lrb

Lispy Ruby

[LRB] transform Ruby to a Lisp with braces, remain all ruby keywords and same funtionalities.

* Install:

gem install lrb

* To Start REPL:

lrb

* for debug mode:

[debug] 

* To compile & run a source file:

lrb test.lrb

* LRB source look like lisp, but with braces:

[require "colorize"]

[def [square x]
  [* x x]
]

[def [factorial acc n]
  [if [< n 1]
    acc
    [factorial [* acc n] [- n 1]]]]


[puts [square 10]]
[puts [factorial 1 10]]


[def [single_exp]
  [puts "only block !"]
]

[def [multiple_exps][
    [puts "1st statement"]
    [puts "2nd statement"]
  ]
]

[single_exp]
[multiple_exps]


[puts [== 1 1]]

[= name :Trung.to_s ]
[puts name]
[puts [+ "Hello " name " \!"]]

[= lst [list 1 2 3]]
[= lst Array.new]
[<< lst 4]
[puts lst.to_s.blue]

[puts [.to_s.blue [+ "Heell" "o"]]]

[do [.map [list 1 2 3]] [n][
    [puts n]
  ]
]

[unless [< 1 0]
  [puts "one is not lesser than zero"]
  [puts "you're doomed."]
]

[= square 
  [lambda [x]
    [* x x]
  ]
]

[puts 
  [.to_s.blue [square.call 2]]]

[def [argumented x=2] 
  [puts x]
]

[argumented]


[cond 
  [< 1 0] [puts "1 < 0"]
  [> 3 4] [puts "3 > 4"]
  [<= 1 0] [puts "1 <= 0"]
  [>= 1 0] [puts "1 >= 0"]
  true    [puts "as always"]
]

* By then, LRB compile down into Ruby:

require "colorize"

def square x
  x * x
end

def factorial acc, n
  if n < 1
    acc
  else
    factorial acc * n, n - 1
  end
end

puts square 10

puts factorial 1, 10

def single_exp 
  puts "only block !"
end

def multiple_exps 
  puts "1st statement"
  puts "2nd statement"
end

single_exp 

multiple_exps 

puts 1 == 1

name = :Trung.to_s

puts name

puts "Hello " + name + " !"

lst = [1, 2, 3]

lst = Array.new

lst << 4

puts lst.to_s.blue

puts ("Heell" + "o").to_s.blue

([1, 2, 3]).map do |n|
  puts n
end

unless 1 < 0
    puts "one is not lesser than zero"
  else
    puts "you're doomed."
  end

square = lambda {|x|
  x * x
}

puts (square.call 2).to_s.blue

def argumented x=2
  puts x
end

argumented 

if 1 < 0
  puts "1 < 0"
elsif 3 > 4
  puts "3 > 4"
elsif 1 <= 0
  puts "1 <= 0"
elsif 1 >= 0
  puts "1 >= 0"
elsif true
  puts "as always"
end

* And evaluate everything:

[evaluated]:
100
3628800
only block !
1st statement
2nd statement
true
Trung
Hello Trung !
[4]
Heello
1
2
3
one is not lesser than zero
4
2
1 >= 0

Currently, it's only experiment toy, not yet support repl or macros.

Have fun !