Question

在文件中显然存储了多行正则表达式，由YAML::dump(b1)保存没有问题。

问题，当Syck似乎与多行正则表达式有问题时，如何加载它？

b2 = YAML::load(File.open("browserObj.yaml", 'r'))

Syck::TypeError: Invalid Regular expression: "/\\A\\s*\n        ([a-zA-Z][\\-+.a-zA-Z\\d]*):                           (?# 1: scheme)\n        (?:\n           ((?:[\\-_.!~*'()a-zA-Z\\d;?:@&=+$,]|%[a-fA-F\\d]{2})(?:[\\-_.!~*'()a-zA-Z\\d;\\/?:@&=+$,\\[\\]]|%[a-fA-F\\d]{2})*) \\                   (?# 2: opaque)\n        |\n           (?:(?:\n             \\/\\/(?:\n \\                (?:(?:((?:[\\-_.!~*'()a-zA-Z\\d;:&=+$,]|%[a-fA-F\\d]{2})*)@)? \\       (?# 3: userinfo)\n                   (?:((?:(?:[a-zA-Z0-9\\-.]|%\\h\\h)+|\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}|\\[(?:(?:[a-fA-F\\d]{1,4}:)*(?:[a-fA-F\\d]{1,4}|\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})|(?:(?:[a-fA-F\\d]{1,4}:)*[a-fA-F\\d]{1,4})?::(?:(?:[a-fA-F\\d]{1,4}:)*(?:[a-fA-F\\d]{1,4}|\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}))?)\\]))(?::(\\d*))?))? (?# 4: host, 5: port)\n               |\n                 ((?:[\\-_.!~*'()a-zA-Z\\d$,;:@&=+]|%[a-fA-F\\d]{2})+) \\                (?# 6: registry)\n               )\n             |\n             (?!\\/\\/)) \\                          (?# XXX: '\\/\\/' is the mark for hostport)\n \\            (\\/(?:[\\-_.!~*'()a-zA-Z\\d:@&=+$,]|%[a-fA-F\\d]{2})*(?:;(?:[\\-_.!~*'()a-zA-Z\\d:@&=+$,]|%[a-fA-F\\d]{2})*)*(?:\\/(?:[\\-_.!~*'()a-zA-Z\\d:@&=+$,]|%[a-fA-F\\d]{2})*(?:;(?:[\\-_.!~*'()a-zA-Z\\d:@&=+$,]|%[a-fA-F\\d]{2})*)*)*)? \\                   (?# 7: path)\n           )(?:\\?((?:[\\-_.!~*'()a-zA-Z\\d;\\/?:@&=+$,\\[\\]]|%[a-fA-F\\d]{2})*))? \\                (?# 8: query)\n        )\n        (?:\\#((?:[\\-_.!~*'()a-zA-Z\\d;\\/?:@&=+$,\\[\\]]|%[a-fA-F\\d]{2})*))? \\                 (?# 9: fragment)\n      \\s*\\z/x"
    from /usr/lib/ruby/1.9.1/syck/rubytypes.rb:284:in `yaml_new'
    from /usr/lib/ruby/1.9.1/syck.rb:135:in `transfer'
    from /usr/lib/ruby/1.9.1/syck.rb:135:in `node_import'
    from /usr/lib/ruby/1.9.1/syck.rb:135:in `load'
    from /usr/lib/ruby/1.9.1/syck.rb:135:in `load'
    from /usr/lib/ruby/1.9.1/syck.rb:146:in `block in load_file'
    from /usr/lib/ruby/1.9.1/syck.rb:145:in `open'
    from /usr/lib/ruby/1.9.1/syck.rb:145:in `load_file'
    from (irb):428
    from /usr/bin/irb:12:in `<main>'

我见过关于rubytypes.rb补丁的discussion但其他情况都没有。

我宁愿不转向Psych，因为这会打开另一种蠕虫：

YAML::ENGINE.yamler = "psych"

# attempt to load from file again
TypeError: can't convert Fixnum into String

发生了什么事？有什么希望吗？我没有先前对Syck和Psych的了解，也没有YAML解析的内部知识，直到这个错误使它变得不透明。

Answer 1

您可以将regexp存储为字符串。当您从yaml文件中读回它时，只需将字符串转换回正则表达式。 Regexp.new myregexp_str - 这当然只是一种解决方法。

<强>更新或者你可以做一些非常愚蠢的事情来修补心理来处理多行regexp。由于修补后的方法很长，所以请抓住它here。但这里是对实际修补内容的解释。

module Psych
  module Visitors
    class ToRuby < Psych::Visitors::Visitor
       # ...
      def deserialize
        # ... L75
        when "!ruby/regexp"
        o.value =~ /^\/(.*)\/([mixn]*)$/m # <- notice the added "m" for multiline mode
        # ...
      end
    end
  end
end

使用ruby-1.9.3-p194

Answer 2

对于潜伏的每个人来说，这看起来像一个老虫。我刚刚尝试使用ruby 1.9.3而且我得到了这个： [3] pry(main)> YAML.load(YAML.dump(/asd/m)) => /asd/m

多行正则表达式中的TypeError读数

2 个答案: