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lechat
lechat

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I made a scripting language in Rust for fun

#rust #pest #beginners

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

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

$ ./target/release/oran -f ./examples/hello.orn Hello World.
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In this language, you can define functions as follows:

fn test () { println('hello'); } test();
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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
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Of course you can define variables as follows:

fn test () { let test = 'hey'; println(test); } test();
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$ ./target/release/oran -f ./examples/hello.orn hey
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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();
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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();
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You can also use for-loop in this language.

fn test () { let test = ' test'; for i in 0..5 { println(i << test); } } test();
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Result:

$ ./target/release/oran -f ./examples/hello.orn 0 test 1 test 2 test 3 test 4 test
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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();
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Result:

$ ./target/release/oran -f ./examples/hello.orn 0 test 1 test 2 test 3 test 4 test 5 test
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You can also use 'if':

fn test (test1, test2) { return test1 + test2; } if test(5,5) == 10 { println('it is ten!'); }
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Result:

$ ./target/release/oran -f ./examples/hello.orn it is ten!
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Escaping is also implemented:

fn test (test1, test2) { test1 + test2 } let t = 10; if t == test(5,5) { println("variable \"t\" is " << t); }
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Result:

$ ./target/release/oran -f ./examples/hello.orn variable "t" is 10
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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));
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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
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Top comments (2)

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levirs565 profile image
Levi Rizki Saputra •

Great project!

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lechatthecat profile image
lechat •

Thank you very much :)