How to create a computer language?

? It is difficult to design a language directly if you only have the basic knowledge of general programming. Combined with my personal experience, the following path should be more suitable for beginners: you need to have basic knowledge of compilation principles. On the one hand, the basic knowledge of compilation principles comes from your experience in using existing languages and your understanding of basic terms. For example, if I use C, then at least I know that language elements include macros, expressions, statements, statement blocks, functions, pointers and so on. I also know that C language has three stages: compilation, linking and execution. These basic concepts are necessary for you to master the learning process macroscopically. On the other hand, the common sense of compilation principles should come from books. For example, The Book of Dragons and SICP.

? In this step, you should know that most language processing is divided into four stages: morphology, grammar, semantics and code generation. What do you do at each stage? Understand the specific compilation algorithm. How much you know depends on whether you use third-party tools or need to start with people yourself. Personally, Chomsky grammar system, EBNF, regular expression and recursive descent analysis of LL( 1) must be mastered. There are concepts of LL(k) and LR(k). Among them, the analysis of four operational expressions is a good exercise. Sense of grammar.

? There are two difficulties in designing a language for beginners. First, I don't know what kind of grammar/semantics you need; Second, I don't know if the grammar you designed can be realized. Do you need a script similar to natural language, or is it just an expression? After three stages of training, I think you have the ability to write grammar independently. You can write a basic version. Be aware of your language, especially vocabulary and grammar. This step is best to log out as much information as possible, such as word list, and print out the analysis tree.