Function or functor calling using sprit boost parser library rule to save values in vector c++

Question

I want to parse this line and storing all hex values in functor <005F> <0061> [<00660066> <00660069> <00660066006C>] this values in txt file and m reading this fill line by line

like 005F 0061 00660066 00660069 00660066006C all values should be in vector but its not working

the spirit rule is to parse this line is

rule<> blanks = *blank_p;
rule<> parse_int = blanks >> "<" >> int_p [AddEntry] >> ">";
rule<> parse_ints = *parse_int ;
rule<> parse_range = *parse_int >>"[" >> blanks >> *parse_int >> "]";

int status = parse (line.c_str(),
*(
     parse_range 
 )
 ).full;

and my functor is this

struct AddEntry
{
    vector<int> list;   
    void operator()( int integer)
    {
        list.push_back(integer);
    }
};

Time to use Spirit V2? Classical has been obsolete for many many years — sehe, May 21 '15 at 06:27
how can i achieve it using V2? any example related that will be appreciated ? — , May 21 '15 at 06:35
pleas check it http://coliru.stacked-crooked.com/a/d8f96cf74663cc86 why both parsing functions are true i want the simple function be false — , May 21 '15 at 10:39

score 2 · Accepted Answer · edited May 23 '17 at 12:14

Here's a sample doing this using Spirit V2

Live On Coliru

#define BOOST_SPIRIT_DEBUG
#include <boost/spirit/include/qi.hpp>
namespace qi  = boost::spirit::qi;

int main() {
    typedef std::string::const_iterator It;
    std::string const line = "<005F> <0061> [<00660066> <00660069> <00660066006C>]";

    It f = line.begin(), l = line.end();

    qi::int_parser<uintmax_t, 16> hex_int;
    qi::rule<It, uintmax_t()> braced_hex = '<' >> hex_int >> '>';
    BOOST_SPIRIT_DEBUG_NODE(braced_hex);

    std::vector<uintmax_t> list;
    bool result = qi::phrase_parse(f, l, *braced_hex >> '[' >> *braced_hex >> ']', qi::space, list);

    if (result) {
        std::cout << "Parse success: " << list.size() << "\n";

        for (auto& v : list)
            std::cout << v << " ";
    }
    else {
        std::cout << "Parse failed\n";
    }

    if (f!=l) {
        std::cout << "Remaining unparsed: '" << std::string(f,l) << "'\n";
    }
}

Output:

Parse success: 5
95 97 6684774 6684777 438093348972

Debug output (if enabled):

<braced_hex>
    <try><005F> <0061> [<0066</try>
    <success> <0061> [<00660066> </success>
    <attributes>[95]</attributes>
</braced_hex>
<braced_hex>
    <try><0061> [<00660066> <</try>
    <success> [<00660066> <006600</success>
    <attributes>[97]</attributes>
</braced_hex>
<braced_hex>
    <try>[<00660066> <0066006</try>
    <fail/>
</braced_hex>
<braced_hex>
    <try><00660066> <00660069</try>
    <success> <00660069> <0066006</success>
    <attributes>[6684774]</attributes>
</braced_hex>
<braced_hex>
    <try><00660069> <00660066</try>
    <success> <00660066006C>]</success>
    <attributes>[6684777]</attributes>
</braced_hex>
<braced_hex>
    <try><00660066006C>]</try>
    <success>]</success>
    <attributes>[438093348972]</attributes>
</braced_hex>
<braced_hex>
    <try>]</try>
    <fail/>
</braced_hex>

Note that on my system int wasn't big enough to hold those numbers, so parse would fail. For maximum range I used intmax_t but you can use other types, including arbitrary precision types:

128 bit string to array using boost::spirit::*

Also note I prefer not to use semantic actions, using automatic attribute propagation. This is really prevalent in Spirit V2. See also

Boost Spirit: "Semantic actions are evil"?

Thank you very much sehe i am learning it and thanks for help :) — , May 21 '15 at 06:53
1>parseer.cpp(21): error C2143: syntax error : missing ',' before ':' 1>parseer.cpp(21): error C2530: 'v' : references must be initialized 1>parseer.cpp(21): error C3531: 'v': a symbol whose type contains 'auto' must have an initializer 1> 1>Build FAILED. — , May 21 '15 at 06:56
Seems your compiler doesn't support c++11 (fully). Change it to c++03: **[Live On Coliru](http://coliru.stacked-crooked.com/a/04561beae116a979)** — sehe, May 21 '15 at 09:19
pleas check it http://coliru.stacked-crooked.com/a/d8f96cf74663cc86 why both parsing functions are true i want the simple function be false — , May 21 '15 at 10:42
sorry check this one [link](http://coliru.stacked-crooked.com/a/b8c35a967de4a609) *other question is when i change the order of both check1 and check2 i got different values :( kindly help me out... — , May 21 '15 at 10:55

Function or functor calling using sprit boost parser library rule to save values in vector c++

1 Answers1

Linked