ruby – Rescue NameError但不是NoMethodError

我需要在特殊情况下捕获NameError.但我不想捕获NameError的所有SubClasses.有没有办法实现这个目标？

# This shall be catched
begin
  String::NotExistend.new
rescue NameError
  puts 'Will do something with this error'
end

# This shall not be catched
begin
  # Will raise a NoMethodError but I don't want this Error to be catched
  String.myattribute = 'value'
rescue NameError
  puts 'Should never be called'
end

解决方法

如果异常的类与给定的不同,则可以重新引发异常：

begin
  # your code goes here
rescue NameError => exception
  # note that `exception.kind_of?` will not work as expected here
  raise unless exception.class.eql?(NameError)

  # handle `NameError` exception here
end