c macro code generation

If your source file contains any #include statements it is probably a good idea to send the output of gcc-E to a file so you can scroll down past the thousands of lines of text they may generate. Alexandrescu dedicates two chapters to the visitor pattern and automatically generating class hierarchies, which seems exactly like what you're looking for. How can I design fun combat encounters for a party traveling down a river on a raft? :-), Supermacros: Powerful, maintainable preprocessor macros in C++, use a Makefile to generate eg. But you probably wouldn't need a wrapper in the first place. 3 - Zontroy Inner Repeating File (ziref . In the above code snippet, we can see we used the object like macro PI inside the function like macro Area. However, keep in mind that if parameter names are informative indeed unlike your example, e.g. If QSettings itself was designed with templates in mind, you wouldn't need this. I've written about this in The awesome power of type introspection, which often goes hand-in-hand . In the above example, in the introduction, we saw the macro with the name PI and value 3.14 it is an example of an object like macros. C and C++ are relatively non-dynamic languages, and one thing this means is that not repeating yourself (aka DRY) is often harder than in a language like Python. Find centralized, trusted content and collaborate around the technologies you use most. I admit its not beautiful artwork. No. // This is an object-like macro #define PI 3.14159265358979 // This is a function-like macro. The CCodeGenerator package is a key component of code generation from the Wolfram Language. Here macro name PI at the 11th line got replaced with the macro value 3.14 as we saw in the definition, and we got the area of a circle as the output. Many mathematical formulas are broken, and there are likely to be other bugs as well. Why? The macro in C language is known as the piece of code which can be replaced by the macro value. excel 2010 barcode macro: Designing and architecting for cloud scale in *Re: [RFC Patch, Aarch64] : Macros for profile code generation to enable gprof support 2013-08-03 18:01 [RFC Patch, Aarch64] : Macros for profile code generation to enable gprof support Venkataramanan Kumar @ 2013-08-09 10:48 ` Venkataramanan Kumar 2013-08-09 17:17 ` Marcus Shawcroft 2013-08-27 7:46 ` Marcus Shawcroft 2 siblings, 0 replies; 7+ messages . The code generation X-factor - macoy.me In this tutorial, you will be introduced to c preprocessors, and you will learn to use #include, #define and conditional compilation with the help of examples. Let's see the different types of macros one by one. See in the above code, we added the function-like macro at line no. For example, here is short program that includes a macro that prints the source code and value of an expression: Without using a macro, there is no way to capture the text string "2+2" so we can print it. With the Loop Builder you can generate conditional loops with a few simple clicks. The assert macro is a more sophisticated version, which uses the built-in macros __FILE__ (which expands to the current source file as a quoted string) and __LINE__ (which expands to the current source line number, not quoted) to not only print out an offending expression, but also the location of it in the source. Specify the first input type as a 1-by-4 vector of unsigned 16-bit integers. It contains the current line number on which this macro is used. Code generation using macros | Rust Programming Cookbook - Packt The speaker said dont repeat yourself about 6 times in the first couple of minutes. Macro "parameter" name mesh. We can write multi-line macro same like function, but each statement ends with "\". End With. Macro in C programming is known as the piece of code defined with the help of the #define directive. Which is best combination for my 34T chainring, a 11-42t or 11-51t cassette, Tips and tricks for turning pages without noise. Object-like macros resemble data objects when used, function-like macros resemble function calls. Asking for help, clarification, or responding to other answers. Connect and share knowledge within a single location that is structured and easy to search. Where this feature does become useful is if you want to be able to refer to part of the source code of your program. i want to print QR Code for this how to . It's not the solution that you want, but the simplest thing is of course to just keep a reference/pointer to the QVariantMap in the struct. Dim myVal As Integer. Not the answer you're looking for? One problem with using a lot of macros is that you can end up with no idea what input is actually fed to the compiler after the preprocessor is done with it. This lets you write FakeArray(12) instead of fakeArrayVariableNumber12. Which is best combination for my 34T chainring, a 11-42t or 11-51t cassette. @Yu, Im afraid inih is only a parser, and cant write out .INI files. 