swift macros

macro to the Class header file, and then include this module in all. CPP files that need to access part class objects. If DELCARE_DYNAMIC and IMPLEMENT_DYNAMIC macros are used as described, you can use the RUNTIME_CLASS macro and CObject: IsKindOf function to determine the object class during running time. If DECLARE_DYNAMIC is included in the class definition, IMPLEMETN_DYNAMIC must be included in the class tool.DECLARE_DYNCREATEDECLARE_DYNCREATE (c

)__attribute__((aligned (n)))To align the structure members to the natural boundary of n Bytes. If the length of a member in the structure is greater than N, the maximum member length is used for alignment.4)__attribute__ ((packed))Cancels the optimization alignment of the structure during compilation and alignment according to the actual number of bytes occupied.The first method above n = 1, 2, 4, 8, 16... is more common. #define CACHE_ALIGNED __attribute__((aligned(CACHE_ALIGN_SIZE)))3. Variab

Implement TODO macros by yourself//turn into a string#define STRINGIFY (S) #S// macros that need to be solved two times before they can be solved#define DEFER_STRINGIFY (s) stringify (s)#define PRAGMA_MESSAGE (msg) _pragma (stringify (MESSAGE (msg))// to beWarningAdd more information#define Formatted_message (MSG)"[todo-]defer_stringify (__counter__)"] "MSG"\ n"defer_stringify (__file__)"line"defer_stringif

You can use macros to define "functions" without return values ". For example: # Define printmax (A, B)/do/{/INT x = A, y = B;/printf ("MAX: % d/N", x> Y? X: Y); //} while (0) //... printmax (3, 4 ); Such a "function" is essentially different from a function in the true sense, because a macro is a pre-compilation behavior and only replaces the text before compilation. In Python source code, we often see macro definitions similar to the following:

Part I: Macro basics A macro is simply a text substitution tool in the C preprocessing phase, which is not visible to binary code after compilation. The basic usage is as follows: 1. Identifier aliases #define BUFFER_SIZE 1024 preprocessing phase, Foo = (char *) malloc (buffer_size);//is replaced with foo = (char *) malloc (1024); Macro body wrapping requires a backslash at the end of the line #define NUMBERS 1, 2, 3 preprocessing phase int x[] = {numbers};//is expanded to int x[] = {1, 2, 3}; 2

How to use macros to print more data, have seen others do, in Excel, she set up a macro, there are a lot of data, names-address-telephone what, like a payroll list just along the distribution, no format. Then you can print it in a good format, only to realize that it is a macro. Excel on the DOT tool--macros--record a new macro, in the macro name that enter a name you know later. It can then be set to the

Some predefined macros in the C language standard The C standard specifies some predefined macros that are often used for programming.The following table is a list of predefined macros that are often used. __date__Date for preprocessing (string literals in the form of "MMM DD yyyy") __file__string literal representing the current source code file name __line_

Small series The last time you start word2007, always prompt "Security warning macros have been disabled," but where is this macro? turned the word option over and over, didn't find it! After a burst of Baidu, Google big search just know in the "Trust Center Settings" inside a "macro settings", add this setting is Office A security defense initiative designed to prevent malicious code from using macros to a

About Swift set types and swift Sets Swift sets are represented by arrays and dictionaries. It perfectly stores everything you want to store. An array is a set of serialized lists of the same type. It is used to store different values of the same type. A dictionary is also an array, but its storage method is similar to Map. It binds values with one click. It is a

Swift video tutorial-swift syntax and Operators The describes how to use Xcode's playground to write and run Swift program code, Swift's program structure, and familiarity with the use of playground tools. It also introduces the basic syntax of the swift language, including identifiers and keywords, constants, varia

This series of articles focuses on learning and researching OpenStack Swift, including environment building, principles, architecture, monitoring, and performance.(1) OpenStack + Three-node Swift cluster + HAProxy + UCARP installation and configuration(2) Swift Principles and architecture(3) Swift monitoring(4)

: Thursday night 8:00-9:30 January 16: First Swift video tutorial-swift syntax and operatorsdescribes how to use Xcode's playground to write and run Swift program code, Swift's program structure, and familiarity with the use of playground tools. It also introduces the basic syntax of the swift language, including iden

commonly used strings , common basic variable definition macros ConstApple has always recommended that we use a const instead of a macro Const Effect : 1. modifier right basic variable or pointer variable int a int *p 2. the const modifier variable is read-only Modifying basic variables//int Const A = 3;//Const int a = 3; int * const p; //P: read-only *p: variable int const * p1; //p1: variable *p1: Read Only const int * p2; //P2:

, y = 4 },{X = 0, y = 4}} -- Print the colorPrint (myPolygon ["color"]) -- Print it again using dot-- NotationPrint (myPolygon. color) -- The points are accessible-- In myPolygon [1] to myPolygon [4] -- Print the second point's x-- CoordinatePrint (myPolygon [2]. x) Program descriptionFirst, create a table. Different from the previous example, In the constructor of the table, there are {x = 0, y = 0 },What does this mean? This is actually a small table, defined in the big table, the small tableT

This article tests three compilers, namely VC, mingw, and GCC, in 32-bit and 64-bit modes. In six cases, the predefined macro values related to 64-bit programming are used. It is of reference significance for cross-platform programming. Agner fog mentioned some reservation Macros in his calling conventions for different C ++ compilers and operating systems. The following is an excerpt. Note: The following content is from calling conventions for diffe

Reference: Http://www.tuicool.com/articles/QZNrErMEven if you try to use Swift to write iOS programs, you will inevitably encounter some of the algorithms are written in C + + language. Then you can only ask "Niang" or "brother" how to call the C + + algorithm with Swift.One, c,c++, objective-c,swift What is the relationship, and what is mixed-.-? 1. brother, of course, although objective-c is an object-or

The code environment is XCODE6.3-BETA3.Swift has dramatically changed the way iOS apps are developed. In this article, I'll list some of the highlights of swift and compare it with objective-c one by one.Note that this article is not an introductory guide to Swift. Apple has released Swift programming Language, and it

After the swift language comes out, new projects may be developed directly using SWIFT, but some situations may occur in the process, some classes or encapsulated modules that have been written with OC, if you don't want to write it again in swift, you can use mixed encoding. This is allowed in ios8. First, it is simple to start with, first study the mixed use in

This page contains content: Delegate (delegation) Fault handling (Error handling) Key value observation (Key-value observing) Target-action Mode (target-action) Type matching and uniform specification (introspection) API availability Using some of the existing design patterns of Cocoa is one of the most effective ways to help developers develop a reasonable design mindset, stable performance, and good extensibility applications. These schemas all depend on the c

Operator Overloading in the Swift tutorial and swift Operator Overloading Http://www.raywenderlich.com/80818/operator-overloading-in-swift-tutorial Author: Corinne Krych Translator: Meng xiangyue blog: http://blog.csdn.net/mengxiangyue This is my first translation. It is inevitable that there will be errors. txt is used for translation, so the format is not very