C Compiler in 500 Lines of Python: A Single-Pass Approach
2025-09-04
The author undertook the challenge of writing a C compiler in just 500 lines of Python, targeting WebAssembly. To achieve this, a single-pass compilation strategy was employed, foregoing an Abstract Syntax Tree (AST) and generating code directly during parsing. This resulted in a concise compiler, but at the cost of several features, including floating-point numbers and structs. The resulting compiler successfully compiles and runs simple C programs, demonstrating the feasibility of a single-pass approach.
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