module ObjectFramework::Values

# File lib/object_framework/execution.rb, line 19
def self.detach(value, visiting = {})
  composite = value.is_a?(Array) || value.is_a?(Hash) || value.is_a?(Data)
  if composite
    raise UnsafeResult, "Public values cannot contain cycles" if visiting.key?(value.object_id)
    visiting[value.object_id] = true
  end
  case value
  when nil, true, false, Symbol, Integer, Float then value
  when String then value.dup.freeze
  when Array then value.map { |item| detach(item, visiting) }.freeze
  when Hash then value.to_h { |key, item| [detach(key, visiting), detach(item, visiting)] }.freeze
  when Data then value.class.new(**detach(value.to_h, visiting))
  else raise UnsafeResult, "Public results must contain independent values (#{value.class})"
  end
ensure
  visiting.delete(value.object_id) if composite
end

# File lib/object_framework/execution.rb, line 7
def self.mutable_copy(value)
  case value
  when String then value.dup
  when Array then value.map { |item| mutable_copy(item) }
  when Hash then value.to_h { |key, item| [mutable_copy(key), mutable_copy(item)] }
  when Data then value.class.new(**mutable_copy(value.to_h))
  else value
  end
end