- Boost-users - lists.boost.org

[mpl] how to create a map using an algorithm
by Yuval Ronen 26 Aug '06

26 Aug '06

Lets say I have several types t1, t2, t3, and so on. Each of them has a typedef x within it. I want to be able to get a type y, and find the type t which holds is_same<y, t::x>. I thought of doing it using mpl::map< pair<t1::x, t1>, pair<t2::x, t2>, ...>. The problem is how to create the map. I can create it manually, just like in the previous sentence, but I hope there's a better way. Is there some transform algorithm that I can pass it an mpl::set<t1, t2, ...> and a meta-function that yields t::x for any given t, and this algorithm would produce the desired map? Thanks, Yuval

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[boost::function_types] Create function type from member function type
by Peter Soetens 25 Aug '06

25 Aug '06

Hi, I was looking for a way to convert a member function type: bool (X::*)(int) or bool (X::)(int) to the 'C' equivalent, without the class pointer: bool (*)(int) or bool(int) Now, I used this helper class: // Converts R (X::)(Args) to R (Args) template<class F> class UnMember { typedef boost::function_type_signature<F> member_signature; typedef typename boost::mpl::erase<typename member_signature::types, typename boost::mpl::next<typename boost::mpl::begin<member_signature>::type>::type>::type non_member_signature; public: typedef typename boost::function_type<boost::plain_function,non_member_signature>::type type; }; And use it like: typedef UnMember<bool(X::)(int)>::type PlainFunctionType; It gets even complexer when one wants to convert a member function type to a function type which takes the member as first argument: // Converts R (X::)(Args) to R (X::*, Args) template<class F> class MemberToFirstArg { typedef boost::function_type_signature<F> member_signature; // remove the class from the arg list: typedef typename boost::mpl::erase<typename member_signature::types, typename boost::mpl::next<typename boost::mpl::begin<member_signature>::type>::type>::type non_member_signature; // insert it as first argument. typedef typename boost::mpl::insert<non_member_signature, typename boost::mpl::next<typename boost::mpl::begin<non_member_signature>::type>::type, typename boost::add_pointer<typename boost::mpl::at<typename member_signature::types,boost::mpl::int_<1> >::type>::type >::type arg_signature; public: typedef typename boost::function_type<boost::plain_function,arg_signature>::type type; }; Is there an easier way to do this ? Does a boost library have a mechanism to convert member function types to non-member function types and vice versa ? Peter -- Peter Soetens -- FMTC -- <http://www.fmtc.be>

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Re: [Boost-users] boost.test and Cruise Control
by Ferentinos, Jerry 25 Aug '06

25 Aug '06

Matt Schuckmann wrote: > Up to using NAnt that sounds pretty much like what I want to do. Right > now I'm pretty much just having CC.NET do the build via the Dev Studio > command line interface. We are still on .NET 2003 right now but the 2005 > disks should be here next week. > What does using NAnt buy you that CC.NET doesn't have? > Do you have CC.NET do anything with the results of the unit tests, I.E > have it display the tests/test_suites run, have it display errors and > maybe even notify when people when test fail? I know that Boost.Test can > produce xml output but I don't know how to begin to have CC.NET consume it. The benefit of NAnt is that it is able to launch build of Visual Studio solutions, there's no having to mess with command lines and the like. Another benefit is NAnt integration with our version control system (ClearCase). Basically we have CruiseControl observe the ClearCase integration stream, issuing NAnt builds when new deliveries appear in the stream. NAnt is used to control the whole build process as well as running the tests and reacting to their results. Using NAnt we're able to perform many of the administrative tasks involved in version control and configuration management as well as promote the baselines as they pass through our build/smoke/integration tests. For CC.NET to consume Boost.Test output you will have to write an XSL transform to convert Boost.Test XML output to a format recognized by CC.NET. Jerry Ferentinos Basic Research Informatics Merck Frosst Center for Therapeutic Research www.merckfrosstlab.ca ------------------------------------------------------------------------------ Notice: This e-mail message, together with any attachments, contains information of Merck & Co., Inc. (One Merck Drive, Whitehouse Station, New Jersey, USA 08889), and/or its affiliates (which may be known outside the United States as Merck Frosst, Merck Sharp & Dohme or MSD and in Japan, as Banyu - direct contact information for affiliates is available at http://www.merck.com/contact/contacts.html) that may be confidential, proprietary copyrighted and/or legally privileged. It is intended solely for the use of the individual or entity named on this message. If you are not the intended recipient, and have received this message in error, please notify us immediately by reply e-mail and then delete it from your system. ------------------------------------------------------------------------------

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scoped_ptr and swap question?
by Michael Nicolella 25 Aug '06

25 Aug '06

Looking at boost::scoped_ptr, as I understand it it's meant to model sole-ownership without transfer-of-ownership semantics. If that's the case, what is the utility for having it support swap() operations ? What functionality is lost if the swap() capability is removed? Thanks, Mike

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Re: [Boost-users] Boost serialization : Stream error exception
by Nat Goodspeed 25 Aug '06

