The union library provides the Ruby analog of a C union.

gem install union

gem cert --add <(curl -Ls https://raw.githubusercontent.com/djberg96/union/main/certs/djberg96_pub.pem)

require 'union'

Union.new('Human', :name, :age, :height)
h = Union::Human.new

# Only one attribute of the union may be set
h.name = 'Daniel' # => #<struct Union::Human name="Daniel", age=nil>
h.age  = 38       # => #<struct Union::Human name=nil, age=38>

None that I'm aware of. Please report any bugs you find on the project page at on the github project page at https://github.com/djberg96/union.

Artistic-2.0

(C) 2003-2021 Daniel J. Berger All Rights Reserved.

This package is provided "as is" and without any express or implied warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose.

Daniel J. Berger