-- Logy code --
main[Args] -> puts["Hello, World!"];
-- AST --
File(ast => [Rule(def => RuleDef(name => RuleName(id => :main), args => [Var(expr => VarName(id => :Args))]), clauses => Expr(expr => Call(name => RuleName(id => :puts), args => [String(value => "\"Hello, World!\"")])))])
-- Interpreter output --
Hello, World!

if [ -e new_folder/folder]
then
  ...
fi

-- Logy code --
main[Args] -> puts[5 * --1];
-- AST --
File(ast => [Rule(def => RuleDef(name => RuleName(id => :main), args => [Var(expr => VarName(id => :Args))]), clauses => Expr(expr => Call(name => RuleName(id => :puts), args => [BinOp(op => :MULT, a => Integer(value => 5), b => UnaryOp(op => :SUB, a => Integer(value => 1)))])))])
-- Interpreter output --
-5

$ mkdir dir1
$ mkdir dir2
$ touch dir1/foo
$ touch dir1/bar
$ cp -R dir1 dir2
$ ls dir2
dir1/
$ ls dir2/dir1
bar	foo
$

Logy REPL
Rules/constants must be loaded from a file ('include "file"')
Type '-help' to get a list of all REPL commands

wrapper -> puts["Hello, World!"];
Hello, World!
> nil
wrapper -> 10 +
        -> 20;
> 30

cheddar> class Animal(private string: name, private number: age) { }
readline.js:925
            throw err;
            ^

TypeError: sproc is not a function

wrapper -> it_dont_exists;
D:/Logy/parser/visitor.rb:11:in `visit': undefined method `fields' for nil:NilClass (NoMethodError)
        from D:/Logy/interpreter/interpreter.rb:92:in `call'
        from D:/Logy/interpreter/interpreter.rb:106:in `visit_RuleName'
        from D:/Logy/parser/visitor.rb:9:in `visit'
        from D:/Logy/interpreter/interpreter.rb:179:in `visit_Expr'
        from D:/Logy/parser/visitor.rb:9:in `visit'
        from D:/Logy/interpreter/interpreter.rb:92:in `call'
        from logy.rb:62:in `block in <main>'

Logy REPL
Rules/constants must be loaded from a file ('include["file"];')
Type '-help' to get a list of all REPL commands

wrapper -> lol[];
Unknow rule 'lol'
wrapper -> lol;
D:/Logy/parser/visitor.rb:11:in `visit': undefined method `fields' for nil:NilClass (NoMethodError)
        from D:/Logy/interpreter/interpreter.rb:92:in `call'
        from D:/Logy/interpreter/interpreter.rb:106:in `visit_RuleName'
        from D:/Logy/parser/visitor.rb:9:in `visit'
        from D:/Logy/interpreter/interpreter.rb:179:in `visit_Expr'

wrapper -> lol[];
Unknow rule 'lol'
wrapper -> lol;
Unknow rule 'lol'

cheddar> class Goat { init { print "THE GOAT HAS RISEN" } }
cheddar> Goat {}
THE GOAT HAS RISEN

SyntaxError: 'closure' is not a Python term /S

cheddar> class Goat(private string: name) { }
cheddar> Goat {}
Runtime Error: Goat has no matching constructor for `Goat {  }`
Available constructors are:
  Goat { String }
cheddar> Goat { "Downgoat" }

extend String {
    appendGoat() {
        return self + "goat";
    }
}

"asdf".appendGoat() // asdfgoat