boost spirit extracting first word and store it in a vector

Question

I have problems with Boost.Spirit parsing a string.

The string looks like

name1 has this and that.\n 
name 2 has this and that.\n 
na me has this and that.\n 

and I have to extract the names. The text "has this and that" is always the same but the name can consist of spaces therefore I can't use graph_p.

1) How do I parse such a string?

Since the string has several lines of that format I have to store the names in a vector.

I used something like

std::string name;
rule<> r = *graph_p[append(name)];

for saving one name but

2) what's the best way to save several names in a vector?

Thanks in advance

Konrad

Answer 1

I think this will do the trick:

vector<string> names;
string name;
parse(str,
    *(  
       (*(anychar_p - "has this and that.")) [assign_a(name)]
       >> "has this and that.\n") [push_back_a(names, name)]
     ))

Answer 2

If you use the newer Spirit V2.x (which is the default since Boost V1.42), this is as easy as:

#include <boost/spirit/include/qi.hpp>

namespace qi = boost::spirit::qi;

std::vector<std::string> names;
std::string input = "name1 has this and that.\n"
                    "name 2 has this and that.\n"
                    "na me has this and that.\n";
bool result = qi::parse(
    input.begin(), input.end(),
    *(*(qi::char_ - " has this and that.\n") >> " has this and that.\n"),
    names
);

After which, if result is true, the vector names will hold all parsed names (tested with Boost V1.45).