May 2006 - Boost-users - lists.boost.org

[tuple] How to manipulate the types
by Adrián Etchevarne 30 May '06

30 May '06

Problem: How can I get a tuple type from a tuples::cons<> list ? example: given the type: cons<int, cons<float, cons<int, null_type> > > obtain tuple<int, float, int> Real problem: I need to insert a type T at the beginning of a tuple, how I can do this? example given the type T and tuple<int, float>, obtain a tuple<T, int, float> Thanks in advance, Adrián

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Google Summer of Code
by Christian Henning 30 May '06

30 May '06

Don't know if everyone noticed. Here are the boost projects that google is sponsoring. http://code.google.com/soc/boost/about.html For me, I cannot wait for the concurency lib. Regards, Christian

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[string_algo][range] compile problem with recent cvs
by Chris Hoeppler 30 May '06

30 May '06

Hi, the following snippet used to compile with the last released versions of boost: #include <boost/algorithm/string/replace.hpp> #include <string> int main() { char* esc = "\t"; char* sub = "\\t"; std::string str("\tbla\t"); boost::algorithm::replace_all(str, esc, sub); return 0; } Trying the current anonymous cvs version, it fails to compile on linux with gcc version 3.3.3. Is this to be expected? Chris Error messages: gcc.compile.c++ bin/gcc/debug/replace_all.o ../../boost-built/boost/range/const_iterator.hpp: In instantiation of `boost::range_const_iterator<char*>': ../../boost-built/boost/algorithm/string/replace.hpp:653: instantiated from `void boost::algorithm::replace_all(SequenceT&, const Range1T&, const Range2T&) [with SequenceT = std::string, Range1T = char*, Range2T = char*]' replace_all.cpp:17: instantiated from here ../../boost-built/boost/range/const_iterator.hpp:37: error: `char*' is not a class, struct, or union type ../../boost-built/boost/algorithm/string/replace.hpp: In function `void boost::algorithm::replace_all(SequenceT&, const Range1T&, const Range2T&) [with SequenceT = std::string, Range1T = char*, Range2T = char*]': replace_all.cpp:17: instantiated from here ../../boost-built/boost/algorithm/string/replace.hpp:653: error: no matching function for call to `first_finder(char* const&)' ../../boost-built/boost/algorithm/string/detail/formatter.hpp: At global scope: ../../boost-built/boost/algorithm/string/detail/formatter.hpp: In instantiation of `boost::algorithm::detail::const_formatF<char*>': ../../boost-built/boost/algorithm/string/formatter.hpp:46: instantiated from `boost::algorithm::detail::const_formatF<RangeT> boost::algorithm::const_formatter(const RangeT&) [with RangeT = char*]' ../../boost-built/boost/algorithm/string/replace.hpp:653: instantiated from `void boost::algorithm::replace_all(SequenceT&, const Range1T&, const Range2T&) [with SequenceT = std::string, Range1T = char*, Range2T = char*]' replace_all.cpp:17: instantiated from here ../../boost-built/boost/algorithm/string/detail/formatter.hpp:35: error: no type named `type' in `struct boost::range_const_iterator<char*>' ../../boost-built/boost/algorithm/string/detail/formatter.hpp:36: error: no type named `type' in `struct boost::range_const_iterator<char*>' ../../boost-built/boost/algorithm/string/detail/formatter.hpp:54: error: no type named `type' in `struct boost::range_const_iterator<char*>' ../../boost-built/boost/algorithm/string/detail/formatter.hpp:54: confused by earlier errors, bailing out "g++" -ftemplate-depth-128 -O0 -fno-inline -Wall -g -fPIC -DBOOST_ALL_NO_LIB=1 -I"." -I"../../boost-built" -c -o "bin/gcc/debug/replace_all.o" "replace_all.cpp" ...failed gcc.compile.c++ bin/gcc/debug/replace_all.o...

