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Fusion/Phoenix/mpl/lamda/... (was Re: [Bind] arity of arbitrary object)
by Gottlob Frege 18 Jan '07

18 Jan '07

On 1/17/07, Joel de Guzman <joel(a)boost-consulting.com> wrote: > > Peter Dimov wrote: > > arity( _bi::bind_t<R,F,L> ) :- max( arity( e ) ) for each e in L > > arity( X ) :- is_placeholder<X>::value > > > > This could be much easier with a bind that uses a fusion tuple as L. :-) > > Phoenix :) > > Regards, > -- > Joel de Guzman > http://www.boost-consulting.com > http://spirit.sf.net Someone (Joel?) want to explain the differences between fusion/phoenix/mpl/etc/whatever-else-seems-overlapping? Thanks. Tony

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MPL-Buch
by Ovanes Markarian 18 Jan '07

18 Jan '07

Hi Dave, I was going to send to a collegue a link to some sample articles of your and Alexey's book, which were available online, but unfortunately they are not available now. I mean sample chapters from the site: http://www.boost-consulting.org/metaprogramming-book.html Is this intention? With Kind Regards, Ovanes Markarian

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Interprocess & STL
by Sunil Chomal 17 Jan '07

17 Jan '07

Dear All, As it was previously possible to use shmem shared memory allocator with STL containers, is it still possible to use the interprocess shared memory allocator along with STL containers? If I try to use a STL container with interprocess shared memory allocator, I get the following error: Error: cannot convert boost::interprocess::offset_ptr<type> to type* Can someone help with this issue? Regards, Sunil Chomal

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Regression tests for MSVC-8.0 on Win64?
by Anders Dalvander 17 Jan '07

17 Jan '07

Anyone doing regression tests for Microsoft Visual C++ 8.0 on 64-bit Windows? // Anders

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[Bind] arity of arbitrary object
by Chris Uzdavinis 17 Jan '07

17 Jan '07

Can anyone tell me how to determine the arity of an arbitrary bind object? I have a generic function that receives a bind object, but so far I've been unable to detect at compile time how many arguments it takes. Am I overlooking something obvious? Thanks a lot. Chris

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adjaceny_list typedef scope
by Alec Resnick 17 Jan '07

17 Jan '07

It would seem that I'm having a bit of trouble nailing down the scope of a typedef of the adjacency_list type in a class I'm writing. For some reason, I keep getting the error "error: 'directed_graph' does not name a type" when trying to compile the following code using XCode 2.4 with the boost library installed via DarwinPorts and the appropriate library and search paths (/opt/local/lib/ and /opt/local/ include/) set. If someone could help me out with this, I would very much appreciate it. Thanks for your time! Gratefully, a. /* * GARN.h * GA_RuleNetwork * * Created by Alec Resnick on 1/8/07. * Copyright 2007 dror. All rights reserved. * */ #ifndef GRAPH_AUTOMATA_RULE_NETWORK_CLASS_HEADER_FILE #define GRAPH_AUTOMATA_RULE_NETWORK_CLASS_HEADER_FILE #include <iostream> #include <vector> #include <string> #include <math.h> #include <boost/graph/adjacency_list.hpp> #include "GARN_helpers.h" #include "GARN_neighborhood.h" using namespace std; using namespace boost; class GARN{ typedef property<edge_name_t, int> edge_property; typedef property<vertex_name_t, GARN_neighborhood> vertex_property; typedef adjacency_list<vecS, vecS, directedS, vertex_property, edge_property> directed_graph; typedef graph_traits<directed_graph>::vertex_descriptor vertex; typedef graph_traits<directed_graph>::edge_descriptor edge; private: vector<int> lookupTable; int neighborhoodSize; int numStates; int ruleNumber; directed_graph ruleNetwork; vector<GARN_neighborhood> neighborhoodSpace; public: // Constructors------------------------------------------------------------ -> GARN(); GARN(int,int,int); // Destructors------------------------------------------------------------- -> ~GARN(); // Accessors--------------------------------------------------------------- -> directed_graph get_ruleNetwork(); // Mutators---------------------------------------------------------------- -> }; // Constructors------------------------------------------------------------ -----> GARN::GARN(){ } GARN::GARN(int _ruleNumber, int _numStates, int _neighborhoodSize){ ruleNumber = _ruleNumber; numStates = _numStates; neighborhoodSize = _neighborhoodSize; int neighborhoodSpaceSize = int(pow(numStates,neighborhoodSize)); lookupTable = intToNary(ruleNumber, numStates, neighborhoodSpaceSize); typedef property_map<directed_graph, vertex_name_t>::type vertex_map; typedef property_map<directed_graph, edge_name_t>::type edge_map; vertex_map vertexState = get(vertex_name, ruleNetwork); edge_map edgeState = get(edge_name, ruleNetwork); vertex parent, child; for(int i = 0 ; i < neighborhoodSpaceSize; ++i){ parent = add_vertex(ruleNetwork); child = add_vertex(ruleNetwork); GARN_neighborhood firstGeneration(intToNary (i,numStates,neighborhoodSize)); GARN_neighborhood secondGeneration(firstGeneration.stepTo (lookupTable.at(i))); vertexState[parent] = firstGeneration; vertexState[child] = secondGeneration; } } // Destructors------------------------------------------------------------- -----> GARN::~GARN(){ } // Accessors--------------------------------------------------------------- -----> directed_graph GARN::get_ruleNetwork(){ return ruleNetwork; } // Mutators---------------------------------------------------------------- -----> #endif

