https://github.com/robjsliwa/rlox

rlox language
https://github.com/robjsliwa/rlox

compiler interpreter rust tree-walk-interpreter

Last synced: 15 days ago
JSON representation

rlox language

• Host: GitHub
• URL: https://github.com/robjsliwa/rlox
• Owner: robjsliwa
• License: mit
• Created: 2020-08-27T00:47:15.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2021-03-08T19:13:55.000Z (almost 4 years ago)
• Last Synced: 2024-11-22T23:26:16.967Z (3 months ago)
• Topics: compiler, interpreter, rust, tree-walk-interpreter
• Language: Rust
• Homepage:
• Size: 165 KB
• Stars: 2
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# Rlox

Rlox is simple language designed purely to learn how build interpreters.

Rlox is a clone of lox langauge from https://craftinginterpreters.com/ book. Lox was written in Java and C and Rlox is a clone written in Rust just for fun.

*NOTE* - This is work in progress.  Branch `tree-walk` contains tree walking interpreter.

# Running REPL

Currently REPL it is very basic but you can execute all of the commands from it.  To run REPL just `cargo run`

# Running Rlox code from file

`cargo run -- -i path/filename.rl`

# Run tests

`cargo t`

# Some example code

## Compute Fibonacci 

```

fun fib(n) {

  if (n <= 1) return n;

  return fib(n - 2) + fib(n - 1);

}

for (var i = 0; i < 20; i = i + 1) {

  print fib(i);

}

```

## Closures

```

var a = "global";

{

  fun showA() {

    print a;

  }

  showA();

  var a = "block";

  showA();

}

fun test() {

  print a;

  a=a+"!";

  return a;

}

print test();

```

## Classes and Inheritance

```

class Doughnut {

  cook() {

    return "Fry until golden brown.";

  }

  cookAnother() {

    return "Fry until golden.";

  }

}

class BostonCream < Doughnut {

  cookAnother() {

    var orig = super.cookAnother();

    return orig + " Then pipe full of custard and coat with chocolate.";

  }

}

var first = BostonCream().cook();

print first;

var second = BostonCream().cookAnother();

print second;

```