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Why does regex_search search to the end of the iterator?
by David McKelvie 23 Mar '05

23 Mar '05

Could anyone explain the following behaviour of regex_search (In /usr/include/boost/regex/v3/regex_match.hpp, so Version 3) Using regex_search acting on a pair of iterators, with input "aaa bbb ccc\naaaaaaX" and regexp "(aaa)|(bbb)|(.)|(\n)" and the match_continuous flag set. It seems that regex_search iterates to the end of the sequence using ++iterator rather than stopping once it has found the first match or even the longest match. Why is this? I guess it is an optimisation to speed up subsequent matches. Is there a way of avoiding this? I have an application in mind where maybe I dont have the entire sequence or rather I'd like the match before I have the complete sequence. thanks, David --- details -- Why does regex_search iterate to the end of the sequence in the following situation, with match_continuous set It seems to me that it could stop as soon as it finds 'aaa' and not iterate further. expression.assign("(aaa)|(bbb)|(.)|(\n)"); // Regular expression const char * input = "aaa bbb ccc\naaaaaaX"; // Input string MyCharIter start = my_begin(input), end = my_end(input); boost::match_results<MyCharIter> what; boost::regex::flag_type flags = boost::match_default | boost::match_not_dot_newline | boost::match_continuous ; regex_search(start,end, what, expression, flags); MyCharIter is just a test iterator on the string with MyCharIter& MyCharIter::operator++(){ // prefix ++X printf("NT: ++X called bp=%d c= '%c'\n",bp,s[bp]); ++bp; return *this; } The output is NT: ++X called bp=0 c= 'a' NT: ++X called bp=1 c= 'a' NT: ++X called bp=2 c= 'a' NT: ++X called bp=0 c= 'a' NT: ++X called bp=1 c= 'a' NT: ++X called bp=2 c= 'a' NT: ++X called bp=3 c= ' ' NT: ++X called bp=4 c= 'b' NT: ++X called bp=5 c= 'b' NT: ++X called bp=6 c= 'b' NT: ++X called bp=7 c= ' ' NT: ++X called bp=8 c= 'c' NT: ++X called bp=9 c= 'c' NT: ++X called bp=10 c= 'c' NT: ++X called bp=11 c= ' ' NT: ++X called bp=12 c= 'a' NT: ++X called bp=13 c= 'a' NT: ++X called bp=14 c= 'a' NT: ++X called bp=15 c= 'a' NT: ++X called bp=16 c= 'a' NT: ++X called bp=17 c= 'a' NT: ++X called bp=18 c= 'X' NT: ++X called bp=0 c= 'a' NT: ++X called bp=0 c= 'a' NT: ++X called bp=1 c= 'a' NT: ++X called bp=2 c= 'a' NT: ++X called bp=0 c= 'a' NT: ++X called bp=0 c= 'a' NT: ++X called bp=1 c= 'a' NT: ++X called bp=2 c= 'a' NT: ++X called bp=0 c= 'a' NT: ++X called bp=1 c= 'a' NT: ++X called bp=2 c= 'a' ******** N = 0 Result = aaa

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compiling error using Boost with VC++ 6
by Samvit Prakash 23 Mar '05

23 Mar '05

Hi, First a confession: I am new to VC++ AND to BOOST...I thought the best way to learn both was to dive right in...and now I'm looking for a life-guard! OK, so here's the problem: I have installed the Boost Library in its default location (C:/Boost... ). When I try to compile the code random_demo.cpp (link to the code: http://www.boost.org/libs/random/random_demo.cpp) I get the following error: "fatal error C1083: Cannot open include file: 'boost/random/linear_congruential.hpp': No such file or directory Error executing cl.exe." Clicking on the error leads me to the following source of error in the code: #include <boost/random/linear_congruential.hpp> I have added the root Boost directory to the directory path: (tools>options>directories > I added C:\Boost there for "include files") So I am not sure why the compiler can't locate the file. Any help would be appreciated. Thanks, samvit

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Using Boost after installation
by Ioannis Vranos 23 Mar '05

23 Mar '05

I installed Boost 1.32 to VS 2003 and MINGW 3.4.2 (got 80 failures for the second), and now I am trying to use it with both but the compiler's can't find the boost header files by their own. For example the source code: #include <boost/static_assert.hpp> int main() { int i=1; BOOST_STATIC_ASSERT(i==1); } produces: C:\c>g++ temp.cpp -o temp.exe temp.cpp:1:35: boost/static_assert.hpp: No such file or directory temp.cpp: In function `int main()': temp.cpp:7: error: `BOOST_STATIC_ASSERT' undeclared (first use this function) temp.cpp:7: error: (Each undeclared identifier is reported only once for each fu nction it appears in.) C:\c>cl /EHsc temp.cpp Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.10.3077 for 80x86 Copyright (C) Microsoft Corporation 1984-2002. All rights reserved. temp.cpp temp.cpp(1) : fatal error C1083: Cannot open include file: 'boost/static_assert. hpp': No such file or directory C:\c> I tried everything I could think like adding the c:\Boost folder and subfolders in PATH environment variable, or explicitly #include the file with its entire path, with no result. What am I missing here? Thanks in advance.