504), Hashgraph: The sustainable alternative to blockchain, Mobile app infrastructure being decommissioned. X macros are a C preprocessor technique for reducing boilerplate code, thus increasing code quality and maintainablity. Within the base, the only things that need to be customized are members types and names. So, in this post I'm going to compare three different approaches: Generating code using string templates ( Twirl ). @Joker_vD OOPS sorry, you're right in both. How to make a variadic macro (variable number of arguments), C++ template type that can be stored in a std::map and then exposing the map publicly. The thing is, Ive been using this technique in my projects for years, I called them templates. Your feedback is important to help us improve, Value or code segment gets replaced with macro name, The macro which takes an argument and acts as a function. 7. Metaprogramming is a programming technique in which a piece of code manipulates some other code. the functional macro Area and then the child macro gets expanded i.e. ' Repeat the steps for each row from 2 to 6. After some reading I discovered X-Macros. After that marker, the rest of the line specifies a command for go generate to run. 5.11. Options related to a particular phase Glasgow Haskell Compiler Since all your structs would have been different (or you wouldn't need the macros), you presumably have to write code somewhere that would be specialized for each specific struct. Simulink adds a Simulink.Parameter object named p1 to the model workspace. Book or short story about a character who is kept alive as a disembodied brain encased in a mechanical device after an accident. In the property dialog box for p1, click OK. Customize code generation using IBM Rational Rhapsody for C++ Thanks for contributing an answer to Stack Overflow! Multiline macros in C - GeeksforGeeks Macro is a piece of code or value that is replaced with the macro name before the execution of the program. Let's consider the following code example which is the modification of the previous code -. C++: Inline functions and link time code generation; Free UML tool with c++ code generation and doxygen support; C and Matlab: Why does this one line in Matlab become so many lines in C++ code generated by Matlab Coder? Introducing C# Source Generators - .NET Blog Here is an example for the QString parameter type: Since I'm using C++, I know that macro usage is bad. Coding example for the question C/C++ macro to repeat code-C++. 22. Nevertheless, macros are still used in some places. www.OnBarcode.com. Generating C++ code using Python and CMake - The Scheming Developer In this tutorial, you use the MATLAB Coder app to generate a static C library for a MATLAB function. 4. Object-like Macros (The C Preprocessor) - GNU Compiler Collection macro expanding to adding a trailing comma, and then include Runtime code generation with Python Metaprogramming Tutorials - C Preprocessor Tricks - Cprogramming.com #define type i##nt type a; // same as int a; since i##nt pastes together to "int". String Conversion Operator: # 40-years before that #-tag became a cultural phenomenon, this operator was available in the C preprocessor. Here's how the macro looks like: Macro header. Now run it. Code generation with Metaprogramming. To get rid of this, you can specify all parameter types within MySettings, like this: You could of course further generalize this class to be used as a base for other settings classes. This code is perfectly readable and it maintains the integrity between the enum and the array well. Supermacros: Powerful, maintainable preprocessor macros in C++ Three tips for using M4: use a Makefile to generate eg. Name of the pre-defined function that generates input. Completely available to be integrated with for MS Office Excel 2016, 2013, 2010 & 2007; Create GS1 128 barcodes in Excel spreadsheets immediately with this Excel add-in The code generator within a compiler is responsible for converting intermediate code to target code. all the time. The macro in C language is classified based on the different types of values that it replaces. We could, in theory, expand the code generation capability to allow multiple passes through a file, which would allow one C-like-macro to expand into another C-like-macro, which is then expanded into real code in a subsequent pass. I try to avoid the Boost preprocessor library, but if you have a nice solution which uses that, go ahead. AutoMacro's VBA code generators build code from scratch via visual interfaces. See Stephan Beals paper, Supermacros: Powerful, maintainable preprocessor macros in C++. One of the many advantages is the perfect portability of ANSI-C plus Macro-Magic based projects. barcode generator library source code number using c#/vb.net/asp.net Option 1 - Convert auto-generated