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static is a reserved word in many programming languages to modify a declaration. The effect of the keyword varies depending on the details of the specific programming language, most commonly used to modify the lifetime (as a static variable) and visibility (depending on linkage), or to specify a class member instead of an instance member in classes.
In software engineering, double-checked locking (also known as "double-checked locking optimization" [1]) is a software design pattern used to reduce the overhead of acquiring a lock by testing the locking criterion (the "lock hint") before acquiring the lock.
[1] The storage-class specifier auto can be added to these variable declarations as well, but as they are all automatic by default, this is entirely redundant and rarely done. In C, using the storage class register is a hint to the compiler to cache the variable in a processor register.
An IDE that provides static code analysis for C/C++ both in the editor environment and from the compiler command line. Also includes the .NET Compiler Platform (Roslyn) which provides C# and VB.NET analysis. Yasca (retired) 2010-11-01 (2.21) Yes; multiple licenses — C, C++ Java JavaScript — — ASP, PHP, HTML, CSS, ColdFusion, COBOL
Providing a static method that returns a reference to the instance; The instance is usually stored as a private static variable; the instance is created when the variable is initialized, at some point before when the static method is first called. This C++23 implementation is based on the pre-C++98 implementation in the book [citation needed].
The implementation of the idiom relies on the initialization phase of execution within the Java Virtual Machine (JVM) as specified by the Java Language Specification (JLS). [3] When the class Something is loaded by the JVM, the class goes through initialization. Since the class does not have any static variables to initialize, the ...
Static methods in C++ or Java are not associated with instances but classes, and so cannot use this, because there is no object. In other languages, such as Ruby, Smalltalk, Objective-C, or Swift, the method is associated with a class object that is passed as this , and they are called class methods .
Thus in some languages, static member variable or static member function are used synonymously with or in place of "class variable" or "class function", but these are not synonymous across languages. These terms are commonly used in Java , C# , [ 5 ] and C++ , where class variables and class methods are declared with the static keyword , and ...