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[Regex] Some help with regular expression
by Etienne Philip Pretorius 19 Jul '09

19 Jul '09

Hello List. I have been trying to get this regular expression to work without any success. Perhaps if someone could just point out my mistake in the following regexp: /* http://www.w3.org/TR/REC-xml/#NT-PITarget */ entity grammar::process_instruction_target( std::string("(?!(X|x)(M|m)(L|l))(") + name.str() + std::string(")")); The 'name' regexp looks like this (Tested and working): /* http://www.w3.org/TR/REC-xml/#NT-Name */ entity grammar::name(std::string("(") + name_start_character.str() + std::string(")(") + name_character.str() + std::string(")*")); The others (name_start_character and name_character) are as follows (UTF8 encoding assumed): /* http://www.w3.org/TR/REC-xml/#NT-NameChar */ entity grammar::name_character(name_start_character.str() + std::string("|-|\\.|[0-9]|\\x{C2}\\x{B7}|") + std::string("\\x{CC}[\\x{80}-\\x{BF}]|") + std::string("\\x{CD}[\\x{80}-\\x{AF}]|") + std::string("\\x{E2}(\\x{80}\\x{BF})|(\\x{81}\\x{80})")); /* http://www.w3.org/TR/REC-xml/#NT-NameStartChar */ entity grammar::name_start_character( ":|[A-Z]|_|[a-z]|" "(\\x{C3}[\\x{80}-\\x{96}]|[\\x{98}-\\x{B6}]|[\\x{B8}-\\x{BF}])|" "([\\x{C4}-\\x{CB}][\\x{80}-\\x{BF}])|" "(\\x{CD}[\\x{B0}-\\x{BD}]|\\x{BF})|" "([\\x{CE}-\\x{DF}][\\x{80}-\\x{BF}])|" "(\\x{E0}[\\x{A0}-\\x{BF}][\\x{80}-\\x{BF}])|" "(\\x{E1}[\\x{80}-\\x{BF}]{2})|" "(\\x{E2}(\\x{80}[\\x{8C}-\\x{8D}])|" "(\\x{81}[\\x{B0}-\\x{BF}])|" "([\\x{82}-\\x{85}][\\x{80}-\\x{BF}])|" "(\\x{86}[\\x{80}-\\x{8F})|" "([\\x{B0}-\\x{BE}][\\x{80}-\\x{BF}])|" "(\\x{BF}[\\x{80}-\\x{AF}]))|" "([\\x{E3}-\\x{EC}][\\x{80}-\\x{BF}]{2})(?!\\x{E3}\\x{80}{2})|" "(\\x{ED}[\\x{80}-\\x{9F}][\\x{80}-\\x{BF}])|" "(\\x{EF}[\\x{A4}-\\x{B6}][\\x{80}-\\x{BF}])|" "(\\x{EF}\\x{B7}([\\x{80}-\\x{8F}]|[\\x{B0}-\\x{BF}]))|" "(\\x{EF}[\\x{B8}-\\x{BE}][\\x{80}-\\x{BF}])|" "(\\x{EF}\\x{BF}[\\x{80}-\\x{BD}])|" "(\\x{F0}[\\x{90}-\\x{BF}][\\x{80}-\\x{BF}])|" "([\\x{F1}-\\x{F2}][\\x{80}-\\x{BF}]{3})|" "(\\x{F3}[\\x{80}-\\x{AF}][\\x{80}-\\x{BF}]{2})"); Any help will be apreciated. You see the 'process_instruction_target' regexp keeps on matching for xml and any variant thereof... while it should match all except for the variants of xml. Thank you, Etienne

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enable_if catch all?
by Zachary Turner 19 Jul '09

19 Jul '09

Supposing I have 4 or 5 mutually exclusive overloads of a function using enable_if as a function parameter with a default argument, is there any way for me to provide an additional version of this function that handles every other case, without manually combining all the previous cases and using another enable_if? For example: template<class T> void foo(typename enable_if<condition1>::type* dummy=0) {} template<class T> void foo(typename enable_if<condition2>::type* dummy=0) {} template<class T> void foo(typename enable_if<condition3>::type* dummy=0) {} template<class T> void foo(typename enable_if<condition4>::type* dummy=0) {} template<class T> void foo() { //default instantiation that gets invoked if and only if all of the other overloads fail }

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[test] manual test suite initialization: linking problems
by Matthias Vallentin 19 Jul '09

19 Jul '09

I am having a linking issue with Boost.Test on my Mac OS X 10.5. Consider the following example: #define BOOST_TEST_DYN_LINK #include <boost/test/unit_test.hpp> void test() { } boost::unit_test::test_suite* init_unit_test_suite(int argc, char* argv[]) { boost::unit_test::test_suite* ts = BOOST_TEST_SUITE("test suite"); ts->add(BOOST_TEST_CASE(&test)); boost::unit_test::framework::master_test_suite().add(ts); return 0; } This does not compile with the following command: g++ test.cc -L/opt/local/lib -lboost_unit_test_framework-mt I am getting the following linker error: Undefined symbols: "_main", referenced from: start in crt1.10.5.o ld: symbol(s) not found collect2: ld returned 1 exit status It works, however, using the automatic test module definition, e.g. #define BOOST_TEST_DYN_LINK #define BOOST_TEST_MODULE foo #include <boost/test/unit_test.hpp> and works also when I remove BOOST_TEST_DYN_LINK and compile the program with the static library: g++ test.cc /opt/local/lib/libboost_unit_test_framework-mt.a But I can't get the first example code above to link. Does anyone see the problem lurking? Matthias -- Matthias Vallentin vallentin(a)icsi.berkeley.edu http://www.icir.org/matthias

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[mpl] type --> wrapper<type>
by Igor R 19 Jul '09

19 Jul '09

Hello, How to do in mpl the following: template<template<class> class wrapper, class arg> struct wrap { typedef wrapper<arg> type; }; Particularly, I've got a sequence of types, and I have to get shared_ptr's of these types. Thanks!

