swift macros

C/C ++I. Standard definition macroThe standard predefined macros are specified by the relevant language standards, so they are available with all compilers that implement those standards. older compilers may not provide all of them. their names all start with double underscores. _ FILE __This macro expands to the name of the current input file, in the form of a C string constant. this is the path by which the preprocessor opened the file, not the shor

You can run macros in several ways. You can always run macros by using the menu commands. You can also run a macro by pressing the Ctrl key, clicking a toolbar button, or clicking an area on an object, graphic, or control, depending on how the macro is run. In addition, you can run macros automatically when you open the workbook. There is a small problem in the r

[Swift learning] Swift programming tour-array of Collection types (6), swift tour Swift provides three main collection types: array, set, and dictionary. This section describes array. An array is a set of the same type of storage order. The same value can appear in different positions multiple times. Note: Swift's Ar

XXX-Swift.h file doesn't appear in the project, but is automatically generated by Xcode, you can find the corresponding project's XXX-Swift.h file in a path similar to the following: (PS: i'm sorry, I didn't write it into the PPT) /Users/perry/Library/Developer/Xcode/DerivedData/XXX-bhlzdinkujybftbjmgwjwclndmss/Build/Intermediates/XXX.build/Debug-iphonesimulator/XXX.build/Objects-normal/x86_64/XXX-Swift.h To use Swift code in OC#import XXX-Swift.h(PS

Macros: macro, preset text substitution mode:A macro is an abstract concept (abstraction) that replaces certain text patterns based on some of the predefined rules of a column, whereas an explanation or compiler automatically replaces this pattern when it encounters a macro. Similarly, Zabbix saves the preset text pattern based on a macro, and replaces it with the text in it when it is called.The built-in {MACRO} does not need to be added $ to referen

This is a profile of an API or technology that is being developed, and Apple provides this information primarily to help you plan through the use of these technologies or programming interfaces with Apple products, which may change in the future, and the software mentioned in this article should be based on the final published operating system tests and final documentation, New versions of document information may be available in the future.Swift is designed to be seamlessly compatible with Coco

.3) loop statements and switch results are not allowed in inline functions. Functions with abnormal interface declarations cannot be declared as inline functions.Let's talk about the differences between macros and functions:1. macros are used to replace simple strings (note that the replacement of strings is not the replacement of other types of parameters), while function parameters are transmitted with da

0.#define MALLOC (n, type) \sizeof(type))1. Macros can be defined like functions, such as:#define MIN (x, y) (xBut in the actual use, only when writing min (), must be parentheses, Min will be as a macro expansion, otherwise do not do any processing.2. If the macro requires parameters, you can not pass, the compiler will give you a warning (macro parameters are not enough), but this will result in an error. As depicted in C + + books, the compiler (pr

You can use the macro recorder to record a series of actions to create Macros macro: An action or a set of actions that you can perform to automate tasks. You can record macros in the Visual Basic for Applications programming language. Or in the Visual Basic Editor Visual Basic Editor: An environment for writing new Visual basic for Applications code and procedures, and editing existing code and procedures.

Excel macros are powerful, but are disabled by default because of security risks, and the following small series teaches you how to turn on macro features that are disabled by default in Excel. Excel macros have been disabled for workaround: Click Office buttons, and then click Excel Options, and then click Trust Center, Trust Center settings, and macro settings. Click the option that you want "Disable

[Swift learning] Swift programming tour-expansion (24), swift tour An extension adds new features to an existing class, struct, or enumeration type, including attributes and Methods. If you define an extension to add new features to an existing type, this new function is available to all existing instances of this type, even if they are defined before your extens

Swift Study Notes (23)-Swift generic knowledge, swift Study Notes The concept of generics also exists in Java. Generics can make code more refined and are an optimization for data types. Now there is the same requirement: Write a struct, and then judge whether the integer is equal. The implementation code and output are as follows: . If there is another dema

I. MAIN objectives(because Visual Studio typically contains many development environments, it is commonly referred to as Visual C + + 20xx)Organize the predefined macros under Visual C + + 2010. To do a memo and understand, in the actual coding can consider using some of the macro as a criterion.Main reference Links: Http://msdn.microsoft.com/en-us/library/b0084kay (v=vs.100). aspxSecond, VC + + 2010 pre-defined macrosNote All of the predefined

Flappybird mini-game with SwiftWith Apple's deep-dive approach to swift, Swift's quick fire and Swift's streamlined syntax and powerful features, it's also necessary to learn about Swift for developers who use OBJECT-C to develop iOS. This blog skips Swift's dry grammar and starts using swift directly from a small game project, summarizing the gains as follows: F

Macros: macro, preset text substitution mode:A macro is an abstract concept (abstraction) that replaces certain text patterns based on some of the predefined rules of a column, whereas an explanation or compiler automatically replaces this pattern when it encounters a macro. Similarly, Zabbix saves the preset text pattern based on a macro, and replaces it with the text in it when it is called.The built-in {MACRO} does not need to be added $ to referen

advantage of macro functions, compared to regular function calls, is that they will be expanded in place prior to compilation, helping to improve the performance of the code (is it a bit of a feeling of inline functions?). ）。 Because macros do not consider data types, it is dangerous to use macros, which needs to be taken into account. In addition, the macro is a simple substitution, the macro function mus

Speaking of macros, I'm afraid everyone can say something: A preprocessing without a semicolon (is it true ?). What then?Well ......Okay, let's start from here.The most common macro may be # include, followed by # define and .......Let's classify the macro's usage: 1. # include is mainly used to include referenced files, so far its position can be replaced by no one; 2. comment out the code. For example:# If 0.......# Endif;This mechanism is currently

The main function of macros is to simplify code writing and to simplify some areas where repeated code is needed to get code that looks more elegant. However, it is not easy to use macros well. Poor macros can easily cause disastrous consequences. This article will introduce some practical techniques for comparing macros.First is the most commonly used techniques

Templates and macrosSome days ago, when the Forum was hitting a storm, someone came up with the conclusion that the template is essentially a macro. As a result, you have had a good debate. I originally wanted to join the debate, but I thought everyone's remarks had covered my ideas, so I did it.Although I did not participate in the discussion, the question "What is the relationship between templates and Macros?" is always on my mind. Every time I rel

actually translates the code in Swift into OC code. Note: If the project is cleaned, the file will be deleted, and the file will be regenerated only if all Swift code is compiled through the rebuild process. Integration of the frameworkStepping on the pit time complex macros in OCThe Swift compiler does