List.G4

Antlr4 List project - Transpiler from List to Python3

List Language Definition

The list language supports only two types:

A list can have many elements of different types (integers or others lists)

To create variables do:

a = 1
b = a + 2
c = [1, 2, a]
...

You can print any literal value or variable using the print statement, in the form: print X

List supports only one operation for integers, the sum. To sum two or more integers just do:

1+2+5

List support two different operation over lists:

sum, in the form: [1,2,3] + [1,2,3], that gives you another list [2, 4, 6]
concatenation, in the form: [1,2,3] . [1,2,3], that gives you another list: [1,2,3,1,2,3]

Download and install java compilers
Download and install Python3 interpreter
Download and install ANTLR4. Exists a script named get_antlr.sh to download the tested version of antlr
run pip install -r requirements.txt
thats it!

To run programs in List just do:

python main.py my_list_script.list > output.py

This will create a output.py file that can be run with:

python output.py

If you want to avoid create a new file to run the List script just do:

python main.py my_list_script.list | python