code to user-managed code (click to collapse or expand) Option 2 - Requirements generation into the auto-generated code (click to collapse or expand) Also read "Table of Contents > Comments > Comment Style" section for changing comment style for auto-generated code. To concatenate things that aren't strings, use the ## operator, as in. This produces the following from the preprocessor (after running through astyle): EDIT: I'm not 100% sure the typeid comparisons will work like this, but it should be straight forward to replace it with a check that does work. CSharp Macros - let the Roslyn type for you - Cezary Pitek Blog 5.11.3.1. Note that there is generally no good reason to ever do this. To do this in X-Macro style, we just #include "config.def" repeatedly, but #define CFG to what we need each time we include it. An example might be something like this malloc wrapper: (Strictly speaking, this is probably more of a "non-semantic" macro.). foo.c from foo.c.m4 use --prefix-builtins with m4 using --synclines will help to more quickly jump to errors because your error messages etc will refer to the m4 file, not the generated C file. Below are the programs to illustrate the use of macros in C/C++: Program 1: C C++ #include <stdio.h> #define LIMIT 5 int main () { printf("The value of LIMIT" " is %d", LIMIT); return 0; } Output The value of LIMIT is 5 Program 2: C C++ #include <stdio.h> #define AREA (l, b) (l * b) int main () { int l1 = 10, l2 = 5, area; area = AREA (l1, l2); Till now, we have seen how to define the macros, their types and how to use them. You need to sign in, in the beginning, to track your progress and get your certificate. Nothing restricts a macro expansion to a single line, although you must put a backslash at the end of each line to keep it going. Choose " QRCODE " in the Barcode Type selection bar and enter the data in the Data zone. Code repetition should be avoided, but programmers tend to exaggerate how bad it is. Find centralized, trusted content and collaborate around the technologies you use most. These will most likely not be fixed. The first operator converts the input parameter to a string, and the second operator allows tokens to be pasted together to create a new symbol or declaration based on the input. Data Matrix for Excel Generator Add-in - Convert Data into Barcodes So the C macro system is a simple code generation scheme. To define a variadic macro, define a macro with arguments where the last argument is three periods: . I have done this in the past when I wanted to create a library useful for storing uint32_t or uint64_t types, and had initially used CPP in this way. I need a VBA to generate consecutive numbers from given range Not the answer you're looking for? and was missing a submodulle https://github.com/benhoyt/inih.git Any suggestion can I write something into the ini file? The next step in generating a C executable is to create a coder.config object for an executable and provide a main.c function to this object. 2.1 File-based X Macros myBarcode.Value = mySheet.Cells (myVal, 1).Text. No problem! One good way around this problem is code generation for example, using an XML spec with Python and Cheetah templates to generate C code. The comma operator evaluates both of its operands and returns the value of the one on the right-hand side. [Solved]-MATLAB C++ Code Generation-C++ - Hire Developers, Free Coding UCC/EAN-128 Drawn Multipage Tif Online Shop - Java, C#, VB.NET, ASP.NET 0000010a setup: 10a: 00 00 nop 10c: 00 00 nop 10e: 00 00 . There are three types of Zontroy template files to meet all generation needs. It contains the current date in MMM DD YYYY format. Is // really a stressed schwa, appearing only in stressed syllables? Thanks for contributing an answer to Stack Overflow! function y = mcadd (u,v) %#codegen y = u + v; Generate the C library files in a custom folder mcaddlib using the -config:lib option. Hiding members is good. Use this function to: Select C/C++ files that define the interface. To learn more, see our tips on writing great answers. Is this using macros to define classes that fit a pattern in C++ a On the Code Generation tab, click the Configure in Coder App button. 3 approaches to Scala code generation - yefremov.net In this case, I prefer a macro that generates an entire struct rather than a piece of code within another class, hence probably polluting its scope. So macros gave us the advantage to use the same macro for different datatypes because there is no type checking of arguments. It is a good idea to use the macros in code as per the requirement and utilize the different types of macros. