On Fri, Sep 25, 2009 at 1:41 PM, OvermindDL1 <overminddl1@gmail.com> wrote:

On Fri, Sep 25, 2009 at 1:21 PM, Christian Henning <chhenning@gmail.com> wrote:

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Hi there, I really liked the assign_a actor in classic spirit. Is there something like that in spirit 2.1, aka, spirit::qi?

That is because something like assign_a is worthless in QI.

For example (from the docs), in Spirit.Classic:    int i, j;    std::string s;    r = int_p[assign_a(i)] >> (+alpha_p)[assign_a(s)] >> int_p[assign_a(j,i)];

Can be done in Spirit.QI by:    int i, j;    std::string s;    r = int_[ref(i)=_1] >>(+alpha)[ref(s)=_1] >> int_[ref(j)=_1];

Or even better, this will do the same thing, but will execute even faster:    int i, j;    std::string s;    std::string str("123456 Hello 789");    phrase_parse(str.begin(), str.end(), int_ >> +alpha >> int_, blank, i,s,j); // This will stuff 12345 into i, "Hello" into S, and 789 into j, *very* fast.

Spirit2.1 is *so* much better, as you might be seeing.  :)

Also, I just noticed this is not on the Spirit mailing list. You should post Spirit related questions to the Spirit mailing list, will get more and faster responses.

On Fri, Sep 25, 2009 at 1:58 PM, Christian Henning <chhenning@gmail.com> wrote:

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Also, I just noticed this is not on the Spirit mailing list.  You should post Spirit related questions to the Spirit mailing list, will get more and faster responses.

Response time was very good. ;-)

That is because I happened to be perusing both lists at the time, that is not that common. :) On Fri, Sep 25, 2009 at 1:57 PM, Christian Henning <chhenning@gmail.com> wrote:

Thanks for the quick reply. This looks very interesting. But the following snippets bombs on my machine using VS2005.

#include <boost\algorithm\string.hpp> #include <boost\spirit\include\qi.hpp>

namespace qi = boost::spirit::qi; namespace ascii = boost::spirit::qi::ascii;

int _tmain(int argc, _TCHAR* argv[]) { std::string number( "123" );

int i; qi::parse( number.begin() , number.end() , qi::int_ , ascii::blank , i );

return 0; }

I compiled your example in Visual Studio 2005, and got these errors: 1>s:\tmp\testing\parser\spirit_testing\main.cpp(5) : error C2039: 'ascii' : is not a member of 'boost::spirit::qi' 1>s:\tmp\testing\parser\spirit_testing\main.cpp(5) : error C2878: 'ascii' : a namespace or class of this name does not exist 1>s:\tmp\testing\parser\spirit_testing\main.cpp(7) : error C2061: syntax error : identifier '_TCHAR' 1>s:\tmp\testing\parser\spirit_testing\main.cpp(15) : error C2653: 'ascii' : is not a class or namespace name 1>s:\tmp\testing\parser\spirit_testing\main.cpp(16) : error C2065: 'blank' : undeclared identifier First of all, ascii is not in qi, it is in spirit, so I fix that and change your _TCHAR to just char and _tmain to just main (you are not including windows.h after all) and change parse to phrase_parse (since you are using a skipper, use just parse if you are not using a skipper, basically do like my above example shown) and it compiles and runs fine here and does stuff i with 123. This was the fixed code: #include <boost\algorithm\string.hpp> #include <boost\spirit\include\qi.hpp> namespace qi = boost::spirit::qi; namespace ascii = boost::spirit::ascii; int _tmain(int argc, char* argv[]) { std::string number( "123" ); int i; qi::phrase_parse( number.begin() , number.end() , qi::int_ , ascii::blank , i ); return 0; }

AMDG Christian Henning wrote:

Thanks for the quick reply. This looks very interesting. But the following snippets bombs on my machine using VS2005.

#include <boost\algorithm\string.hpp> #include <boost\spirit\include\qi.hpp>

namespace qi = boost::spirit::qi; namespace ascii = boost::spirit::qi::ascii;

int _tmain(int argc, _TCHAR* argv[]) { std::string number( "123" );

int i; qi::parse( number.begin() , number.end() , qi::int_ , ascii::blank , i );

return 0; }

Try using phrase_parse instead of parse. In Christ, Steven Watanabe

Hi guys, sorry for the late reply. Small vacation. Just changing my code to use phrase_parse fixes my problems. Pretty cool feature in my opinion. But shouldn't it be "parse_phrase" instead of "phrase_parse"? BTW, is the traffic on spirit mailing list enormous? If not, why not have it all on the boost-user list? Thanks for your help, Christian