gistfile1.txt

def with_model(m, &block)
  w = Object.new
  w.define_singleton_method :model do
    m
  end
  w.instance_eval &block
end

def property(name)
  puts model.to_s + name.to_s
end

with_model :foo do
  property :bar  # want "foobar"
  property :baz  # want "foobaz"
  # ... many `property` invocations
end