"""
@def

Macro used to create sections of code that can
be copy/pasted into other code
"""
macro def(name, definition)
  return quote
      macro $(esc(name))()
          esc($(Expr(:quote, definition)))
      end
  end
end

# Example of macro that adds some default fields
@def add_default_fields begin
  name::String
  size::Int
end

# Object that has fields from add_default_fields copy/pasted into it
struct Thing1
  @add_default_fields
end