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https://github.com/wren-lang/wren

The Wren Programming Language. Wren is a small, fast, class-based concurrent scripting language.
https://github.com/wren-lang/wren

bytecode c fibers interpreter language scripting-languages wren

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The Wren Programming Language. Wren is a small, fast, class-based concurrent scripting language.

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## Wren is a small, fast, class-based concurrent scripting language



Think Smalltalk in a Lua-sized package with a dash of Erlang and wrapped up in

a familiar, modern [syntax][].



```dart

System.print("Hello, world!")



class Wren {

  flyTo(city) {

    System.print("Flying to %(city)")

  }

}



var adjectives = Fiber.new {

  ["small", "clean", "fast"].each {|word| Fiber.yield(word) }

}



while (!adjectives.isDone) System.print(adjectives.call())

```



 *  **Wren is small.** The VM implementation is under [4,000 semicolons][src].

    You can skim the whole thing in an afternoon. It's *small*, but not

    *dense*. It is readable and [lovingly-commented][nan].



 *  **Wren is fast.** A fast single-pass compiler to tight bytecode, and a

    compact object representation help Wren [compete with other dynamic

    languages][perf].



 *  **Wren is class-based.** There are lots of scripting languages out there,

    but many have unusual or non-existent object models. Wren places

    [classes][] front and center.



 *  **Wren is concurrent.** Lightweight [fibers][] are core to the execution

    model and let you organize your program into an army of communicating

    coroutines.



 *  **Wren is a scripting language.** Wren is intended for embedding in

    applications. It has no dependencies, a small standard library,

    and [an easy-to-use C API][embedding]. It compiles cleanly as C99, C++98

    or anything later.



If you like the sound of this, [let's get started][started]. You can even try

it [in your browser][browser]! Excited? Well, come on and [get

involved][contribute]!



[![Build Status](https://travis-ci.org/wren-lang/wren.svg?branch=main)](https://travis-ci.org/wren-lang/wren)



[syntax]: http://wren.io/syntax.html

[src]: https://github.com/wren-lang/wren/tree/main/src

[nan]: https://github.com/wren-lang/wren/blob/93dac9132773c5bc0bbe92df5ccbff14da9d25a6/src/vm/wren_value.h#L486-L541

[perf]: http://wren.io/performance.html

[classes]: http://wren.io/classes.html

[fibers]: http://wren.io/concurrency.html

[embedding]: http://wren.io/embedding/

[started]: http://wren.io/getting-started.html

[browser]: http://ppvk.github.io/wren-nest/

[contribute]: http://wren.io/contributing.html