Your Web News in One Place

An Interest In:

Web News this Week

Search Archive

Some of Our Sources

View All Sources

Help Webnuz

Referal links:

Sign up for GreenGeeks web hosting
November 4, 2020 08:48 am GMT

I made a scripting language in Rust for fun

I wouldn't say my code is beautiful but you can see all the code in the github repository.
https://github.com/lechatthecat/oran

I made a scripting language in Rust. You can try this language by

$ git clone https://github.com/lechatthecat/oran.git$ cd oran$ cargo build --release$ ./target/release/oran -f ./examples/hello.orn
Enter fullscreen mode Exit fullscreen mode

Please note that you need to install Rust in your PC beforehand.

Then you can see 'Hello World' is printed as follows:

$ ./target/release/oran -f  ./examples/hello.orn Hello World.
Enter fullscreen mode Exit fullscreen mode

In this language, you can define functions as follows:

fn test () {    println('hello');}test();
Enter fullscreen mode Exit fullscreen mode

You can copy-and-paste the above in ./examples/hello.orn and run it. If you run this script, you can see the function is called as follows:

$ ./target/release/oran -f  ./examples/hello.orn hello
Enter fullscreen mode Exit fullscreen mode

Of course you can define variables as follows:

fn test () {    let test = 'hey';    println(test);}test();
Enter fullscreen mode Exit fullscreen mode 
$ ./target/release/oran -f  ./examples/hello.orn hey
Enter fullscreen mode Exit fullscreen mode

But variables are immutable by default. You can't substitute other values to the variable.

fn test () {    let test = 'hey';    test = 'hello'; // error!    println(test);}test();
Enter fullscreen mode Exit fullscreen mode

You must define it as a mutable variable to substitute other values:

fn test () {    let mut test = 'hey';    test = 'hello'; // Now it runs    println(test);}test();
Enter fullscreen mode Exit fullscreen mode

You can also use for-loop in this language.

fn test () {    let test = ' test';    for i in 0..5 {        println(i << test);    }}test();
Enter fullscreen mode Exit fullscreen mode

Result:

$ ./target/release/oran -f  ./examples/hello.orn 0 test1 test2 test3 test4 test
Enter fullscreen mode Exit fullscreen mode

If you want to do inclusive for-loop, you can write as follows:

fn test () {    let test = ' test';    for i in 0..=5 {        println(i << test);    }}test();
Enter fullscreen mode Exit fullscreen mode

Result:

$ ./target/release/oran -f  ./examples/hello.orn 0 test1 test2 test3 test4 test5 test
Enter fullscreen mode Exit fullscreen mode

You can also use 'if':

fn test (test1, test2) {    return test1 + test2;}if test(5,5) == 10 {   println('it is ten!');}
Enter fullscreen mode Exit fullscreen mode

Result:

$ ./target/release/oran -f  ./examples/hello.ornit is ten!
Enter fullscreen mode Exit fullscreen mode

Escaping is also implemented:

fn test (test1, test2) {    test1 + test2}let t = 10;if t == test(5,5) {   println("variable \"t\" is " << t);}
Enter fullscreen mode Exit fullscreen mode

Result:

$ ./target/release/oran -f  ./examples/hello.orn variable "t" is 10
Enter fullscreen mode Exit fullscreen mode

Also, as you could see, you can omit 'return' in function just like in Rust:

/*  both functions work  */fn test (test1, test2) {    test1 + test2}fn test2 (test1, test2) {    return test1 * test2;}println(test(5,5));println(test2(5,5));
Enter fullscreen mode Exit fullscreen mode

You can see many other random dirty examples in
https://github.com/lechatthecat/oran/blob/master/examples/example.orn
You can run it by:

$ ./target/release/oran -f  ./examples/example.orn
Enter fullscreen mode Exit fullscreen mode

Original Link: https://dev.to/lechatthecat/i-made-a-scripting-language-in-rust-for-fun-4o2j

Share this article:    Share on Facebook
View Full Article

Dev To

An online community for sharing and discovering great ideas, having debates, and making friends

More About this Source Visit Dev To