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. c++ - Code generation with macros: Class with members and constructor Let's see the working of all of these predefined macros with the help of a coding example-, This program includes modules that cover the basics to advance constructs of C Tutorial. The ## operator takes two separate tokens and pastes them together to form a single token. There are some predefined macros in C that we can directly use in the program and they aren't modifiable. The settings class would then inherit all those individual structs. (PDF) Macro C : C code generation within maple - ResearchGate No need for external tools which might not be available nor run, no hassles when the code is ported to another platform, architecture, compiler + tools chain, IDE, make system or any. A trivial example would be. To generate C code and export XML descriptions, build the component model. Object-Like Macro This macro can be a pointer variable or identifier or variable defined using #define and it is replaced by its value. In contrast, preprocessor "macro" systems, like that of C and C++, perform textual manipulation and substitution before any actual parsing or interpretation occurs. This article contains a list of predefined macros in C language with examples and explanations. Generate C Static Library Files in a Custom Folder Write a MATLAB function, mcadd, that returns the sum of two values. There are multiple types of preprocessors such as #define, #if, #error, and #warning etc., They all start with the # symbol. There are a number of steps involved between writing a program and executing a program in C / C++. You can have multiple arguments to a macro, e.g. // Note that we can use previously defined macros // in other macro . The GHC driver pre-defines several macros when processing Haskell source code (.hs or .lhs files). CCodeGenerate [ comp, fun, file] generates C code for compiled function comp, using function fun, and saves in file. Home Services Web Development . You then generate C code that can accept inputs of many different sizes. ' #define ' is followed by the name of the . The body of a macroi.e., the part after the macro and optional argumentsis known as the substitution list.Above, the substitution list is the single token 123 for OL, and the token list ((x)+1) for FL.. Macro expansion occurs after the C/C++ preprocessor, cpp, has turned the program source code into a series of lexical tokens.Identifiers such as FL, numbers, character literals, quoted . C/C++ Code Generation - MATLAB & Simulink - MathWorks When we use one macro inside another macro, then it is known as the chain-like macro. Let's see what are the different types of macros present in the C language. setTitle, setColor etc. link For example, debug macros such as ASSERT, VERIFY, TRACE etc. I need to set a VBA code to. Real world uses of the token pasting operator often involve . It provides a number of functions, which are described below, that make use of the Wolfram System compiler for generating C code. I gave a Qt example (QString) but it is a more general question. Create definition file for C++ library - MATLAB clibgen enum_print(enum foo_t foo) >>> this was major! It only has one small problem and that is code repetition. If you want to write a macro that looks like a function call but contains multiple statements, the correct way to do it is like. Here are some of the most used ones: #include - Include the contents of a file inside your file. : operator, as in. And one gains so much speed in enhancing or changing the parts based on these macro-technique. C99 added variadic macros that may have a variable number of arguments; these are mostly useful for dealing with variadic functions (like printf) that also take a variable number of arguments. The only inconvenience is that the caller needs to specify the return type of param() apart from the parameter number. You need MATLAB Coder to generate standalone C and C++ code for supported functions. However, you may very well find that M4 can be more useful/powerful for this, and avoids many of CPPs limitations (although it adds a few of its own). To build the model and generate code, press Ctrl+B. Sticking with show-me-the-code, heres a program that loads, stores, and prints our config: Note that config.def is included 4 times, so youd have to repeat yourself 3times with no X-Macros. A macro is a fragment of code which has been given a name. C# Code 128 Generator Control to generate Code 128 in C# class, ASP.NET, Windows Forms. 1 C Enumerations and Boilerplate Code; 2 X Macros. Macros have multiple types and there are some predefined macros as well. Open src/lib.rs and add the first simple macro: // Repeat the statement that was. All generators are also iterators. Thank you all! Unlock full access Continue reading with a subscription Generate C Code from MATLAB Code - MATLAB & Simulink - MathWorks 15 and line no. Parameter for the function. Code updates in real-time allowing you to see the impact of your changes. 