25 Aug '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org [mailto:boost-users- > bounces(a)lists.boost.org] On Behalf Of smith smithson > Sent: Friday, August 25, 2006 10:43 AM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] Boost serialization : Stream error exception > > I figured out what the problem is; I use a buffered > version of iostream/stream_buf to buffer data from my > mmap'd file and pass it out when requested. For some > reason if the very first character in the buffer is > character 255 (an extended ascii character) in any of > the buffers, I get the stream error exception. Any > suggestions why this might happen? Is this reserved in > some way? I see the issue in both text mode and binary > mode. [Nat] Do you have access to the source code to your buffered version of stream_buf? Is the buffer declared as an array of char? Does char default to signed with your compiler? If so, char 255 == 0xFF can get returned as the int value -1 -- which is still used as EOF in the stream code I've poked through. Sorry if this is way off base, but I've been bitten before by not using unsigned char for buffers containing bytes with high-order bits set.

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Boost serialization : Stream error exception
by smith smithson 25 Aug '06

25 Aug '06

I'm trying to use boost serialization to serialize/deserialize data to and from a mmap'd file. I have my own ostream/istream classes that essentially read/write bytes from a mmap'd file. The process works fine except on some rare occasions (With different objects/number of objects), in which case boost throws a "stream error" exception. Any ideas what could trigger this? A search of the Boost archives indicated other people had the same problem, where the solution was "use binary mode when you open the file"... but I'm not using a file on disk, I'm using a mmap'd file. (As a side note, the mmap file is large enough to hold all my data and does not need to be expanded or remmap'd etc) The OS i'm using is Linux. Thanks for any suggestions... __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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[boost-users] How to put together a tuple type?
by Christian Henning 25 Aug '06

25 Aug '06

Hi there, just trying to figure out how to put together a tuple type at compile type? Please consider the following code: struct s1 { static const int num_values = 1; int i; }; struct s2 { static const int num_values = 2; int i; int j; }; struct s3 { static const int num_values = 3; int i; int j; int k; }; template< class S > void create_tuple( S s ) { /// create tuple_type map< tuple_type, unsigned int > map; map[ make_tuple( s ) ] = 99; } The template parameter S will only be one of above defined structs. Clearly, I need to loop over S::num_values to create the tuple type. But how do I do that? Thanks ahead, Christian

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how to reverse a regex ?
by david v 25 Aug '06

25 Aug '06

Hello, Is it possible to reverse a regex. In my example below i'm trying to match the word "hope " and its reverse "epoh". Obviously i could build up a regex such as (hope|epoh) but i was wondering if there is a member in libboost that implements that function directly ? string re = "hope"; boost::regex *regex = new boost::regex(re,boost::regbase::icase); std::string in = "hope is forward and epoh is reversed"; boost::smatch match; std::string::const_iterator start = in.begin(); std::string::const_iterator end = in.end(); while (boost::regex_search(start,end,match,re,boost::match_extra)) { cout << "Match:" << match[0] ; } Thanks, david

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Re: [Boost-users] boost.test and Cruise Control
by Ferentinos, Jerry 25 Aug '06

25 Aug '06

-----Original Message----- From: Matt Schuckmann Sent: Thursday, August 24, 2006 11:43 AM Has anybody out there integrated tests built on boost.test with Cruise Control or Cruise Control .NET. ...snip... Hi Matt, We currently use CruiseControl.NET and boost::test for continuous integration and testing of our deliveries. What we'll typically do is create a testing project (.exe) for each module (.dll) in our system and invoke it from an NAnt script that we call from a CruiseControl task. As new testing projects are created we add them to the NAnt unit-testing target. NAnt can report non-zero return values from executables as being failures and CruiseControl can be configured to regard these as either build or test failures depending on how it's configured. Jerry Ferentinos Basic Research Informatics Merck Frosst Center for Therapeutic Research www.merckfrosstlab.ca We've started creating Unit Tests and we are just starting to use Cruise Control for continuous build integration and I'd like to have Cruise Control run and report on the unit tests. A quick look around Cruise Control only shows integration with NUnit. I don't know how tough or easy it is to make something workable with Boost.Test Sorry if this has already been addressed I did try to search for it but came with nothing in my new reader and the web interface is down. Thanks Matt S. _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users ------------------------------------------------------------------------------ Notice: This e-mail message, together with any attachments, contains information of Merck & Co., Inc. (One Merck Drive, Whitehouse Station, New Jersey, USA 08889), and/or its affiliates (which may be known outside the United States as Merck Frosst, Merck Sharp & Dohme or MSD and in Japan, as Banyu - direct contact information for affiliates is available at http://www.merck.com/contact/contacts.html) that may be confidential, proprietary copyrighted and/or legally privileged. It is intended solely for the use of the individual or entity named on this message. If you are not the intended recipient, and have received this message in error, please notify us immediately by reply e-mail and then delete it from your system. ------------------------------------------------------------------------------

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serialization library has misspelled constant
by Dan Bikel 25 Aug '06

25 Aug '06

The struct boost::serialization::tracking_level has a misspelled constant. Instead of it having a constant named "track_selectively", the constant is misspelled "track_selectivly". For backward compatibility, I would add a new constant with the correct spelling that has the value of the old, misspelled constant. (This bug exists in v. 1.33.1 of boost.) --Dan.

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