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[Fusion] Assignement from adapted struct to tuple
by Samuel Debionne 29 Mar '11

29 Mar '11

Hello all, While I managed to assign an adapted structure to a fusion vector, I fail to assign the same structure to a legacy tuple. The doc doesn't mention the assignement operator between two sequences, but I though it would work. Am I missing something ? #include <boost/fusion/include/vector.hpp> #include <boost/fusion/include/adapt_struct.hpp> #include <boost/fusion/include/boost_tuple.hpp> struct my_struct { double a; int b; char c; }; BOOST_FUSION_ADAPT_STRUCT( my_struct, (double, a) (int, b) (char, c)); my_struct src; boost::fusion::vector<double, int, char> dest1 = src; //OK boost::tuple<double, int, char> dest2 = src; //Fails Samuel

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FW: Platform Compatibility
by Shahriar, Khandaker (CONT) 29 Mar '11

29 Mar '11

Good Afternoon, Please verify if Boost Library is compatible with HPUX 11.x or AIX? Thx! Khan 804-284-7201 </pre> The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer. </pre>

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[boost::condition_variable_any] Telling cond to unlock_share()
by Panagiotis Foteinos 28 Mar '11

28 Mar '11

Hello users. Documentation says that cond.wait(mtx) blocks the current thread and invokes mtx.unlock(). What if I want cond.wait(mtx) to call mtx.unlock_shared() instead? Is there any way to do so? Regards, Panagiotis Foteinos

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OT: Why can't I insert a vector of int
by Patrick Horgan 28 Mar '11

28 Mar '11

I simplified this as much as possible and it turned into a template question, and not a boost question, but I hope that someone here will take a second and answer it anyway. I don't know of another mailing list with the expertise of this one in templates. In the below, the inserter for vector<int> is never used, instead, since the vector<int> is a type, it matches the simpler inserter for T. How can I make it work the way I want it to? #include <iostream> #include <vector> struct theclass { template<typename T> void operator<<(const T& t){ std::cout << "Got a T\n"; } template<typename T> void operator<<(std::vector<const T> t){ std::cout << "Got a vector of T\n"; } }; int main() { std::vector<int> vi; int i; theclass f; f << i; f << vi; }

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Re: [Boost-users] Regex question: is this a bug or a feature?
by Jerry 28 Mar '11

28 Mar '11

Kulti <kultihell <at> gmail.com> writes: > Ramon F Herrera <ramon <at> patriot.net> wrote: > > My pattern matching was failing when I had these definitions, > > which I happen to prefer: > > > > const string number = "[0-9]+"; > > const string name = "[A-z][A-z0-9]*"; > > > > The program is working fine now, after I am using these ones: > > > > const string number = "\\d+"; > > const string name = "[A-z]\\w*"; > > > > Could you please read documentation before posting question? > http://www.boost.org/doc/libs/1_45_0/libs/regex/doc/html/boost_regex/syntax… racter_classes/std_char_clases.html > "w - Any word character (alphanumeric characters plus the underscore)" > Actually I don't think he was asking why w included underscores - I think he was asking why that worked and his original character class based regex didn't. Jerry

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Boost::Polygon issue with including in project
by Chris Stylianou 28 Mar '11

