Programmer in SF, currently working on the Pinecone programming language, among other projects Mar 30, I wrote a programming language. And yet, I still made a completely new language.
Why would someone want to write yet another programming language? And why do it in C? This article shows you how to avoid all that.
Here are a few advantages of writing your own language:: Only configuration changes write a compiler in its own language needed for replacing the keywords This language can be used as both as a scripting language and as a shell program, like Bash on Unix or PowerShell on Windows but you will make it more user-friendly than PowerShell.
Any custom parsing can be implemented on the fly. Having full control over parsing means less time searching for how to use an external package or a regex library. I believe that this is the main showstopper for a few people who desperately need to parse an expression but are averse to the pain and humiliation induced by the regex rules.
In the first article, I described the Split-and-Merge algorithm to parse a mathematical expression, and in the second one, I described how you can write a scripting language based on that algorithm.
A separation character must separate all CSCS statements.
I define it in the Constants. The Split-and-Merge algorithm consists of two steps. First, you split the string into the list of tokens. Each token consists of a number or a string and an action that can be applied to it. The separation criteria for tokens are an action, an expression in parentheses, or any special function, previously registered with the Parser.
In case of an expression in parentheses or a function, you recursively apply the whole algorithm to the expression in parentheses or to the function with its arguments. This action is applied to the next cell. The last cell always has a null action.
The null action has the lowest priority. The second step consists of merging the elements of the list created in the first step. The merging of two cells consists of applying the action of the cell on the left to the numbers, or strings of the left and of the right cell.
The merging of two cells can only be done if the priority of the action of the left cell is greater than or equal to the priority of the action of the cell on its right.
Otherwise, you merge first the cell on the right with the cell on its right, and so on, recursively, until you reach the end of the list. The priorities of the actions are shown in Listing 1.
First of all, x must be registered as a function with the Parser all CSCS variables are registered and treated as functions. The symbol " " denotes a null action. The second step consists in merging all the cells one by one from left to right. This merge is possible and is analogous to the previous one: Finally you must merge two resulting cells: How does the Parser map them to the functions?
First of all, you define its name in the Constants. ROUND, new RoundFunction ; In order to use all of the translations available in the configuration file, you must also register the function name in the Interpreter, so that it knows it needs to register all possible translations with the Parser: As soon as the Parser gets the Constants.
ROUND token or any of its translations from the configuration file it calls the implementation of the Round function. All function implementations must derive from the ParserFunction class: LoadAndCalculate data, ref from, Constants.
LoadAndCalculate is the main entry point of the Parser, which does all the work in parsing and calculating the expression and returning the result. Implementation of the rest of the functions looks very similar to the implementation of the Round function.
|I wrote a programming language. Here’s how you can, too.||Make it efficient This classic sequence applies to all software development, but bears repetition. Concentrate on the first step of the sequence.|
|This article was published in:||Compiler Basics, Part 2: Building the Scanner Have you ever thought of writing your own compiler?|
Client and Server Functions Using functions, you can implement anything to be used in the CSCS language—as long as it can be implemented in Cthat is. The implementation of the ClientSocket is analogous.
Figure 2 shows an example run of a client and a server on a Mac.Contribute to the development of your favorite programming language. Many interesting programming languages are open source and welcome new contributors but often, the knowledge necessary to contribute is a barrier to entry for most people who never took a CS compiler course.
Just FYI, bootstrapping is actually the process of bringing a compiler to compile its own source code, written in a language it compiles, using an existing compiler (or any other means up to directly encode binaries but that’s very unlikely these days), be it written in the same language it compiles or not.
I wrote a programming language. Here’s how you can, too. and thus you need to write it in a language. I chose C++ because of its performance and large feature set. Also, I actually do enjoy working in C++.
Build My Own Compiler. This sounded like a good idea to me at first.
I do love making things myself, and I’ve been itching for. How is a compiler program compiled?
Update Cancel. ad by JetBrains. they are a description of what one can possibly code. One can write a compiler in a language, if the language is sufficiently powerful. Then you get the answer above. I know it sounds like a snake eating its own tail, but think of it this way: To the compiler, the.
JavaCC facilitates designing and implementing your own programming language in Java. You can build handy little languages for problems at hand or build complex compilers for languages such as Java or C++.
Build your own languages with JavaCC JavaCC makes it a snap to write your own compiler or interpreter for languages of your own . How To Write Your Own Compiler, Part 1: Mapping Source Files. If you're looking for a scripting language, there are good embeddable compilers that suit many scenarios.
Still, if you love to program, chances are you've always had some romantic fascination with compilers and compiler development. Visual Studio Magazine; Visual Studio Live.