PyLox

A Tree-Walk Interpreter to the PyLox language, using the good old python for the simplest and cleanest implementation.

Prerequisites

To run this PyLox interpreter, you will need to have a version of python higher or equal to 3.5 on your system. You can check your installed python3 version, by typing at the command prompt:

$ make check

If any error, or a lower version, please consult the Python documentation to proceed to the Python setup guide.

Running Tests

To run any PyLox script in an interative prompt mode, type:

$ make repl
> ...

Or to interpret a script located at a .plox file, provide the full path to the file:

$ make run <file path>

You can try to run your own PyLox scripts, or any of the scripts located at the "tests" folder in this project.

e.g., to run a single test script, type:

$ make test

Or to consult this guide at any time, type:

$ make help

The Language

PyLox was born from the Lox language, originally designed by Bob Nystrom at the Crafting Interpreters book.

It is a high-level dynamically-typed language, that supports Object-Oriented Programming and have a C-like syntax. This dynamic type feature allows variables to store values of any type at runtime, but operations with operands of different data types are not allowed.

PyLox supports :

* 4 built-in data-types : Numbers, Booleans, Strings and nil,
* Expressions,
* Control Flow statements,
* Print statement,
* While and For Loops,
* Functions,
* Classes,
* Single Inheritance 

*please consult the PyLox Grammar file for more details

To Do

• anonymous functions
• break & continue statements
• exit statement
• delete statement
• getters
• allows to read input from user
• ? allows to work with files
• ? assignments += -= *= /=
• ? static methods
• ? some other built-in data-types or functions ...

Status

Finished Part II - A Tree-Walk Interpreter