# Parsing

The parsing functionality is for saving and loading from a custom file format.

The BNF for the custom file format is below.

Terminals are surrounded by `**` to the left and right. (rule)+ means "1 o more".

```
int ::= (0-9)+

item ::= **{** int int int int int int int int **}**

grid ::= int int **{** (item)+ **}**
```

The first two `int`s in the grid `int int **{** (item)+ **}**` always follow the order: `canvasWidth canvasHeight`.

The large number of `int`s in the `item` always follows the order: `x y ex ey r g b a`.