28 Mar '11

I'm having an issue trying to use Boost::Polygon, I've added boost/polygon/polygon.hpp but when I try to compile I get: boost/polygon/transform.hpp:147: error: expected identifier before numeric constant boost/polygon/transform.hpp:147: error: expected `}' before numeric constant boost/polygon/transform.hpp:147: error: expected unqualified-id before numeric constant boost/polygon/transform.hpp:219: error: expected unqualified-id before ')' token boost/polygon/transform.hpp:220: error: expected `)' before 'atr' boost/polygon/transform.hpp:221: error: expected unqualified-id before 'const' boost/polygon/transform.hpp:221: error: expected `)' before 'const' boost/polygon/transform.hpp:222: error: expected unqualified-id before 'const' boost/polygon/transform.hpp:222: error: expected `)' before 'const' boost/polygon/transform.hpp:223: error: expected unqualified-id before 'const' boost/polygon/transform.hpp:223: error: expected `)' before 'const' boost/polygon/transform.hpp:224: error: expected unqualified-id before 'const' boost/polygon/transform.hpp:224: error: expected `)' before 'const' boost/polygon/transform.hpp:225: error: expected unqualified-id before 'const' boost/polygon/transform.hpp:225: error: expected `)' before 'const' boost/polygon/transform.hpp:228: error: 'boost::polygon::axis_transformation& boost::polygon::operator=(const boost::polygon::axis_transformation&)' must be a nonstatic member function boost/polygon/transform.hpp:231: error: expected ',' or '...' before '&' token boost/polygon/transform.hpp:231: error: 'boost::polygon::axis_transformation& boost::polygon::operator=(int)' must be a nonstatic member function boost/polygon/transform.hpp:234: error: non-member function 'bool boost::polygon::operator==(const boost::polygon::axis_transformation&)' cannot have cv-qualifier boost/polygon/transform.hpp:234: error: 'bool boost::polygon::operator==(const boost::polygon::axis_transformation&)' must take exactly two arguments boost/polygon/transform.hpp:237: error: non-member function 'bool boost::polygon::operator!=(const boost::polygon::axis_transformation&)' cannot have cv-qualifier boost/polygon/transform.hpp:237: error: 'bool boost::polygon::operator!=(const boost::polygon::axis_transformation&)' must take exactly two arguments boost/polygon/transform.hpp:240: error: non-member function 'bool boost::polygon::operator<(const boost::polygon::axis_transformation&)' cannot have cv-qualifier boost/polygon/transform.hpp:240: error: 'bool boost::polygon::operator<(const boost::polygon::axis_transformation&)' must take exactly two arguments boost/polygon/transform.hpp:243: error: non-member function 'boost::polygon::axis_transformation boost::polygon::operator+(const boost::polygon::axis_transformation&)' cannot have cv-qualifier boost/polygon/transform.hpp:246: error: 'boost::polygon::axis_transformation& boost::polygon::operator+=(const boost::polygon::axis_transformation&)' must take exactly two arguments boost/polygon/transform.hpp:250: error: non-member function 'void boost::polygon::populate_axis_array(boost::polygon::INDIVIDUAL_AXIS*)' cannot have cv-qualifier boost/polygon/transform.hpp:255: error: non-member function 'void boost::polygon::get_directions(boost::polygon::direction_2d&, boost::polygon::direction_2d&)' cannot have cv-qualifier boost/polygon/transform.hpp: In function 'void boost::polygon::get_directions(boost::polygon::direction_2d&, boost::polygon::direction_2d&)': ........etc ....... Thanks Chris

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Re: [Boost-users] lambda - if_then_else - Compiler can not deduce my Arguments
by Simon Adler 28 Mar '11