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Re: [Boost-users] [boost.serialization] compiler warnings
by jsanga＠cox.net 17 Jan '07

17 Jan '07

---- Robert Ramey <ramey(a)rrsd.com> wrote: > Double check that you're compiling with the switch that uses an intrinsic > type for wchar_t rather than a short int. > > Note that a lot of the warnings are from boost::io::state_saver... so maybe > there is an issue there. > > Robert Ramey I double checked. I'm treating wchar_t as an intrinsic type. I tried changing that and didn't notice any difference in the number of warnings issued.

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COM and boost::intrusive_ptr
by Philipp Henkel 17 Jan '07

17 Jan '07

Hi all, I would like to discuss some code I'm using to manage COM objects with intrusive_ptr. 1. I need to access the address of the raw pointer (to use QueryInterface). Therefore I implemented operator& for intrusive_ptr. Like in COM this pointer-pointer will only be used for intialization purposes. My implementation relies on the intrusive_ptr's memory layout and returns reinterpret_cast<T**>(addressof(ptr)). I know, this is evil... CComPtr-like usage: boost::intrusive_ptr<IVideo> video; someObject->QueryInterface(IID_IVideo,(void**)&video); Is there a better way? How do you bring intrusive_ptr and QueryInterface together? 2. My functions intrusive_ptr_add_ref and intrusive_ptr_release are specialized to handle IUnknown instances only. This way I avoid any conflicts with implementations of other reference counted objects. Maybe you can make use of them :-) Here's my code: template<typename T> T** operator&(intrusive_ptr<T>& ptr) { ASSERT(0 == *reinterpret_cast<T**>(addressof(ptr))); return reinterpret_cast<T**>(addressof(ptr)); } template<typename T> inline typename enable_if < is_base_of<IUnknown, T> >::type intrusive_ptr_add_ref(T* pObject) { pObject->AddRef(); } template<typename T> inline typename enable_if < is_base_of<IUnknown, T> >::type intrusive_ptr_release(T* pObject) { pObject->Release(); } Best regards, Philipp

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[regex] Does boost::regex support grouping?
by Roman Morokutti 17 Jan '07

17 Jan '07

Hi, I was just wondering if boost::regex supports grouping in either way. Roman

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Re: [Boost-users] BoostCon 2007 Program Committee progress report
by Peter 17 Jan '07

17 Jan '07

Something else that would be good to do if possible is to record the sessions. If this is possible these videos could be uploaded to youtube, google videos, or .... This way those of us who cannot afford or make the time to go could still learn quite a bit. Thanks, Peter > ------------------------------ > > Message: 4 > Date: Mon, 15 Jan 2007 14:31:03 -0000 > From: "Andrew Marlow" <Andrew.Marlow(a)icap.com> > Subject: Re: [Boost-users] BoostCon 2007 Program Committee progress > report > To: <boost-users(a)lists.boost.org> > Message-ID: > <EF291372CE2908408E5D44327293A81203E4E540(a)ukexmb4.uk.icap.com> > Content-Type: text/plain; charset="us-ascii" > > boost-users-bounces(a)lists.boost.org wrote: > > The conference dates (May 14-16) are firm, and other > > arrangements are moving forward. See > > http://www.boost.org/more/BoostCon07.html > > > This sounds like the bees knees. Unfortunately I will not be able to > persaude my current employer to send me and my colleagues to Colorado > for that week. What plans does Boost have for a UK conference please? I > am trying to get my employer to consider using boost for some platform > independence. > > Regards, > > Andrew Marlow >

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