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Filesystem...
by Alessandro Testa 30 May '06

30 May '06

hi, I've a problem with a simple program. the source is like this: int main(int argc, char **argv) { std::string s("./"); boost::filesystem::path p(s, WifiSolution::check_name); etc... this program works fine on linux and freebsd. when I try to execute it on windows xp it throws an exception during the creation of the object p, more specific in the function m_path_append. the complete stack is msvcr80.dll!operator new(unsigned int size=3435973868) Line 63 + 0x1e bytes C++ msvcp80.dll!std::_Allocate<char>(unsigned int _Count=3435973868, char * __formal=0x00000000) Line 44 + 0x6 bytes C++ msvcp80.dll!std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Copy(unsigned int _Newsize=3435973867, unsigned int _Oldlen=31) Line 1986 + 0xd bytes C++ msvcp80.dll!std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Grow(unsigned int _Newsize=3435973867, bool _Trim=false) Line 2012 + 0xb bytes C++ msvcp80.dll!std::basic_string<char,std::char_traits<char>,std::allocator<char> >::append(const std::basic_string<char,std::char_traits<char>,std::allocator<char> > & _Right={...}, unsigned int _Roff=0, unsigned int _Count=3435973836) Line 931 + 0x16 bytes C++ msvcp80.dll!std::operator+<char,std::char_traits<char>,std::allocator<char> >(const std::basic_string<char,std::char_traits<char>,std::allocator<char> > & _Left="invalid name "ÌÌÌÌ." in path: "", const std::basic_string<char,std::char_traits<char>,std::allocator<char> > & _Right="ÌÌÌÌ./") Line 25 + 0x21 bytes C++ Backup++.exe!boost::filesystem::path::m_path_append() + 0xddc bytes C++ Backup++.exe!boost::filesystem::path::path() + 0x4b bytes C++ Backup++.exe!main(int argc=1, char * * argv=0x003a5c40) Line 22 + 0xf bytes C++ as you can see I'm using Microsoft Visual Studio .NET 2005 (vc-8.0) Any idea? Bye Alex

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Re: [Boost-users] boost installer - what should be expected
by Ovanes Markarian 30 May '06

30 May '06

>On 5/30/06, Sebastian Redl <sebastian.redl_at_[hidden]> wrote: > >> These settings are not per-project in VS, at least not typically (I'm >> not sure whether per-project include paths are even possible). Neither >> do they hurt, in particular not with Boost, where all headers are in a >> subdirectory. On the other hand, you _have_ to add the include and >> library paths, or else hard-code the full path to the Boost includes in >> the include file names. Nobody does that. >> >> Sebastian Redl > >There are per-project include paths in VC++ - they're under the >property 'Additional Include Directories' and are added using the -I >option of cl. > >That's the mechanism by which I add third-party library paths to VC++ >projects - although not hardcoded - I define a whole load of >environment variables. I'm using VC7.1 - I use Solution Build >Environment add-in >(http://www.workspacewhiz.com/OtherAddins.html#SolutionBuildEnvironment) >to define them, but in VC8.0 there is a built in mechanism (define a >property sheet using the property manger, define the environment >variables in the User Macros option) that can be used for that >purpose. > >Why prefer per-project settings, I hear you cry? Well, for older >projects that used older versions of Boost that I really don't want to >upgrade! The last time I did that (1.30.0 to 1.32.0, I think), >upgrading my use of the Boost.Iterator libraries was a bit of a pain. > >Oh yeah - there's also per-project library path settings as well - >they obviously need to be set for Boost libraries needing linking. > >Stuart Dootson I would like to address all issues here in one mail. May be this is the best: 1. Per-Project Setting are deviation from the discussed point, but I see Per-project settings essential for distributed development, since it is possible (in visual c++) to use relative paths and manage libs related to the projects with these projects. So one can create a structure: my_project_workspace | +-- thirdparty | +-- boost 1.32 | +-- xerces 2.6 | +-- xalan x.x | +-- project files and sub projects All these projects can reference relative include paths and libs regardless of visual c++ directories set. This way you can compile sources by taking them from version control and calling build.bat or whatever script without running any fine tuning at the certain system. 2. Why would I need an installer if I can also use zip file. I understand that the installer downloads pre-build libs which I select. But try to trace how many users download only one required lib instead of the entire bunch? 3. I think a setup can feature the following selection options: - ask the user to register the PATH-EnvVar, so that binary files are automatically found (NSIS supports it) - ask the user to register boost libs in Include path of VC++ (Win32, x64, PocketPC...) - ask the user to register boost libs in Lib path of VC++ (Win32, x64, PocketPC...) There is an article in MSDN how to do that. Please read: ms-help://MS.VSCC.v80/MS.MSDN.v80/MS.VisualStudio.v80.en/dv_vcextall/html/T_Microsoft_VisualStudio_VCProjectEngine_VCPlatform.htm It relies on .NET, but I think it is now not possible to install the VC++ without .NET Environment. 4. I would select the Windows Installer Technology anyway: - Graphical Installer creation Tool is available with Visual C++ (more or less free if you have VC++) - This Technology can be repackaged by other system administrators to deploy boost-libs within the enterprise (this happens pretty often) - Merge Modules can be used to provide users with pre-defined boost distribution components. A user only needs to select the appropriate MSM-Package to be linked with the application setup. I understand that these points require a lot, but this would be a "perfect installer". With Kind Regards, Ovanes Markarian

