mcanthony / streem

prototype of stream based programming language

Streem


Streem is a stream based concurrent scripting language. It is based on a programming model similar to the shell, with influences from Ruby, Erlang, and other functional programming languages.

Note: Streem is still in the design stage. It's not working yet. Stay tuned.

Examples

In Streem, a simple cat program looks like this:

stdin | stdout

Streem is a (sort of) DSL for data flows. Above code means building data-flow connection between stdin and stdout. Actual data processing will be done in the event loop invoked after program execution.

For another example, a simple FizzBuzz will look like this:

seq(100) | {x ->
  if x % 15 == 0 {
    "FizzBuzz"
  }
  else if x % 3 == 0 {
    "Fizz"
  }
  else if x % 5 == 0 {
    "Buzz"
  }
  else {
    x
  }
} | stdout

The second part in the pipeline ({x ->...}) is a function object. If a function object is connected in the pipeline, it will be invoked for each element in the stream.

Compiling

Installing dependencies

• bison
• flex
• gcc / clang
• libgc (libgc-dev on Debian/Ubuntu, bdw-gc on OSX homebrew)

Run make

make

Please note that Streem will not run any scripts yet, but you can check parse files and check syntax.

Contributing

Send a pull request to http://github.com/matz/streem. We consider you have granted non-exclusive right to your contributed code under MIT license. Use http://github.com/matz/streem/issues for discussion.

License

MIT license (© 2015 Yukihiro Matsumoto)