class Dentaku::AST::All

def value(context = {})
  collection      = Array(@args[0].value(context))
  item_identifier = @args[1].identifier
  expression      = @args[2]
  collection.all? do |item_value|
    expression.value(
      context.merge(
        FlatHash.from_hash_with_intermediates(item_identifier => item_value)
      )
    )
  end
end