Simple PL/0 Compiler

This converts PL/0 code to JavaScript via an AST.

The Shunting Yard Algorithm is used for mathematical expressions.

Includes these bits:

• tokenizer
• parser
• emitter (JavaScript)
• shunting yard

Usage

Right now, the PL/0 source is hardcoded in compiler.js. (Obviously that's scheduled to change.)

node compiler > foo.js
node foo.js

Caveats

This isn't the most efficient code, by any means. The tokenizer and emitter constantly make new strings, for example.

TODO

• Accept input filename on command line
• Finish implementing ODD
• ? statment
• Report symbol table-related errors
• Add a C emitter
• Moar testing!

References

• PL/0 at Wikipedia
• Recursive Descent Parsing at Wikipedia
• Shunting Yard Algorithm at Wikipedia
• Write your own (LISP-y) Compiler