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

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 elements in the stream.

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

• bison
• flex
• gcc / clang

make

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

Streem is distributed under MIT license.

Copyright (c) 2015 Yukihiro Matsumoto

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.