- Boost-users - lists.boost.org

Re: [Boost-users] Mismatch and regex newbie problem
by david v 29 Aug '06

29 Aug '06

What's boost_check and what's it got to do with regex? john i found the boost_check in here http://www.boost.org/libs/test/doc/components/test_tools/reference/BOOST_CH… and though it would do what i was trying to do. But i think the the regex_token_iterator you submitted would do it. std::string::const_iterator start = in.begin(); std::string::const_iterator end = in.end(); boost::sregex_token_iterator i(start, end, *regex, -1), j; while(i != j) { cout << *i << endl; }

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Re: [Boost-users] Mismatch and regex newbie problem
by david v 29 Aug '06

29 Aug '06

For example, If the regex to search for is "test" and the string is "tast" , then 1 mismatch is found position 2. John, i think the code below you have submitted is doing exactly what i want right ?? std::string::const_iterator start = in.begin(); std::string::const_iterator end = in.end(); boost::sregex_token_iterator i(start, end, *regex, -1), j; while(i != j) { cout << *i << endl; } >Hello, >I'm using the boost regex library to search short expressions in large >strings. The code below works fine but it almost does what ever i >want. The thing i'm missing and that i'm not sure to handle are the >mismatches. Basically when i look for a regex in a string i want to >have the possibility to get the number of mismatches and their >respective positions. I read through the docs and saw that the >boost_check may do the work. Well the think is that i'm not sure how >to use it with my code and since the boost library is quite complex >it would be great if somebody could help to move forward. > >How can i use the code below to get the mismatches and their >positions with boost_check ??? What's boost_check and what's it got to do with regex? >#####Setting the regex >..... >re = "test"; >boost::regex *regex = new boost::regex(re,boost::regbase::icase); >..... > >#######Getting the matched >....... >std::string::const_iterator start = in.begin(); >std::string::const_iterator end = in.end(); >boost::smatch match; >while >(boost::regex_search(start,end,match,*regex,boost::match_extra)) >{ >cout << match.[0] << endl; >start = match[0].second; >} > >#############Getting the mismatches ??? >How ??? > >Any help would be extemely helpful !!! What do you mean by mismatches? The sections of the string that didn't match? That would be: std::string::const_iterator start = in.begin(); std::string::const_iterator end = in.end(); boost::smatch match; while(boost::regex_search(start,end,match,*regex)) { cout << match.prefix() << endl; start = match[0].second; } // avoid a fencepost error: cout << match.suffix() << endl; Note that the match_extra flag is unnecessary unless you really need to record repeated captures. Normal capture information - of the kind you get from Perl and other regex engines don't need this - and it slows down matching as well as requiring building the lib in a non-default mode. You can also do this rather easier with regex_token_iterator: std::string::const_iterator start = in.begin(); std::string::const_iterator end = in.end(); boost::sregex_token_iterator i(start, end, *regex, -1), j; while(i != j) { cout << *i << endl; } HTH, John.

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Mismatch and regex newbie problem
by david v 29 Aug '06

29 Aug '06

Hello, I'm using the boost regex library to search short expressions in large strings. The code below works fine but it almost does what ever i want. The thing i'm missing and that i'm not sure to handle are the mismatches. Basically when i look for a regex in a string i want to have the possibility to get the number of mismatches and their respective positions. I read through the docs and saw that the boost_check may do the work. Well the think is that i'm not sure how to use it with my code and since the boost library is quite complex it would be great if somebody could help to move forward. How can i use the code below to get the mismatches and their positions with boost_check ??? #####Setting the regex ..... re = "test"; boost::regex *regex = new boost::regex(re,boost::regbase::icase); ..... #######Getting the matched ....... std::string::const_iterator start = in.begin(); std::string::const_iterator end = in.end(); boost::smatch match; while (boost::regex_search(start,end,match,*regex,boost::match_extra)) { cout << match.[0] << endl; start = match[0].second; } #############Getting the mismatches ??? How ??? Any help would be extemely helpful !!! david

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[program_options] passing a negative numer as an option --sorry
by imre＠u-tx.com 29 Aug '06

29 Aug '06

Sorry, it was a configuration problem on my side.

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[preprocessor] Enumerating sequence and shifter sequence
by Roman Perepelitsa 29 Aug '06

29 Aug '06

Hi. I have the following sequence #define SEQ (a)(b)(c)(d) I want to transform it to something like this F(a,b) F(b,c) F(c,d) How can I do it efficiently and elegantly? Thank you in advance. Roman Perepelitsa.

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[program_options] passing a negative numer as an option
by imre＠u-tx.com 29 Aug '06

29 Aug '06

Hi, Is subj. possible (with 1.33)? If yes, then how? If I write attn = "-11" into the config file, then cout << vm["attn"].as<int16_t>(); outputs 11. Thx ImRe

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Jamfile for app using date_time
by Steve Hyatt 29 Aug '06

29 Aug '06

Hi all. I am trying to write a Jamfile for a simple test app which uses the boost date_time library. I am unable to figure out how to tell the boost build system to link in that library. I have a Makefile which can do the link: $make g++ -c -pipe -Wall -Wno-unknown-pragmas -DLINUX -I./ -g -o tester.o tester.cpp g++ -o tester tester.o -lboost_date_time-gcc-1_33_1 Can someone show me a Jamfile that 'just works' (TM). Thanks Steve saphlyx(a)shaw.ca

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Interprocess bug and patch
by Adam Lewis 28 Aug '06

28 Aug '06

Not sure if this is the right place for this bug but I believe it is. The function get_max_num_msg() was returning the incorrect member.

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asio and interprocess fifo
by Koen Deforche 28 Aug '06

28 Aug '06

Hello, For a server-client application, I am experimenting with boost::asio and boost::interprocess -- this is my first intensively boostified project. Since boost::interprocess is work-in-progress, I am using the CVS version. I have found some smaller problems (see at the end of my email), but so far, all works well. I have noticed that in interprocess, an ipc/named_fifo is planned. I was wondering if there will be plans for the asio library to create an asynchronous I/O service for such a fifo ? If not, is this feasible ? I did not find any documentation on how to write a new io_service in the asio documentation ? Regards, koen 1) Timeouts always timed out immediately, which was caused by : interprocess/sync/ptime_to_timespec.hpp line 29: ts.tv_sec = duration.seconds(); should be ts.tv_sec = duration.total_seconds(); 2) Compile problem in interprocess/errors.hpp, which was solved by : interprocess/errors.hpp line 86: void fill_system_message( int system_error, std::string &str) should be inline void fill_system_message( int system_error, std::string &str) (probably the same is true for the BOOST_WINDOWS versino on line 65 ?

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[statechart] No state?
by Johan Nilsson 28 Aug '06

28 Aug '06

Hi, I'm implementing an asynchronous state machine and have problems with events not being dispatched. All event thrown at the fsm are dispatched to the unhandled_event method. When debugging the problem, I used typeid on the event to see that the expected events were generated (they were) from the event dispatch threads. After this, I tried to get the current state from within the unhandled_event() method - but to my surprise the statement "this->state_begin() != this->state_end()" is never satisfied. Looks like there's no current state. What's even more confusing is that this behaviour is only exposed in the application itself. This part of the project is divided into three modules; the application, a static library containing most of the code, and a unit test driver. The test driver and the application links to the library. When running the unit tests, the dispatching works and it is possible to see the current state using the above method. Release or debug mode doesn't matter. RTTI is enabled. Using RC_1_34_0 and VC8. What could possibly expose this behaviour? // Johan

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