June 2007 - Boost-users - lists.boost.org

Failing with "Getting Started on Windows" program
by Robert Murphy 10 Jun '07

10 Jun '07

Hello, Following instructions on the "Getting Started on Windows" page, I installed boost using the BoostPro 1.34.0 Installer on XP Pro. I included the Boost.Regex binaries as directed, too. I'm running VS C++ 2005 Express. SDK is not installed. All directories are linked to as instructed to do so in the properties window. I tried building the 2nd program: e-mail checker one. However I get "LINK : fatal error LNK1104: cannot open file 'user32.lib'" as an error. 'user32.lib' is in the SDK My questions are: 1. Must I have the SDK installed to use boost for general unit testing of code I personally generate? 2. Do I have to have the SDK installed for the above program to run? Thank you. _________________________________________________________________ Dont miss your chance to WIN $10,000 and other great prizes from Microsoft Office Live http://clk.atdmt.com/MRT/go/aub0540003042mrt/direct/01/

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posting
by Jan Stetka 10 Jun '07

10 Jun '07

There is a spam issue. Each time I post to the list I get a reply: Delivered-To: jan.stetka(a)gmail.com Received: by 10.143.43.6 with SMTP id v6cs257677wfj; Sat, 9 Jun 2007 12:47:33 -0700 (PDT) Received: by 10.35.8.1 with SMTP id l1mr6177223pyi.1181418453286; Sat, 09 Jun 2007 12:47:33 -0700 (PDT) Received-SPF: fail X-Gmail-Fetch-Info: 485309469254 1 pop.tiscali.co.uk 110 janpstetka(a)tiscali.co.uk Return-Path: <postmaster(a)sina.com> Received: from r3-111.sinamail.sina.com.cn (202.108.3.111) by mail-11.uk.tiscali.com (7.3.110.8) id 4669D52F00718B6F for janpstetka(a)tiscali.co.uk; Sat, 9 Jun 2007 20:52:04 +0200 Received: (qmail 18402 invoked by uid 99); 9 Jun 2007 18:51:56 -0000 Date: 9 Jun 2007 18:51:56 -0000 Message-ID: <20070609185156.18401.qmail(a)mail3-111.sinamail.sina.com.cn> From: <postmaster(a)sina.com> To: <janpstetka(a)tiscali.co.uk> Subject: =?gbk?B?Ym9vc3QtdXNlcnNAc2luYS5jb221xNfUtq+72Li0?= MIME_version: 1.0 Content-type: text/plain; charset=gbk; format=flowed Content-transfer-encoding: 8BIT Your message received. Thank you. -- =================================================================== ע��2G��䣨 http://mail.sina.com.cn/chooseMode.html ��

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interprocess
by Jan Stetka 09 Jun '07

09 Jun '07

Hi, Interprocess still has not been included in the documentation on the main site yet, wouldn't it be good to include it there as soon as possible as it would increase the usage of interprocess. The "quick guide for the impatient" on maps is very good and a welcome addition to the documentation. The documentation at http://ice.prohosting.com/newfunk/ boost/libs/interprocess/doc/html/interprocess/quick_guide.html #interprocess.quick_guide.qg_interprocess_map reads "Boost.Interprocess's map is The construction of map is a bit tricky, because" which could be an editing or typing mistake as it doesn't currently make much sense. Thanks

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Non-trivial examples of Boost::Interprocess library usage
by Evan Torrie 09 Jun '07

09 Jun '07

Hi I'm new to Boost, and also new to Boost::Interprocess. I've been reading through the documentation for Boost::Interprocess, and have successfully written an application which creates a tree like structure in a managed_memory_mapped_file; saves it to disk, and then other processes can reopen that mmap'ed file and traverse the tree. However, I feel like I really am not making the best use of the library, and would like to get more experience by reading other example code from significant applications Does anyone have source code of a non-trivial application that exercises shared memory or memory-mapped files, storing objects with pointers to other objects (and strings) into the shared memory, deleting, updating, retrieving them etc. Specifically, say I'm trying to port an existing heap-based structure into shared memory. struct foo { int x, y; std::vector< std::string > keys; struct foo* left, right; } struct foo* root; What would this translate to in the boost::interprocess world? Is it possible to write templatized versions of these data structures that would work either with the existing std::allocator heap-based memory or with boost::interprocess stateful allocators without needing to create two versions of this data structure? One problem I've encountered is that default constructors for boost::interprocess::vector/string etc are not possible since they need to be constructed with a stateful allocator... so, does this mean that any constructor for object foo requires an allocator to be passed in which is then used in the initializer list to initialize these member containers? Sorry if this doesn't make sense - but any help would be appreciated. Thanks Evan. ----------------------------------------- E> evan.torrie(a)yahoo.com