3 Macros. PI. Stack Overflow for Teams is moving to its own domain! Macro template - multiline text that will be repeated for every element generated by the macro function. However, I very much prefer a simple solution, if there is any. For a list of functions that support code generation, see Function List (C/C++ Code Generation). it will be the case that FOO will expand to BAR which will then expand to (12). This is generally a good way to make your code completely unreadable. I need several classes of this style, and I want the definitions to be as clean as possible for maximum maintainability (regarding typos in the string keys), readability and automation. An alternative way is to use Metaprogramming . On a raft defined using # define directive but each statement ends with & quot in. And there are some predefined macros in C++, use the # define & x27!, copy and paste this URL into your RSS reader requirement and utilize the different of... Model and generate code, we can see we used the object like PI! Here & # x27 ; ve written about this in the data zone no. Moving to its own domain function-like macro, the rest of the one on the right-hand.. The function-like macro ini file, Ive been using this technique in which a piece of code some! Following code example which is best combination for my 34T chainring, 11-42t. Macros as well perfect portability of ANSI-C plus Macro-Magic based projects ; QRCODE & quot ; in the macro. Code updates in real-time allowing you to see the impact of your program them together to a. There is no type checking of arguments paste this URL into your RSS reader I fun!: use a Makefile to generate code, thus increasing code quality maintainablity. A parser, and cant write out.INI files have multiple arguments a. Code which can be a pointer variable or identifier or variable defined using # define and it is class!, we can see we used the object like macro Area bugs as well,... Example which is the perfect portability of ANSI-C plus Macro-Magic based projects between! In some places macro system is a function-like macro the contents of a file inside your file files define... Generate eg written about this in the first place QString ) but it is your example, macros. Is if you have a nice solution which uses that, go ahead, I very much prefer simple!, e.g.hs or.lhs files ) based projects - multiline text that be... Your changes called them templates this how to that are n't strings, the..., keep in mind that if parameter names are informative indeed unlike your example debug! Scratch via visual interfaces processing Haskell source code (.hs or.lhs files ) single token comp fun! And the array well a mechanical device after an accident available in the first place objects used! And that is code repetition inherit all those individual structs manipulates some code... On which this macro is a key component of code generation from the Wolfram system compiler for C. Child macro gets expanded i.e become useful is if you want to print code. Kept alive as a 1-by-4 vector of unsigned 16-bit integers code generation from the parameter number C C++. Write out.INI files combination for my 34T chainring, a 11-42t or 11-51t cassette 40-years... A few simple clicks a C preprocessor technique for reducing boilerplate code we! In stressed syllables and saves in file supported functions using this technique in my projects years... Like: macro header GHC driver pre-defines several macros when processing Haskell source code (.hs or.lhs files.! Beginning, to track your progress and get your certificate because there is no type checking of.... Other bugs as well to subscribe to this RSS feed, copy and paste this c macro code generation your. Driver pre-defines several macros when processing Haskell source code of your program 34T chainring, a 11-42t 11-51t! Src/Lib.Rs and add the first simple macro: // Repeat the statement that.... Pre-Defines several macros when processing Haskell source code (.hs or.lhs files ) to specify the place... The C macro system is a key component of code generation scheme and easy to search advantages is perfect... Is best c macro code generation for my 34T chainring, a 11-42t or 11-51t cassette, tips and tricks for turning without... Simulink.Parameter object named p1 to the model workspace ones: # include - the! Which uses that, go ahead Convert data into Barcodes so the C is! Generation, see function list ( C/C++ code generation from the Wolfram system compiler for C!: Powerful, c macro code generation preprocessor macros in C++ three tips for using M4 use! Of predefined macros in C++, use a Makefile to generate standalone C C++... Without noise used ones: # include - include the contents of a inside... Can be replaced by the macro value the impact of your changes 92 ; & # x27 ; VBA... A file inside your file the return type of param ( ) apart from the number! Your progress and get your certificate in C language is known as the piece of code defined the... A party traveling down a river on a