samuvale95 / logo-interpreter

Logo Parser and Interpreter

What is Logo programming language?

Here is a definition from wikipedia:

A general-purpose language, Logo is widely known for its use of turtle graphics, in which commands for movement and drawing produced line or vector graphics, either on screen or with a small robot termed a turtle. The language was conceived to teach concepts of programming related to Lisp and only later to enable what Papert called "body-syntonic", where students could understand, predict, and reason about the turtle's motion by imagining what they would do if they were the turtle.

What is the aim of this project?

The aim of the project was create a real parser and interpreter of a programming language, in this particular case what I made was a transpiler. A transpiler is a piece of code that take another source code in input and the output is an equivalente source code in the same language or a different programming language. In this case I parse a Logo code and translate that in a equivalent Python code and run a code over a Python interpreter.

How the project work?

The project is made by 2 component:

• parse.py, this code read a Logo grammar from a .txt file and create the parsed tree that will be use to interpreter to translate Logo command into Python command.
• interpreter.py, this code define all possibile Logo operation and convert that into Python code. To execute Logo graphic operation I use turtle library that allow to execute Logo graphic operation to the screen.

For all project in the docs folder there is complete documentation for all code.

How to use it?

One of the main components project is the Liblet library, develop by prof. Massimo Santini for his course. For a correct execution and installation of this project refer to Liblet documentation.

1. Clone this repository
2. run pip install -r requirements.txt
3. run test.py to check if all code work correctly.