ahem/lib/ahem/ast/conditional.rb

class AST::Conditional
  attr_reader :branches

  def initialize(branches)
    @branches = branches
  end

  def ==(other)
    other.is_a?(AST::Conditional) && other.branches == @branches
  end

  def execute(env)
    @branches.each do |branch|
      if branch.condition.execute(env)
        value = nil
        branch.block.statements.each do |statement|
          value = statement.execute(env)
        end

        return value
      end
    end
  end
end