing that static constructor.

Controlling when the Static Constructor is called

纵饮孤独 提交于 2019-12-10 06:08:28
问题 In my custom attribute's static constructor, I search the loaded assembly for all classes decorated with my attribute and perform some action on them. I would like the static constructor to be called as soon as possible during runtime, preferably before execution of the static void Main() entry point. Currently it only gets called after I make some call to the attribute. I could make such a call elsewhere in my program, but ideally the attribute's functionality would be self-contained.

Why isn't the static constructor from my base class called? [duplicate]

风格不统一 提交于 2019-12-10 03:12:27
问题 This question already has answers here : What's the best way to ensure a base class's static constructor is called? (6 answers) Closed 6 years ago . Lets say I have 2 classes: public abstract class Foo { static Foo() { print("4"); } } public class Bar : Foo { static Bar() { print("2"); } static void DoSomething() { /*...*/ } } I expected that after calling Bar.DoSomething() (assuming this is the first time I access the Bar class) the order of event will be: Foo's static constructor (again,

Private vs Static constructors in .Net

▼魔方 西西 提交于 2019-12-09 05:59:43
问题 I searched for this a lot, but none of the answers are clear (at-least for me!). Now I'm putting this question in SO, as I believe I can't get a more clarified answer anywhere else. When should I use a private/static constructor in my class? I'm fed up of usual answers, so please help me with some real-time examples and advantages/disadvantages of using these constructors. 回答1: Static constructors: used for initialising static members. Private constructors: used when you only want a class to

Static initializer in Objective-C upon Class Loading

亡梦爱人 提交于 2019-12-08 02:03:01
问题 I am trying to build something to dynamically instantiate an object from class-name similar to how Java's Class.forName method works, e.g. Class klass = Class.forName("MyClass"); Object obj = klass.instantiate(... I didn't see any such behavior in Objective-C so I would like to call a method to register Class when an Objective-C class is loaded. Basically, I would like to call a method that registers my class, e.g. + (void)mystatic { [NSKeyedUnarchiver setClass:[self class] forClassName:

c++/cli static constructor of derived class is not called

匆匆过客 提交于 2019-12-07 12:53:33
问题 As described in another SO post of me I saw a strange behaviour of my application after moving from VS 2008 (.net 3.5) to VS 2013 (and using .net 4.0, not 4.5). I found that the static constructor (cctor) of a class was not called any more. Therefore I broke the application down into a small test program: DLLs testAssembly_2-0 and testAssembly_4-0 (similar content; testAssembly_4-0 has names with 40 instead of 20 ) namespace testAssembly_20 { public ref class Class20 { public: Class20 () {

Is RunClassConstructor guaranteed to run a type's static constructor only once?

大憨熊 提交于 2019-12-07 00:18:10
问题 I'm calling the static ctor of a class using this code: Type type; System.Runtime.CompilerServices.RuntimeHelpers.RunClassConstructor(type.TypeHandle); Can this cause the cctor to be run twice? 回答1: RunClassConstructor runs the static constructor only once, even if you call it twice. Just try ;) using System.Runtime.CompilerServices; ... void Main() { RuntimeHelpers.RunClassConstructor(typeof(Foo).TypeHandle); RuntimeHelpers.RunClassConstructor(typeof(Foo).TypeHandle); Foo.Bar(); } class Foo

Static initializer in Objective-C upon Class Loading

走远了吗. 提交于 2019-12-06 13:32:23
I am trying to build something to dynamically instantiate an object from class-name similar to how Java's Class.forName method works, e.g. Class klass = Class.forName("MyClass"); Object obj = klass.instantiate(... I didn't see any such behavior in Objective-C so I would like to call a method to register Class when an Objective-C class is loaded. Basically, I would like to call a method that registers my class, e.g. + (void)mystatic { [NSKeyedUnarchiver setClass:[self class] forClassName:"MyClass"] } Is there a way to do this in Objective-C on OS X platform? Thanks. You want to use

Static constructor is called before any static members are referenced

放肆的年华 提交于 2019-12-06 05:17:35
According to the docs: A static constructor is used to initialize any static data, or to perform a particular action that needs to be performed once only. It is called automatically before the first instance is created or any static members are referenced . But i saw in stackoverflow post, the following quote from the C# specification: If a static constructor (§10.12) exists in the class, execution of the static field initializers occurs immediately prior to executing that static constructor. It's contradicting, i don't understand what come first, the static constructor or the static member

How does the CLR handles static classes?

做~自己de王妃 提交于 2019-12-06 03:36:36
Can anyone explain how the CLR handles Static classes? Does the CLR create one singleton instance for handling static classes internally? If not, why do we have a static constructor in C#? (Per my understanding, we use constructors only for instantiating the class) Sriram Sakthivel First of all there is no static class in CLR. CLR doesn't know anything about static class. It is the feature of C#. Static classes are compiled into abstract as well as sealed class. Making it abstract prevent instantiation of it and sealed prevents inheritance. Static classes are no special, it is just a simple