Subject: Re: [Boost-users] [spirit] first steps
From: Hartmut Kaiser (hartmut.kaiser_at_[hidden])
Date: 2010-02-18 13:29:01
> > Please provide us with a minimal, self-contained piece of code we can
> > compile. We have no crystal ball to see what you're doing...
>
> Sorry, I was sure it's so basic, that there's even no need for real
> source-code.
Sure it is, but I wanted to see which placeholder do you use, and what
includes you have.
> Here it is:
>
> #include <string>
> #include <boost/spirit/include/qi.hpp>
> #include <boost/spirit/include/phoenix_core.hpp>
> #include <boost/spirit/include/phoenix_operator.hpp>
>
> namespace qi = boost::spirit::qi;
> namespace ascii = boost::spirit::ascii;
> namespace phoenix = boost::phoenix;
> int main()
> {
> using qi::int_;
> using qi::string;
> using qi::_1;
> using ascii::space;
> using phoenix::ref;
>
> int i1;
> std::string s1;
> std::string source;
> std::string::iterator first = source.begin(), last =
> source.end();
> // compiles well:
> qi::phrase_parse(first, last,
> (
> int_[ref(i1) = _1]
> )
> ,
> space);
>
> // doesn't compile:
> qi::phrase_parse(first, last,
> (
> string[ref(s1) = _1]
> )
> ,
> space);
>
> }
qi::string is not a valid parser primitive. What would you expect it to
match anyway? You'll have to be a bit more specific about what kind of
string you need to parse, for instance:
'"' >> ~+char_('"') >> '"'
(i.e. a quote followed by at least one character which is not a quote
followed by a quote).
Regards Hartmut
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