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Re: [Boost-users] [Boost.Test] Link error, need to be pointed in the right direction
by Peter 23 Mar '05

23 Mar '05

Hi Gennadiy, Thanks for replying. Comments following. > * To: boost-users@xxxxxxxxxxxxxxx <mailto:boost-users@DOMAIN.HIDDEN> > * Subject: [Boost-users] Re: [Boost.Test] Link error,need to be pointed in the right direction > * From: "Gennadiy Rozental" <gennadiy.rozental@xxxxxxxxxxx <mailto:gennadiy.rozental@DOMAIN.HIDDEN> > > * Date: Sun, 20 Mar 2005 23:50:50 -0500 > * Organization: Thomson Financial > * References: <A3FB6A3DCF268B47A774EA32AE996CC338E3(a)quantum.Billswan.local <http://lists.boost.org/MailArchives/boost-users/msg10496.php> > > * Reply-to: boost-users@xxxxxxxxxxxxxxx <mailto:boost-users@DOMAIN.HIDDEN> > * Sender: news <news@xxxxxxxxxxxxx <mailto:news@DOMAIN.HIDDEN> > > > ________________________________ > > You need to link with the Unit Test Framework component of Boost.Test > > Compile it (using bjam or you could use project file supplied with library, > VC 2005 will cmvert it to appropriate format automatically) and add to the > list of libraries to link with. > > HTH, > > Gennadiy I knew I had to link it against the Unit Test Framework libraries I just wasn't sure exactly where to stipulate this. I didn't realise that you had included some VC project files as an initial starting point. Anyway I still need some help, I am almost there now .... I can feel it :p. This is what I have done. I have opened up the Version 7.1 project file(s), taking one at random ..\boost_1_32_0\libs\test\build\msvc71_proj\unit_test_example2.vcproj I converted this file to the new format. Looking through all the project settings I found a number of items that you set (or whoever initially setup the projects). The most interesting (disturbing) appears to be where you specify the lib file dependency which is set to "unit_test_framework.lib", looking through the (bjam) compiled lib directory I cannot find a lib file with that name the closest files I have are: ------------------------ D:\Development\boost\lib\dir *unit_test* Volume in drive D is Applications Volume Serial Number is A8BC-D142 Directory of D:\Development\boost\lib 03/03/2005 09:04 PM 1,385,358 libboost_unit_test_framework-vc80-mt-1_32.lib 03/03/2005 09:04 PM 6,076,308 libboost_unit_test_framework-vc80-mt-gd-1_32.lib 03/03/2005 09:04 PM 6,076,308 libboost_unit_test_framework-vc80-mt-gd.lib 03/03/2005 09:04 PM 1,936,966 libboost_unit_test_framework-vc80-mt-s-1_32.lib 03/03/2005 09:04 PM 1,936,966 libboost_unit_test_framework-vc80-mt-s.lib 03/03/2005 09:04 PM 6,957,836 libboost_unit_test_framework-vc80-mt-sgd-1_32.lib 03/03/2005 09:04 PM 6,957,836 libboost_unit_test_framework-vc80-mt-sgd.lib 03/03/2005 09:04 PM 1,385,358 libboost_unit_test_framework-vc80-mt.lib 03/03/2005 09:04 PM 1,936,678 libboost_unit_test_framework-vc80-s-1_32.lib 03/03/2005 09:04 PM 1,936,678 libboost_unit_test_framework-vc80-s.lib 03/03/2005 09:04 PM 4,495,796 libboost_unit_test_framework-vc80-sgd-1_32.lib 03/03/2005 09:04 PM 4,495,796 libboost_unit_test_framework-vc80-sgd.lib 12 File(s) 45,577,884 bytes 0 Dir(s) 297,679,298,560 bytes free ------------------------ Now I am guess I need to change that lib file to one of these. Going through the project settings I have Multi-Threading on and it is obviously in debug mode. Looking at the bottom of this page: http://www.boost.org/more/getting_started.html it describes what each of the parts of the file name means (so I need mt, g and d). Based on this information I chose: libboost_unit_test_framework-vc80-mt-gd.lib This appears to work. Is this correct? Or have a managed to add 2 + 2 and get 5? As a slight aside the IDE does not display the output of the Unit test. Was it supposed to? I was under the impression that it should have. One minor think that I think I found. Looking within the jamfile ..\boost_1_32_0\libs\test\build\Jamfile. I think that it is saying that it needs a lib file named boost_unit_test_framework. I don't know if this is or isnt the case (I have never used bjam before compiling boost), I just thought I would mention it just in case that it is wrong as well. Enough rambling from me now. Thanks for reading through this and I appreciate any help anyone can provide. Peter.

