wren/doc/site/index.markdown

^title Welcome

## 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
    IO.print("Hello, world!")

    class Wren {
      flyTo(city) {
        IO.print("Flying to ", city)
      }
    }

    var adjectives = new Fiber {
      ["small", "clean", "fast"].map {|word| Fiber.yield(word) }
    }

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

 *  **Wren is small.** The codebase is about [5,000 lines][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's written in warning-free
    standard C99.

[syntax]: syntax.html
[src]: https://github.com/munificent/wren/tree/master/src
[nan]: https://github.com/munificent/wren/blob/46c1ba92492e9257aba6418403161072d640cb29/src/wren_value.h#L378-L433
[perf]: performance.html
[classes]: classes.html
[fibers]: fibers.html
[embedding]: embedding-api.html