28 Mar '11

Hey Thomas > On Mon, Mar 28, 2011 at 11:16 AM, Thomas Heller < > thom.heller(a)googlemail.com> wrote: > >> On Monday, March 28, 2011 11:34:45 AM Simon Adler wrote: >> >> > class XML_Element >> > { >> > public: >> > const std::string & getName(void); >> > }; >> > >> > class HandleStuff >> > { >> > void handleTransformations( XML_Element * node ); >> > void handleLinks( XML_Element * node ); >> > >> > >> > void handle ( std::list<XML_Element *> * nodes ) >> > { >> > // what i want to do via boost and which will do the job >> > for (std::list< XML_Element *>::iterator it = nodes->begin(); it != >> > nodes->end(); it++) >> > { >> > if ( (*it)->getName() == "Transform" ) handleTransformations(*it); >> > else handleLinks(*it); >> > } >> > >> > // what i tried >> > std::for_each( nodes->begin(); nodes->end(), >> > boost::lambda::if_then_else( boost::bind(&XML_Element::getName, _1) >> == >> > std::string("Transform"), >> > >> > boost::bind<void>(&HandleStuff::loadTransformations, this, _1), >> > >> > boost::bind<void>(&HandleStuff::loadLinks, this, _1) ) >> > } >> > >> > } >> >> The error you made is that you mixed boost bind with lambda, which is not >> compatible. >> >> A solution with Phoenix looks like this: >> >> using boost::phoenix::arg_names::_1; >> using boost::phoenix::bind; >> using boost::phoenix::if_; >> >> std::for_each( nodes->begin(), nodes->end(), >> if_(bind(&XML_Element::getName, _1) == "Transform") >> [ >> bind(&HandleStuff::handleTransformations, this, _1) >> ] >> .else_ >> [ >> bind(&HandleStuff::handleLinks, this, _1) >> ] >> ); >> > Yes, it worked. I did not know Phoenix and included now boost/spirit/include/phoenix.hpp - quite big during compilation. It solved my Problem, but if this is a type missmatch - how can i solve this without Phoenix. I have to understand what is going on. I tried to solve this with explicit namespace declarations and replaced _1 via boost::lambda::_1 I also tried to replace all with ::_1 which should explicitly take the declarations from bind/placeholders.hpp thouse are in an unnamed namespace. Please - how can I solve this without using Phoenix? - Not that i don't like your solution but i will understand. Simon

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lambda - if_then_else - Compiler can not deduce my Arguments
by Simon Adler 28 Mar '11

28 Mar '11

Hello, i need a hint about boost::bind and lambda. Following (reduced) case: class XML_Element { public: const std::string & getName(void); }; class HandleStuff { void handleTransformations( XML_Element * node ); void handleLinks( XML_Element * node ); void handle ( std::list<XML_Element *> * nodes ) { // what i want to do via boost and which will do the job for (std::list< XML_Element *>::iterator it = nodes->begin(); it != nodes->end(); it++) { if ( (*it)->getName() == "Transform" ) handleTransformations(*it); else handleLinks(*it); } // what i tried std::for_each( nodes->begin(); nodes->end(), boost::lambda::if_then_else( boost::bind(&XML_Element::getName, _1) == std::string("Transform"), boost::bind<void>(&HandleStuff::loadTransformations, this, _1), boost::bind<void>(&HandleStuff::loadLinks, this, _1) ) } } got an error, that the compiler can not deduce a template Argument, but i do not understand what the compiler tries to say. I am new to bind and lambda and i like it a lot, but in some cases the Error-Messages are hard to understand. Thank you for any advice. Please understand, that this example is a reduced Version what is realy going on, so i only give the Functions Interfaces. Simon

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Regex question: is this a bug or a feature?
by Ramon F Herrera 28 Mar '11

28 Mar '11

My pattern matching was failing when I had these definitions, which I happen to prefer: const string number = "[0-9]+"; const string name = "[A-z][A-z0-9]*"; ("name" is supposed to match a typical variable name) The program is working fine now, after I am using these ones: const string number = "\\d+"; const string name = "[A-z]\\w*"; The only difference that I aware of, is that the second form accepts underscores as part of variable names. TIA, -RFH

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[test]
by Stirling Westrup 28 Mar '11

28 Mar '11

I have been using Boost.test to run some simple unit tests as I build my code. I've come across a case where I need to test if my code runs within an acceptable time limit. I know that the execution monitor has a timeout system for testing that sort of thing, but I can't figure out how it is supposed to be integrated into the unit test framework. Ideally, I'd love to just have a BOOST_CHECK_TIMED( f(), timeout) that I could invoke to ensure that the code returns true, and returns within the specified timeout interval. -- Stirling Westrup Programmer, Entrepreneur. https://www.linkedin.com/e/fpf/77228 http://www.linkedin.com/in/swestrup http://technaut.livejournal.com http://sourceforge.net/users/stirlingwestrup

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