Problems with lit() with one-character strings

[Kalle Rutanen <ilpoilves@…>]

Hi,

I have a rule in the grammar defined as:

typedef qi::rule<Iterator, std::string(), qi::ascii::space_type> Rule;

Next I would like to define such a rule by:

Rule operation = lit("+") | lit("sum")

However, this will create errors. The problem seems to be the one-character string "+". If it is changed to e.g. "++" then there is no problem. It looks like "+" is interpreted as a single character and not as a string.

[anonymous]

That's by design, use string("+") instead. Regards Hartmut