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C in four functions (c4) - A Minimal C Compiler and VM

A single-file C compiler implemented in approximately 500 lines of C, demonstrating the core concepts of compilation and self-hosting.

C
Added on 2025年7月6日
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C in four functions (c4) - A Minimal C Compiler and VM preview
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Project Introduction

Summary

C4 is a remarkable project that implements a functional C compiler and a virtual machine within a single C source file, focusing on clarity and minimalism.

Problem Solved

This project demystifies the complex process of compilation by providing a highly simplified, self-contained, and readable example of a C compiler, making it an excellent educational tool.

Core Features

Minimal C Subset Compiler

Compiles a small but useful subset of the C language.

Integrated Virtual Machine

Includes a built-in virtual machine to execute the generated bytecode directly.

Self-Hosting Capability

The compiler is capable of compiling its own source code, illustrating the concept of self-hosting.

Tech Stack

C

使用场景

While not a production-ready compiler, C4 serves as an invaluable resource in educational and exploratory contexts:

Educational Resource for Compiler Principles

Details

Studying the C4 source code is an excellent way to learn the basic steps involved in compiling a programming language from source to execution.

User Value

Simplifies complex compiler concepts into an easily digestible example.

Platform for Compiler & VM Experiments

Details

Experimenting with modifying or extending the compiler or the virtual machine provides hands-on experience with language implementation.

User Value

Offers a low barrier to entry for hacking on language tools.

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