CodeTools::AST << {
BlockArgument < Node { node_type blkarg field body bytecode: |g| { self.body.bytecode(g) done_label = g.new_label g.dup g.is_nil g.goto_if_true(done_label) g.push_cpath_top; g.find_const(:Proc) g.swap g.send(:__from_block__, 1) done_label.set! } }
}