想到的最简单的方法是简单地使注释可跳过:

The simplest way that comes to mind is to simply make comments skippable:

bool ok = qi::phrase_parse(
        f,l,
         (
               ("v"  >> qi::double_ >> qi::double_ >> qi::double_) |
               ("vn" >> qi::double_ >> qi::double_ >> qi::double_)
          ) 
          % qi::eol,
        ('#' >> *(qi::char_ - qi::eol) >> qi::eol | qi::blank), b_vertices);

请注意，如果#出现在行内某处，这也会识别"注释.这可能很好(因为它将使解析失败，除非它是在其他有效输入行上尾随的注释).

Note that this also 'recognizes' comments if # appears somewhere inside the line. This is probably just fine (as it would make the parsing fail, unless it was a comment trailing on an otherwise valid input line).

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或者，使用一些凤凰魔法来处理注释行"，就像处理"vn"或"v"行一样.

Alternatively, use some phoenix magic to handle "comment lines" just as you handle a "vn" or "v" line.