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Serialization library
by Przemyslaw Sliwa 23 Mar '05

23 Mar '05

I have suggestion for further development of the Serialization library. VC++ does not recognise if the project has the generation of the RTTI enabled or not. It took me 2 hours to figure out where is the problem in my program until I have used the what() member in the std::exception. It could be avoided if a simple macro is added. Additionally I do not know where the exception xml_archive_exception is defined. I have found a documentation on the website of the developer who created the library but I cannot figure out in which header it is defined. Thanks a lot for help, Pshemek -- This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden.

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Re: [Boost-users] compiling error using Boost with VC++ 6
by Peter 23 Mar '05

23 Mar '05

Hi, I am not sure if this is of any use to you but you can get the free version of the microsoft compiler and linker of Visual C++ 2003. This is exactly the same as the version shipped with the shrink wrapped product. Check this link out: http://msdn.microsoft.com/visualc/vctoolkit2003/ Note: Read the EULA first I dont know what restrictions they put on the toolkit. Also this does not come with an IDE but there are various free IDE's out there that you could setup to use the Microsoft compiler. Hope this helps. Peter. ---- Samvit Prakash <samvit(a)math.umd.edu> wrote: > > Yes, it's the latest version of boost (1.32). I don't have access to VC7 > as the firm for which I am interning doesn't have that. So I just have to > make do with VC6. > > > At Tuesday 2005-03-22 14:39, you wrote: > >>Hi, > >> > >>First a confession: I am new to VC++ AND to BOOST...I thought the best > >> way > >>to learn both was to dive right in...and now I'm looking for a > >> life-guard! > > > > what version of boost (the latest is 1.32)? > > and get a newer compiler 6 was released before the standard for C++ was > > even approved!!! > > > > > > > >>OK, so here's the problem: I have installed the Boost Library in its > >>default location (C:/Boost... ). > >> > >>When I try to compile the code random_demo.cpp (link to the code: > >>http://www.boost.org/libs/random/random_demo.cpp) I get the following > >>error: > >> > >>"fatal error C1083: Cannot open include file: > >>'boost/random/linear_congruential.hpp': No such file or directory > >>Error executing cl.exe." > >> > >>Clicking on the error leads me to the following source of error in the > >> code: > >>#include <boost/random/linear_congruential.hpp> > >> > >>I have added the root Boost directory to the directory path: > >>(tools>options>directories > I added C:\Boost there for "include files") > >>So I am not sure why the compiler can't locate the file. > >> > >>Any help would be appreciated. > >> > >>Thanks, > >>samvit > >> > >>_______________________________________________ > >>Boost-users mailing list > >>Boost-users(a)lists.boost.org > >>http://lists.boost.org/mailman/listinfo.cgi/boost-users > > > > Victor A. Wagner Jr. http://rudbek.com > > The five most dangerous words in the English language: > > "There oughta be a law" > > > > _______________________________________________ > > Boost-users mailing list > > Boost-users(a)lists.boost.org > > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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Re: [shared_ptr] get_deleter is for what?
by Mark Holloway 23 Mar '05

23 Mar '05

Peter Dimov Wrote: >This problem should be fixed in the latest CVS version of boost::shared_ptr. >If you can try it and report back, it would be much appreciated. Building with the latest CVS shared_ptr files has resolved the problem. Thanks, Mark

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boost::filesystem - no create_file or create_tmp_file?
by Oliver Kowalke 23 Mar '05

23 Mar '05

Hi, I'm using boost-1.32 and I didn't find a function which creates an empty file or an empty temporary file?! thx, Oliver -- "Happy ProMail" bis 24. M�rz: http://www.gmx.net/de/go/promail Zum 6. Geburtstag gibt's GMX ProMail jetzt 66 Tage kostenlos!

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gcc stlport or libstd++ with boost?
by will＠phototropia.org 23 Mar '05

23 Mar '05

Friends: I am new to boost. I was planning on using stlport for its debugging. However, I now realize that much of the info. I have read on libstd++ is dated. Using gcc 3.3 it seems like boost is better suited to libstd++(based on reading regression tests, and mail threads). Are most who use gcc and a lot of boost using libstd++ over stlport(these days)? thanks, Will

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how to call a function of n scalars from a function of vector pointer
by BoschianPest, Stefano 23 Mar '05

23 Mar '05

Hi everybody. Is there a way to call a function of n arguments of type T as a function of vector<T>? In code: I have defined the function: void my_function(int dummy, T a_1, T a_2, ... T a_n) {...} Now I would like to call the function with a pointer ptr void (*ptr) (int, std::vector<T>) (or with a boost::function ptr). Regards Stefano This e-mail and any files transmitted with it are confidential and are intended solely for the use of the individual or entity to whom they are addressed. This communication represents the originator's personal views and opinions, which do not necessarily reflect those of Banca Caboto s.p.a. London Branch. If you are not the original recipient or the person responsible for delivering the email to the intended recipient, be advised that you have received this email in error, and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited. Banca Caboto s.p.a. London Branch is regulated by the Financial Services Authority for the conduct of designated investment business in the UK. If you received this email in error, please immediately notify postmaster(a)cabotouk.com

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