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Boost regex/ICU link problems on linux
by Gary M Ciany 30 Mar '07

30 Mar '07

I am having a problem getting the boost regex icu example code to link on linux. I am on Redhat Linux 9, using gcc 3.4.4. I downloaded the src ICU package and built and installed it as root in /usr/local with no problem. I downloaded boost_1_33_1 and got it to build and install with no problem. I first did a configure telling it where my ICU was located. As it built it stated it was being built with ICU in /usr/local/include. So now I got to build the regex/example code. There is a program under snippets/icu_example.cpp. I went into that example and forced the code to compile the main using the icu. By that I mean I took out the #ifdef BOOST_HAS_ICU and deleted the code around the main that printed "<NOTE>ICU support not enabled..." The code compiles, but when it goes to link I get all these unresolved external references..e.g. ../../../bin/boost/libs/regex/example/icu_example.test/gcc/debug/threading-multi/icu_example.0(.text+0x3e9): In function 'extract_greek(icu_3_6::UnicodeString const&)': snippets/icu_example.cpp:61 undefined reference to icu_3_6::UnicodeString::UnicodeString(unsigned short const*, int)' I get other cases where for example.. ../boost_1_33_1/boost/regex/icu.hpp:1001: Undefined reference to 'icu_3_6::UnicodeString::UnicodeString()' (It seems that maybe the prefix icu_3_6 is being added in the class resolution when creating this .o but was not used in the creation of the .a boost/icu libraries. ) Any idea how to fix this? Gary

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[lambda] logical operators related errors
by Dizzy 30 Mar '07

30 Mar '07

Hello I have the following testcase: #include <string> #include <iostream> #include <boost/lambda/lambda.hpp> #include <boost/bind.hpp> #include <boost/mem_fn.hpp> struct A { std::string s1, s2, s3; A(std::string const& s1_, std::string const& s2_, std::string const& s3_) :s1(s1_), s2(s2_), s3(s3_) {} }; void eval(bool val) { std::cout << "result: " << val << std::endl; } int main() { using boost::bind; using boost::mem_fn; A a1("str1", "str2", "str3"); A a2("str2", "str1", "str3"); eval(((bind(&A::s1, _1) < bind(&A::s1, _2)) && (bind(&A::s2, _1) < bind(&A::s2, _2)))(a1, a2)); } This errors compiling about operator&& no match found. I am trying to write a binary predicate (for a sort type algorithm) that should lexicographically compare the s1 field of the first argument with the corresponding one in the second argument, then compare the s2 fields similary (in this order). It does seem to work for the simpler case of just one "<" operation but doesn't seem to work when using "&&" on the results of "<". I was hoping there is an overloaded && that works on the functors returned by the overloaded < version. Can someone offer a working solution (possibly better looking than this one heh). Thanks! PS: For didactic reasons I specifically do not want to write the comparator manually but using lambda/bind composition and the like -- Mihai RUSU Email: dizzy(a)roedu.net GPG : http://dizzy.roedu.net/dizzy-gpg.txt WWW: http://dizzy.roedu.net "Linux is obsolete" -- AST

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Re: [Boost-users] about static lib of boost::regex
by llwaeva＠21cn.com 30 Mar '07

30 Mar '07

>Hi there, > I am writing a DLL under Windows with MSVC 2005. In my project, >boost:regex is involved. I do nothing but include the following in my >stdafx.h I try to compile the project with OPTION /MD,; however, the compile report that libboost_regex-vc80-mt-s-1_33_1.lib cannot be found. It fails to compile the project even I specify the path and library while compiling. What's going on? Thanks again.

