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multi_index + pure abstract
by fungos 10 Dec '06

10 Dec '06

Doesn't multi_index accept hold classes that has pure abstract methods? Even if these methods aren't used by the container? Is there a way to get the container to hold objects with same interface? -- Animal Frontline Liberation

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[filesystem] path to temporary file
by Chris Weed 10 Dec '06

10 Dec '06

Hi, Is there any support in filesystem to create paths to temporary files. I would like to make unit tests to test my file reader, by creating temporary files that are in some safe platform temp area that can be deleted at exit. Chris

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Boost Serialization make_binary & XML/ASCII
by Terence Wilson 09 Dec '06

09 Dec '06

I need to parse an XML file generated by Boost Serialization, part of the file is a section generated by make_binary. I was wondering which scheme was used to convert binary to ASCII, uuencode, Base64? Obviously I need to know in order that I can convert back. TIA Dr. Terence Wilson Principal, Bayside Technical email: tez(a)latte.com web: http://latte.com

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date-time New US daylight saving rules
by michael mathews 09 Dec '06

09 Dec '06

Hi All, Will /are the daylight savings time rules adjusted to reflect the new law taking effect in 2007? The rules in 1.33.1 are incorrect starting in 2007. thanks in advance michael __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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[ptr_container] ownership
by David Grüner 09 Dec '06

09 Dec '06

Hello, i need to give up the ownership of a ptr_container (vector here) over its pointers (without assignment to a new ptr_container). Two questions here: 1. Do i really have to write aPtrContainer.release().release()? It looks weird. For me, the function name release() of the container seems confusing since an unassigned aPtrContainer.release() just does the "opposite" of auto_ptr<T>::release(), namely deleting the pointers. ;o) The behavior is more like transfer_ownership() or something similar ($0.02). 2. Beside managing memory, i plan to use ptr_container primarily to propagate const. So, in some cases i need a ptr_container which just doesn't own any given memory. What's the best way to do that? Any comments or pointers to missed docs are welcome. David

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Re: [Boost-users] boost::tokenizer and boost::tokenizer::iterator
by Benjamin Winkler 09 Dec '06

09 Dec '06

>I'm having a problem with tokenizer::iterator crashing the program when >I increment it. > > >tokens.assign(string("1234#4567#1##"), separator("#")); The tokenizer does not copy the sequence (the string) but only remembers its begin and end iterators. You are constructing a temporary string object which will be destroyed immediately at the end of the line, thus rendering the iterators invalid. Make sure that the string exists while you are using the tokenizer and its iterators on it, e.g. by making it a class member. Benjamin

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Problem with lambda bind & overloaded functions
by Santosh Joseph 09 Dec '06

09 Dec '06

I have read threads about this and tried to follow the solutions but I still compile time errors: i'm using vs2003.net and i get this problem with g++3.4.2 using namespace boost::lambda; boost::lambda::placeholder1_type Arg; typedef pair<set<string>::iterator,bool>(set<string>::*INSERT)(const string&); std::vector<string> v; set<string> str_con; INSERT insert_func = &set<string>::insert; for_each( v.begin(), v.end(), bind( insert_func, str_con, Arg)); p:\Vendor\boost-1.33.1\boost\lambda\detail\actions.hpp(96): error C2665: 'boost::lambda::function_adaptor<boost::lambda::return_type_N<boost::lambda::function_action<3>,boost::lambda::lambda_functor_base<boost::lambda::action<3,boost::lambda::function_action<3> >,boost::tuples::tuple<const boost::lambda::detail::bind_traits<const INSERT>::type,const boost::lambda::detail::bind_traits<const set<string> >::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type> >::sig<boost::tuples::tuple<const allocator<string>::value_type &> >::rets_t>::plain_Func>::apply': none of the 2 overloads can convert parameter 2 from type 'const rt1' ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com

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boost::tokenizer and boost::tokenizer::iterator
by Javier Estrada 08 Dec '06

08 Dec '06

I'm having a problem with tokenizer::iterator crashing the program when I increment it. I'm using it in a similar scope: In class constructor: { tokenizer tokens(...); tokenizer::iterator tokenIterator; } In a member function: { tokens.assign(string("1234#4567#1##"), separator("#")); tokenIterator = tokens.begin(); // use token iterator } In another member function: { cout << "token: " << *tokenIterator << endl; ++tokenIterator; ^^^ crash occurs in this instruction } I've verified: - Everything happens in the same thread (it's a multithreaded app) - tokenIterator != tokens.end(); Can anybody offer some insight? Regards, Javier

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Signals, Format and Bind
by Memfis 08 Dec '06

08 Dec '06

I have two signals: signal<void(int)> source; signal<void(string)> target; What want is for every call: source(12345); to have a call: target("the value is 12345"); I am trying to achieve this with format and bind, but without much luck. What I came up with is the following: source.connect(bind(ref(target), bind(&format::str, bind(&format::operator%, format("the value is %1"), _1))); Unfortunately the code above treats the parameter to source as if it was empty, i.e. I get calls target("the value is "); What am I doing wrong and how can this be done correctly? -- Memfis

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Boost 1.34 release
by Timm von Puttkamer 08 Dec '06

08 Dec '06

I would like to know when the next version of Boost will be released. Is there any time schedule? (At least I could not find anything on the website) Best regards Timm

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