Re: [Boost-bugs] [Boost C++ Libraries] #12094: Operator > changes attribute type

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #12094: Operator > changes attribute type
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-03-24 21:43:48

#12094: Operator > changes attribute type
  Reporter: mikhail.strelnikov@… | Owner: djowel
      Type: Bugs | Status: reopened
 Milestone: To Be Determined | Component: spirit
   Version: Boost 1.61.0 | Severity: Problem
Resolution: | Keywords:

Comment (by djowel):

 Replying to [comment:8 mikhail.strelnikov@…]:
> About "don't fight":
> {{{
> std::string input = "\\n\\t\\u1234";
> ...
> parse(b, e, *('\\' > (escape_seq | unicode)), ...);
> }}}
> What type of attribute it should return? It can be
 std::vector<boost::variant<esc_ast, unicode_ast>> (where esc_ast and
 unicode_ast are inheriting from x3::position_tagged because you need this)
 or in can be simple std::string. I think you can't tell the attribute type
 just by looking at the rule.

 If esc_ast, unicode_ast can both be a string, then the natural attribute
 would be vector<std::string>. An attribute of std::string is just pushing

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