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Does Boost include SHA-1 implementation?
by Bo Xie 09 Jun '07

09 Jun '07

I know I can call openSSL(or its libcrypto) for SHA-1. But how about Windows? (I can not redistribute openSSL windows version.) My question is: Does Boost include SHA-1 implementation? Thanks! -Bo

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boostcon slides online
by Ares Lagae 08 Jun '07

08 Jun '07

One of the previous posts in this list made me wondering. Wouldn't it be nice to have the slides from the boostcon talks online? Best regards, -- Ares Lagae Computer Graphics Research Group, Katholieke Universiteit Leuven http://www.cs.kuleuven.be/~ares/

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[integer] Request: long long (64 bits) support for int_t and uint_t
by Niels Dekker - mail address until 2007-11-30 08 Jun '07

08 Jun '07

I would like to have "long long" and "unsigned long long" supported by boost::int_t and boost::uint_t. E.g., on Win32, VC++, I would expect int_t<64>::least to get me a long long. Are there plans to add this kind of support? Otherwise, should I submit my request as a ticket to svn.boost.org/trac/boost ? It looks like "long long" support can be added quite easily, as I already did so on my local copy of boost/integer.hpp. -- Niels Dekker http://www.xs4all.nl/~nd/dekkerware Scientific programmer at LKEB, Leiden University Medical Center

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boost::bind as composite
by Boris 08 Jun '07

08 Jun '07

Hi, I have two predicates f1 and f2 and I want to construct the predicate f4 = f1 && f2 using boost::bind. Unfortunately I observe a strange behaviour of boost::bind I can not explain. struct Test { int a; int b; }; Test t = { 1, 2 }; typedef boost::function< bool (Test const&) > Fn; Fn f1 = bind( &Test::a, _1 ) == 1; assert (f1( t )); // Ok Fn f2 = bind( &Test::b, _1 ) == 3; assert (!f2( t )); // ok Fn f3 = bind( std::logical_and< bool >(), bind( &Test::a, _1 ) == 1, bind( &Test::b, _1 ) == 3 ); assert (!f3( t )); // Ok Fn f4 = bind( std::logical_and< bool >(), f1, f2 ); assert (!f4( t )); // assertion failed Why does the predicate f4 behave different from f3? Thanks, Boris

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[parameter] A few usage questions
by John Maddock 08 Jun '07

08 Jun '07

I have a few usage questions for the Boost.Parameter library: 1) If I want to have a function called "policy" that's declared using BOOST_PARAMETER_FUNCTION can I access the types of the arguments both from within the functions body and for the functions return type: BOOST_PARAMETER_FUNCTION( (return-type-computed-from-arguments), policy, tag, // 3. namespace of tag types (optional // optional parameters, with defaults (domain_error, *, throw_on_error) ) (deduced (optional (precision, *, boost::mpl::int_<53>()) ) ) ) { // what type are the arguments? } I realise I can do this with an argument pack, but then either my users will have to call the function with an extra set of parenthesis, or I will have to write a bunch of forwarding functions myself - which itself generates a "what the is the return type" problem. >From within the body of the BOOST_PARAMETER_FUNCTION generated function it appears that I can use the name "Args" to refer to the type of the argument pack, and maybe in the return type as well? But this isn't documented, so can I rely on it? 2) All the arguments I want to pass are actually going to end up being used in meta-programs: for symbolic values, I can make each one a unique enum type, and use the type of the argument (even though it's actually passed as a value) to generate my metacode. But I have one optional argument where I require the value to be an arbitrary compile time constant, the only interface I can come up with at present is something like: policy(_digits10 = mpl::int_<10>()); But I'd really like to be able to write: policy(_digits10 = 12); and have the "12" converted to mpl::int_<12> "by magic", but I can't think of any magic that could be applied here... anyone any ideas? Thanks, John.

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[boost::variant] does 'incomplete<T>' still exist?
by jono 08 Jun '07

08 Jun '07

hi. i read a tutorial at http://electra.lbl.gov/stuff/variant/doc/tutorial.html which says a boost::variant type can be declared with an incomplete type in its typelist by using incomplete<T>. i'm using boost 1.33.1 & i can't find incomplete<T> anywhere. does it still exist? the tutorial is dated '14 February 2003'. can variants use incomplete types? i want to have a variant represent a type which has a variant member. can i do that? i'm working on a kind of envelope/letter idiom for dispatching operations on values. cheers jono

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