module Opal::Nodes::Closure::NodeSupport

def compile_catcher
  catchers = @closure.catchers
  return if catchers.empty?
  helper :thrower
  catchers_without_eval_return = catchers.grep_v(:eval_return)
  push "} catch($e) {"
  indent do
    catchers.each do |type|
      case type
      when :eval_return
        line "if ($e === Opal.t_eval_return) return $e.$v;"
      else
        line "if ($e === $t_#{type}) return $e.$v;"
      end
    end
    line "throw $e;"
  end
  line "}"
  unless catchers_without_eval_return.empty?
    push " finally {", *catchers_without_eval_return.map { |type| "$t_#{type}.is_orphan = true;" }, "}"
  end
  unshift "return " if closure_is? SEND
  unless catchers_without_eval_return.empty?
    unshift "var ", catchers_without_eval_return.map { |type| "$t_#{type} = $thrower('#{type}')" }.join(", "), "; "
  end
  unshift "try { "
  unless closure_is? JS_FUNCTION
    if scope.await_encountered
      wrap "(await (async function(){", "})())"
    else
      wrap "(function(){", "})()"
    end
  end
end