In this section, I created a simple JavaScript-based programming language. I wrote this to gain a deeper understanding of how programming languages work, and it was very instructive for me.
- install node js
Check that the node is installed on your system otherwise install it through install-node-js
second download or clone this project via terminal command:
git clone https://github.com/Miladxsar23/Egg-programming-language.gitLike all programming languages, our language follows a certain syntax to perform certain operations.
| Syntax | arguments | Description |
|---|---|---|
| if | (condition, trueCallbak, falseCallback) | The if statement works by checking that if the first argument is true, it calls the second argument, otherwise it calls the third argument. |
| while | (condition, callback) | The while statement works by calling the second argument until the condition is met in the first argument |
| do | (task1, task2, ...) | Uses this expression to sequence mattresses |
| define | (variableName, variableValue) | To define variables, we use the expression that the first argument is defined as the name of the variable and the second argument as the value of that variable. |
| fun | (arg1, arg2, ..., body) | We use it to define a function. The last argument is interpreted as the body of the function and the rest of the arguments are interpreted as function arguments. |
| set | (variableName, variableValue) | Used to change the value of a predefined variable |
Like all languages, our language has a set of internal values called environmental variables, which are interpreted based on their values.
| name | arguments | Description |
|---|---|---|
| array | (value1, value2, ...) | Defines an array |
| length | (string | |
| element | (array, index) | return a value at index in array |
| (arg) | print a arg in console | |
| false | --- | false (boolean value) |
| true | --- | true (boolean value) |
| * | --- | multiplication operation |
| + | --- | sum operation |
| - | --- | mines operation |
| / | --- | division operation |
| > | --- | Comparative operation |
| < | --- | Comparative operation |
| == | --- | Comparative operation |
To write a comment, just use the # sign at the beginning of your sentence, then the whole line will be considered as a comment.
# this is a comment
define(count, 1)
First create a file with the .egg extension and then write your egg program in it : test.egg
do(define(total, 0),
define(count, 1),
while(<(count, 11),
do(define(total, +(total, count)),
define(count, +(count, 1)))),
print(total))
# ouput is 55
In the next step, just run its interpreter, Egg.js, with node and send your program file as input to it :
Be sure to open your terminal along the root of this project
node src/code/Egg.js <path of your egg file>
//example
node src.cide/egg.js test.eggAs I use this for my own projects, I know this might not be the perfect approach for all the projects out there. If you have any ideas, just open an issue and tell me what you think.
If you'd like to contribute, please fork the repository and make changes as you'd like. Pull requests are warmly welcome.
This project is licensed under MIT license.
- email: [email protected]