the_heck.cr

macro requires(test)
end

macro ensures(test)
end

module Contract
  macro included
    puts {{ @type.class_name }}
    
    macro method_added(meth)
      \{% puts "Method #{meth.name.stringify} added" %}
      \{{ meth }}
    end
  end
  
  
end

class Foo
  include Contract
    
  requires var > 5
  def foo(var)
    var * 5
  end
end

foo = Foo.new
foo.foo 9