Another PL/0 language (https://en.wikipedia.org/wiki/PL/0) compiler and debugger that is written in C++.
## Introduction
This code came from my undergrad course project for compiler principles in 2015. The code quality is beyond horrible but it's some of my earliest big projects.
## Architecture
- The compiler uses **SLR(1)** parsing. The grammar is hard-coded in the form of an LR parsing table (`states`) and the FOLLOW set (`follows`) which is initialized in `initStates()` function.
- The compiler was written from the ground up **without any third-party libraries** except the standard C++ library.
- It contains:
- A lexer (`GETSYM()` function) that processes the input into tokens and literals while constructing a symbol table
- A parser (`BLOCK()` function) that uses shift/reduce-parsing to generate the target code (pseudo-assembly)
- An interpreter (`INTERPRET()` function) that executes the pseudo-assembly code.