spry

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spry is a programming language created in 2015 by Göran Krampe.

Source code:

git clone https://github.com/gokr/spry

#691on PLDB

9Years Old

A Smalltalk and Rebol inspired language implemented as an AST interpreter in Nim

spry website
spry is developed on GitHub and has 378 stars
spry first developed in https://sprylang.se/about.html

Example from the web:

# 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]]
  ^result]

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

Example from hello-world:

#48!#65!#6c!#6c!#6f!#20!#57!#6f!#72!#6c!#64!

Feature	Supported	Token	Example
Booleans	✓	True False
Comments	✓		# A comment
Line Comments	✓	#	# A comment
Semantic Indentation	X

Language features