rugaroo

# rbs_inline: enabled

class Greeter
  #: (String) -> void
  def initialize(name)
    @name = name #: String
  end

  #: (Integer) -> Array[String]
  def greet(times)
    (1..times).map { |i| "#{i}. hello, #{@name}" }
  end
end

Greeter.new(ARGV.first || "world").greet(3).each { puts it }

type Greeter struct {
	name String
}

func NewGreeter(name String) *Greeter {
	self := &Greeter{}
	Greeter_Initialize(self, name)
	return self
}

func Greeter_Initialize(self *Greeter, name String) {
	self._Greeter().name = name
}

func Greeter_Greet(self *Greeter, times Integer) *Array[String] {
	return Range_Map[Integer, String]((&Range[Integer]{b: 1, e: times}), func(i Integer) String {
		return (Integer.ToS(i) + ". hello, " + self._Greeter().name)
	})
}

func main() {
	// … prelude setup
	var t1_ String
	if t2_ := Enumerable___First0[*Array[String], String](ARGV); t2_ != nil {
		t1_ = (*t2_)
	} else {
		t1_ = "world"
	}
	for it := range Array_Each[String](Greeter_Greet(NewGreeter(t1_), 3)) {
		Kernel_Puts(rb_main, it)
	}
}

// plus ToS/Inspect forwarders and a class id for the runtime

require "sqlite3"

db = SQLite3::Database.new(":memory:")
db.execute("create table books (title text, year integer)")
db.execute("insert into books values (?, ?)", ["Dune", 1965])
db.execute("insert into books values (?, ?)", ["Neuromancer", 1984])

db.execute("select title, year from books order by year") do |row|
  puts "#{row[0]} (#{row[1]})"
end
puts db.get_first_value("select count(*) from books")

$ rugaroo run books.rb
Dune (1965)
Neuromancer (1984)
2

$ ruby books.rb
Dune (1965)
Neuromancer (1984)
2