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Creating a managed_mapped_file
by Eli Zakashansky 19 Jul '09

19 Jul '09

Hello, I would like to create a managed_mapped_file which should contain a certain number of elements[n] of a certain size [k], therefore the required size which I would like to use is n*k (size of element * number of elements). But when the file is created [new bip::managed_mapped_file (bip::create_only, fileName, n*k);] besides the elements which I would like to placed in this file, a segment manager<http://www.boost.org/doc/libs/1_39_0/doc/html/interprocess/architecture.htm…> is also placed there and occupies an uncertain space [http://www.boost.org/doc/libs/1_39_0/doc/html/interprocess/architecture.htm…] I would like to know how much memory (size of file) shall I require in the C-tor so that my file will have enough space for n elements of size k, and be as compact as possible. Thanks in advance, Eli.

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asio async_write bad address error
by Thomas Klein 19 Jul '09

19 Jul '09

Hi there, I'm trying to use boost asio to transfer large objects through a tcp socket. I'm using the Serialization code from the asio documentation as reference. I got a transfer problem and can't find any clue, I'm posting here as a last resort. If someone has a little time to point out my mistakes I'll be really gratefull ! Here is a tgz of a code sample : http://archon.adept.free.fr/asioproblem.tgz In the archive you'll find a server and a client directory. in each directory you'll find a compile.sh file you'll have to adapt to your configuration. In the file asiotestserver/TcpConnection.cpp line 131 you''ll find a comment explaining the transfer problem. Thanks a lot in advance !

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[test] BOOST_*_EQUAL against constants
by Alexander Lamaison 19 Jul '09

19 Jul '09

A common scenario in my tests is comparing some unsigned value against a constant (most often 0 or 1): BOOST_REQUIRE_EQUAL(cbRead, 0); However, this generates a warning on MSVC complaining about a signed/unsigned mismatch (full message included at end): c:\boost\test\test_tools.hpp(536) : warning C4389: '==' : signed/unsigned mismatch c:\boost\test\test_tools.hpp(560) : see reference to function template instantiation 'boost::test_tools::predicate_result boost::test_tools::tt_detail::equal_impl(const Left &,const Right &)' being compiled with [ Left=ULONG, Right=int ] I can obviously cast the 0 constant to an unsigned it but it's getting tedious doing this every time. Surely there must be a better way? Is there some way to force the comparison to interpret constants as being of whatever type they are being compared to? Thanks. Alex c:\program files\boost\boost_1_38\boost\test\test_tools.hpp(536) : warning C4389: '==' : signed/unsigned mismatch c:\program files\boost\boost_1_38\boost\test\test_tools.hpp(560) : see reference to function template instantiation 'boost::test_tools::predicate_result boost::test_tools::tt_detail::equal_impl(const Left &,const Right &)' being compiled with [ Left=ULONG, Right=int ] c:\program files\boost\boost_1_38\boost\test\test_tools.hpp(575) : see reference to function template instantiation 'boost::test_tools::predicate_result boost::test_tools::tt_detail::equal_impl_frwd::call_impl(const Left &,const Right &,boost::mpl::false_) const' being compiled with [ Left=ULONG, Right=int ] c:\program files\boost\boost_1_38\boost\test\test_tools.hpp(523) : see reference to function template instantiation 'boost::test_tools::predicate_result boost::test_tools::tt_detail::equal_impl_frwd::operator ()(const Left &,const Right &) const' being compiled with [ Arg0=ULONG, Arg1=int, Left=ULONG, Right=int ] c:\users\awl03\documents\visual studio 2005\projects\swish_feature_write\test\provider\stream_write_test.cpp(202) : see reference to function template instantiation 'bool boost::test_tools::tt_detail::check_frwd(Pred,const boost::unit_test::lazy_ostream &,boost::test_tools::const_string,size_t,boost::test_tools::tt_detail::tool_level,boost::test_tools::tt_detail::check_type,const Arg0 &,const char *,const Arg1 &,const char *)' being compiled with [ Pred=boost::test_tools::tt_detail::equal_impl_frwd, Arg0=ULONG, Arg1=int ]

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A question on member functions when using lambda expression. Can anyone with kindness help me?
by fmingu 19 Jul '09

19 Jul '09

I am using Dev-C++ with lambda expression and building a DLL. In Dev-C++, when the program is used as a exe.It works fine. But I want to make it a class (i.e.classA in the following)in a DLL for other exes to use it. And the error occured: In dll.cpp: ................ void classA::a() ......................... (while_loop(bind(&isprime,_1)==false, ++var(result))(middlevalue); ...................... where bool isprime(int) is also a member function of classA. But the complier told me that: ISO C++ forbids taking the address of an unqualified non-static member function to form a pointer to member function. I do not know how to solve it. Can anyone with kindness help me?

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[Fusion] Understanding Fusion
by Robert Jones 19 Jul '09

19 Jul '09

Hi All I'm very much a Fusion newbie, just getting may head around it, so a really basic question! >From the intro page, when we write #include <boost/fusion/sequence.hpp> #include <boost/fusion/include/sequence.hpp> vector<int, char, std::string> stuff for_each(stuff, print_xml()); am I correct in believing that there is no loop involved in the for_each, and that this resolves, at compile time, to a linear list of function calls? Thanks, - Rob.

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BGL: graphml converter
by Caligula 18 Jul '09

18 Jul '09

Hi, Does anyone know if there is software to convert graphml format to pdf?

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