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about static lib of boost::regex
by llwaeva＠21cn.com 30 Mar '07

30 Mar '07

Hi there, I am writing a DLL under Windows with MSVC 2005. In my project, boost:regex is involved. I do nothing but include the following in my stdafx.h #include <boost/regex.hpp> #include <boost/regex/v4/match_flags.hpp> #include <boost/scoped_ptr.hpp> #include <boost/compressed_pair.hpp> #include <boost/format.hpp> #include <boost/algorithm/string/regex.hpp> #include <boost/algorithm/string/regex_find_format.hpp> #include <boost/algorithm/string/replace.hpp> #include <boost/algorithm/string/split.hpp> #include <boost/algorithm/string.hpp> #include <boost/algorithm/string_regex.hpp> #include <boost/algorithm/string/trim.hpp> #include <fstream> #include <sstream> #include <string> #include <vector> it is all right to complie the project once I specify the path of the library of boost::regex. I found there are librarys in the directory libboost_regex-vc80-mt-s-1_33_1.lib and libboost_regex-vc80-mt-s.lib I wonder what's different between these two librarys? Which one should I used to develope a DLL? Thanks in advance.

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[mpl] Doc for for_each
by Scott Meyers 30 Mar '07

30 Mar '07

Having written code using a stateful functor with mpl::for_each and observing that side effects were not taking place, I went to http://www.boost.org/libs/mpl/doc/refmanual/refmanual_toc.html to confirm my suspicion that the functor was being passed by value. But there appears to be no documentation for mpl::for_each (neither in the HTML version of the reference manual nor in the PDF version). I ultimately confirmed my suspicion by looking at the header file, but is there a reason why for_each seems to be documented only in the printed book? Thanks, Scott

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[mpl] Implementing eraseVal
by Scott Meyers 30 Mar '07

30 Mar '07

Since set seems to be broken, I find myself wanting to implement this metafunction. It need work only for vectors: // erase all occurrences of T in Seq template<typename Seq, typename T> struct eraseVal; After several hours and tens or hundreds of thousands of lines of error messages from three compilers, I am unable to get it working. My attempt to do it the "right" way looks like this, and I must warn you in advance that it's not pretty, unless you like an approach that calls find three times with the same arguments: template<typename Seq, typename T> struct eraseVal : mpl::eval_if< boost::is_same<typename mpl::find<Seq, T>::type, typename mpl::end<Seq>::type>, typename mpl::identity<Seq>::type, eraseVal<typename mpl::erase<Seq, typename mpl::find<Seq,T>::type, typename mpl::next<typename mpl::find<Seq,T>::type>::type >::type, T> > {}; My more procedural attempt looks better (to me), but it still doesn't compile: template<typename Seq, typename T> struct eraseVal { typedef typename mpl::find<Seq,T>::type iter; typedef typename mpl::eval_if< boost::is_same<iter, typename mpl::end<Seq>::type>, typename mpl::identity<Seq>::type, typename eraseVal<typename mpl::erase<Seq, iter, mpl::next<iter>::type >::type, T>::type > type; }; God I miss iteration. And I really wish emacs would match angle brackets in C++ mode, sigh. Can somebody please help me out? Thanks, Scott

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errors by xlC not seen by gcc/vs2005
by Ferng, Andrew D 29 Mar '07

