extensionmethods.mirah

package cool.extensions

extension StringExt[String]
  def toInt
    Integer.parseInt(self)
  end
end

# or, less overloaded w/ generics

extension StringExt of String
  def toInt
    Integer.parseInt(self)
  end
end

# or flip it around
extend String with StringExt
  def toInt
    Integer.parseInt(self)
  end
end

# - should it be self, or should we have a different id for the
# extended target?
#
# - if we have an implicit target, should fields be referred to with @ syntax?

usage_1.mirah

package awesome
use_extension cool.extensions.StringExt

puts "123".toInt + 5

usage_2.mirah

package awesome

extensions(cool.extensions.StringExt)

puts "123".toInt + 5

usage_import_style.mirah

package awesome

import extension cool.extensions.StringExt

puts "123".toInt + 5