Welcome to Spry! #

Spry is a programming language primarily inspired by Smalltalk/Rebol/Lisp/JavaScript/Forth and Nim.

Spry borrows homoiconicity from Rebol and Lisp, free form syntax from Forth and Rebol, the word of different types from Rebol, good data structure literal support from JavaScript and the general coding experience and style from Smalltalk. It also has a few ideas of its own, like an interesting argument passing mechanism and a relatively novel take on OO.

Mandatory bullet list trying to get you interested:

The reference implementation of Spry is in Nim, however one idea of Spry is to keep the interpreter simple so that it can be ported to other eco systems, like for example C# or Java. The simple implementation also means Spry is "slow as CPython", but the idea is to easily be able to drop down to Nim for primitive functions in C/C++ speeds where needed. The Spry interpreter is also highly modular and easy to extend further.

Taste it #

# Let's add a method to:do: that works as in Smalltalk.
# Methods take the first argument, the "receiver", from the left
# and binds it to "self".
'to:do: = method [:to :block
  n = self
  [n <= to] whileTrue: [
    do block n
    ..n = (n + 1)]]

# Then we can loop in Smalltalk style echoing 1 to 5!
1 to: 5 do: [echo :x]

# We can similarly implement select: from Smalltalk
'select: = method [:pred
  result = ([] clone)
  self reset
  [self end?] whileFalse: [
    n = (self next)
    do pred n then: [result add: n]]

# Then use it to produce [3 4]
echo ([1 2 3 4] select: [:x > 2])

Vision of Spry #

The future vision of Spry is to support 100% live coding in a Smalltalk style immersive environment with advanced tools, but being much more integrated with the various eco systems outside of Spry. Think Smalltalk, but distilled to the core and without the island isolation.

I also wish to explore the live image model in a distributed multi user scenario by using modern database, cloud and networking technology. Yeah, not entirely super clear but if you know about GemStone/S, try visualize that on a global cloud scale, although simplified in architecture.

Join for the fun!