29 Mar '07

Hi all, I've got a problem with boost compiled under xlC. I've built boost on AIX with gcc 4.1.1 and xlC visual age 6. On the pc, with vs2005. So the same code using gcc/vs2005 is fine. Now when I'm compiling my code under xlC, I'm getting these issues popping up. Anyone have an idea of how to solve this? Or is it that xlC 6 is just not current enough to work with boost? Thanks! IDTApplication.cpp: "/acct/a/adf/boost/include/boost/optional/optional.hpp", line 388.66: 1540-0210 (S) "T" is not a base class of "locale". "/acct/a/adf/boost/include/boost/optional/optional.hpp", line 388.10: 1540-0700 (I) The previous message was produced while processing "boost::optional_detail::optional_base<std::locale>::destroy_impl(is_not _reference_tag)". "/acct/a/adf/boost/include/boost/optional/optional.hpp", line 362.9: 1540-0700 (I) The previous message was produced while processing "boost::optional_detail::optional_base<std::locale>::destroy()". "/acct/a/adf/boost/include/boost/optional/optional.hpp", line 208.24: 1540-0700 (I) The previous message was produced while processing "boost::optional_detail::optional_base<std::locale>::~optional_base()". "/acct/a/adf/boost/include/boost/optional/optional.hpp", line 130.7: 1540-0700 (I) The previous message was produced while processing "boost::optional_detail::optional_base<std::locale>::__dftbdt()". "/acct/a/adf/boost/include/boost/optional/optional.hpp", line 471.5: 1540-0700 (I) The previous message was produced while processing "boost::optional<std::locale>::~optional()". "/acct/a/adf/boost/include/boost/format/internals.hpp", line 38.9: 1540-0700 (I) The previous message was produced while processing "boost::io::detail::stream_format_state<char,std::char_traits<char> >::stream_format_state(char)". "/acct/a/adf/boost/include/boost/format/internals.hpp", line 78.53: 1540-0700 (I) The previous message was produced while processing "boost::io::detail::format_item<char,std::char_traits<char>,std::allocat or<char> >::format_item(char)". "/acct/a/adf/boost/include/boost/format/format_implementation.hpp", line 121.40: 1540-0700 (I) The previous message was produced while processing "boost::basic_format<char,struct std::char_traits<char>,class std::allocator<char> >::make_or_reuse_data(size_t)". "/acct/a/adf/boost/include/boost/format/parsing.hpp", line 415.9: 1540-0700 (I) The previous message was produced while processing "boost::basic_format<char,struct std::char_traits<char>,class std::allocator<char> >::parse(const string_type &)". "/acct/a/adf/boost/include/boost/format/format_implementation.hpp", line 33.13: 1540-0700 (I) The previous message was produced while processing "boost::basic_format<char,struct std::char_traits<char>,class std::allocator<char> >::basic_format(const char *)". "IDTApplication.cpp", line 1079.17: 1540-0700 (I) The previous message was produced while processing "IDTApplication::createO(Pnt29aFile &, IDTConditionCodeFile &, string &, IDTDetails_File &)". IDT.cpp:

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[serialization] Enable serialization for a heirarchy of objects
by Sohail Somani 29 Mar '07

29 Mar '07

Hi, Is it possible to enable serialization solely for a heirarchy of objects? I was thinking something like: template<typename Derived> struct implementation_level<Derived, typename ::boost::enable_if<::boost::is_base_of<Base,Derived> >::type> { typedef mpl::integral_c_tag tag; typedef mpl::int_< ::boost::serialization::object_serializable > type; BOOST_STATIC_CONSTANT(int,value = implementation_level::type::value ); }; But that requires implementation_level to be patched. Maybe there is another obvious way that I am missing. Thanks, Sohail

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install problem. windows vista; vs2k5 (vista service pack)
by Garrett McGrath 29 Mar '07

29 Mar '07

Ok so I've used boost before in passing on a Linux system but I've never set it up before on a windows system. Currently I'm looking at it for learning some advanced programming techniques with shared pointers and just to get a general handle of the rest of the libraries. However I can't seem to get boost.jam to install on my Windows Machine and the error is a fairly cryptic one that I'm not sure of the relevance of. Specifically: \Utilities\Bin\x86 was unexpected at this time. I have found a directory area with that structure on my system, specifically in the directx SDK area. The error kills the build script the same way regardless of the compiler it's pointed to so I'm leaning towards it being some sort of environment issue but I'm not sure. Important notes are I'm running the Vista Enterprise edition with VS2k5 and the SP1 patch for vista so this could be lending to the problem. Has anyone had a similar issue? (I'm attempting to dig thru the archives but they sadly lack a search feature.) -Garrett McGrath Software Engineer CSBMB Princeton University Green Hall 1-(609)-258-0285 -Garrett McGrath Software Engineer CSBMB Princeton University Green Hall 1-(609)-258-0285

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[serialization] Virtual load/save?
by Sohail Somani 29 Mar '07

29 Mar '07

Hi, If I wanted to have virtual load/save functions - just bear with me - should it just be as simple as making serialize(concrete_[oi]archive &,uint) virtual? Thanks, Sohail

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