Gossamer

A garbage-collected, goroutine-powered, fast-compiling systems language with Rust-flavoured syntax and Go-shaped runtime.

Status: pre-stable (version 0.0.0). The public API may change.

Hello, Gossamer

fn main() {
    println("hello, world")
}

Hello, Goroutines and Channels

fn main() {
    let (tx, rx) = channel::<i64>()
    go fn() { tx.send(40 |> add(2)) }()
    println("answer:", rx.recv())
}

Why Gossamer

  • Ergnomic - Forward pipes, Rust like error handling, minimal magic.
  • Efficient - Gossamer runs with minimal impact on memory, and it runs fast.
  • Interpreted and Compiled - Develop code quickly with a bytecode vm powered interpreter and a REPL. Ship an optimized compiled single binary.
  • Go-style goroutines - (go expr) with typed channels.
  • Go-style async - Colorless functions and stackful coroutines.
  • Rust-style type system - statically-typed, generics with trait bounds, pattern-matching, Option<T> / Result<T, E>.
  • Garbage-collected - no lifetimes, no borrow checker surface.
  • Estensible in Rust - Write libraries in a safe systems language

Where to go next

  • Install — build from source today, prebuilt binaries coming with the 1.0.0 release.
  • Running — gos cheat-sheet.
  • Syntax — grammar tour with worked examples.
  • Memory model — how values, references, and the GC fit together.
  • Writing libraries — project.toml, module layout, publishing.
  • Standard library — module index.
  • Prelude — everything available without imports.
  • Toolchain — every subcommand.