raft the interface library in! Comp, fun, and there are three types of macros present in the beginning to... On the different types of macros a nice solution which uses that, go ahead class would inherit... Beginning, to track your progress and get your certificate ANSI-C plus Macro-Magic based projects Enumerations... Form a single location that is code repetition been using this technique in which a piece of code can... Function to: Select C/C++ files that define the interface.lhs files ) the first place single that. To sign in, in the C macro system is a more general question you 're right both! The sum of two values encased in a mechanical device after an accident objects when used function-like! Are still used in some places a single token many different sizes for using M4: a! Rss feed, copy and paste this URL into your RSS reader can be replaced by its...., e.g and names that is structured and easy to search available in the C.. That support code generation ) want to print QR code for this how to between! How bad it is alternative to blockchain, Mobile app infrastructure being decommissioned '' > 5.11 find centralized c macro code generation content... Share knowledge within a single location that is code repetition should be avoided, but if you want print... // note that we can write multi-line macro same like function, mcadd, that make of... Generated by the macro in C programming is known as the piece of generation! Hashgraph: the sustainable alternative to blockchain, Mobile app infrastructure being decommissioned a who... Help of the source code of your program the caller needs to specify the first input as! Present in the Barcode type selection bar and enter the data zone try to avoid the Boost preprocessor library but. Multiple arguments to a macro is used class, ASP.NET, Windows Forms c macro code generation before that -tag... Generate C code and export XML descriptions, build the model workspace C++ three tips for using M4: a! Model workspace fun, and cant write out.INI files and utilize the different types of values that replaces... Example for the question C/C++ macro to Repeat code-C++ of two values ( ) apart from the parameter number need... The most used ones: # 40-years before that # -tag became a cultural phenomenon, this operator was in! A file inside your file to specify the return type of param ( ) apart from the number. Ini file still used in some places, which are described below, that make use the. Are the different types of macros been using this technique in which a piece code! To specify the first simple macro: // Repeat the steps for each row from 2 to.... Contains a list of functions that support code generation from the Wolfram system compiler for generating code... That is code repetition should be avoided, but if you have a nice solution which uses,. To form a single token and generate code, press Ctrl+B was missing a submodulle:. Ghc driver pre-defines several macros when processing Haskell source code of your program fragment of code can! Argument is three periods:, trusted content and collaborate around the technologies you use.! Last argument is three periods: visual interfaces to build the component model ; # define.! Paste this URL into your RSS reader then expand to ( 12.!, Mobile app infrastructure being decommissioned that make use of the Wolfram compiler! # 92 ; & quot ; in the C language is known as the piece of code which can replaced... Was missing a submodulle https: //github.com/benhoyt/inih.git Any suggestion can I write something into the file. And it is a programming technique in my projects for years, I called them templates this! Example, e.g datatypes because there is no type checking of arguments which c macro code generation be replaced the. I gave a Qt example ( QString ) but it is replaced by the macro like... That returns the sum of two values two values generate to run gains much! Is best combination for my 34T chainring, a 11-42t or 11-51t cassette, tips and tricks for pages! Feature does become useful is c macro code generation you have a nice solution which uses that, go ahead saves... Yyyy format and enter the data in the data in the first c macro code generation:! Are n't modifiable inih is only a parser, and saves in file for generating C code for this to. Use in the awesome power of type introspection, which often goes hand-in-hand resemble function.! I design fun combat encounters for a list of predefined macros as well functions, which described. Members types and names example for the question C/C++ macro to Repeat code-C++ # 40-years before that # -tag a... Be customized are members types and names macro for different datatypes because there is.! Us the advantage to use the same macro for different datatypes because there is Any 2.1 File-based X macros =... Values that it replaces command for go generate to run statement ends with & quot ; & x27.