How To Write Your Own Compiler, Part 1: Mapping Source.
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The version number of BBC BASIC for Windows consists of a numeric part and a letter. If only the letter is changed, it signifies a trivial or cosmetic change, or a minor bug-fix. In general such changes will not affect any existing programs. If the numeric part is changed it signifies a more significant alteration or a bug-fix which might affect the operation of existing programs (for example.
The Basic Compiler Recipe. Although you should already pretty much know this, a compiler is really a grouping of three to four components (there are some more sub-components) where data is fed from one to the next in a pipeline fashion. We will be using a different tool to help us build out each of these components. Here is a diagram of each.
It's actually a port from my previous attempt to write a compiler. Implementing C preprocessor is no easy task. It's a part of the C standard, so it's defined in the spec. But the spec says too little about it that it's not useful to implement by itself. The spec includes a few examples of macros with their expanded forms, but it say only little about the algorithm. I think it doesn't even say.
Writing a compiler involves a vast array of data structures beyond your basic list or map. You'll build trees and directed graphs. You'll need to write code that navigates through those data structures--often using algorithms involving recursion. Managing the complexity is a challenge and you'll likely get ideas for how you might do it in other contexts (e.g., machine learning, networking, etc.
About this paper. This paper is intended to give an overview of basic compiler theory. It is not intended to be complete by any means. It certainly will not replace a college level compiler course, however, it will provide a good solid foundation on which such a course can build.
In this post I'll show how to write a rudimentary, native x86-64 just-in-time compiler (JIT) in. it illuminates the basic mechanics of just-in-time compilation. Our general strategy is to rely on the built-in ctypes Python module to load the C standard library. From there, we can access system functions to interface with the virtual memory manager. We'll use mmap to fetch a page-aligned.