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boost installer - what should be expected
by Ovanes Markarian 30 May '06

30 May '06

Hello, yesterday I downloaded the boost installer package from boost-consulting site (http://www.boost-consulting.com/download.html) and started the installation. Everything was fine, but now I have a question: After choosing and installing the desired libraries I would like to know what should be expected as a result? I selected to install the libraries for Visual C++ 8.0, but I still had to put manually into C++ Options Dialog the directories to boost includes, libs and binaries. Shouldn't this be done by setup? Would not it be better to create merge modules, so that boost users could use them for their installations as well? With Kind Regards, Ovanes Markarian

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[review][pimpl_ptr] Pimpl Pointer review begins
by Rene Rivera 29 May '06

29 May '06

The review of the pimpl_ptr library by Asger Mangaard starts today, Monday May 15th, 2006, and runs through May 25th, 2006. (Boost Reviews RSS feed <http://tinyurl.com/ogpj6>) Pimpl Pointer ------------- :Author: Asger Mangaard :Download: Boost Sandbox (http://boost-consulting.com/vault/) as "pimpl_ptr.zip". Direct download at <http://tinyurl.com/m66ox>. :Description: The pimpl idiom is widely used to reduce compile times and disable code coupling. It does so by moving private parts of a class from the .hpp file to the .cpp file. However, it's implementation can be tricky, and with many pitfalls (especially regarding memory management). The pimpl_ptr library is a single header file, implementing a special policy based smart pointer to greatly ease the implementation of the pimpl idiom. Review questions ---------------- Please always explicitly state in your review, whether you think the library should be accepted into Boost. You might want to comment on the following questions: - What is your evaluation of the design? - What is your evaluation of the implementation? - What is your evaluation of the documentation? - What is your evaluation of the potential usefulness of the library? - Did you try to use the library? With what compiler? Did you have any problems? - How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? - Are you knowledgeable about the problem domain? Enjoy, Rene. -- -- Grafik - Don't Assume Anything -- Redshift Software, Inc. - http://redshift-software.com -- rrivera/acm.org - grafik/redshift-software.com -- 102708583/icq - grafikrobot/aim - grafikrobot/yahoo

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[BGL] property tag classes and "num"
by Jens Müller 29 May '06

29 May '06

From <http://www.boost.org/libs/graph/doc/using_adjacency_list.html#sec:adjacency…>: | Custom Edge Properties | | Creating your own property types and properties is easy; just define a | tag class for your new property. The property tag class will need to | define num with a unique integer ID, and kind which should be either | edge_property_tag, vertex_property_tag, or graph_property_tag. | | struct flow_t { | typedef edge_property_tag kind; | }; | | struct capacity_t { | typedef edge_property_tag kind; | }; It works with structs like this. Am I missing something, or where is "num"?

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[Serialization] Serializing boost::tuples
by Christian Henning 29 May '06

29 May '06

Hi there, I know that serializing of std::pair is part of the current serialization lib. I'm just wondering if there is something for the boost's tuples? Is it maybe in a different header file? I think that would be a cool feature and not so difficult to implement. But maybe I'm naive? Thanks, Christian

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rule install unknown
by Bert Verbeek 29 May '06

29 May '06

Hello All, after some years of using jam, I tried to switch to bjam today. I'm using deb packages from the debian linux testing distro: bjam-3.1.11-1 boost-build-2.0-m10-1 (Building bjam myself from sources gave exactly the same result) Compiling a very simple qt4 application file is no problem. But installing it in a dist directory will not happen? bjam reports: src/Jamfile:7: in modules.load rule install unknown in module Jamfile</home/bert/projects/qscope/src>. /usr/share/boost-build/build/project.jam:255: in load-jamfile /usr/share/boost-build/build/project.jam:67: in load /usr/share/boost-build/build/project.jam:71: in project.load /usr/share/boost-build/build-system.jam:75: in load /usr/share/boost-build/kernel/modules.jam:259: in import /usr/share/boost-build/kernel/bootstrap.jam:120: in boost-build /usr/share/boost-build/boost-build.jam:1: in module scope ---- qscope/src/Jamfile --------------------------------------- exe qscope : main.cpp : <library>/usr/lib/libQtCore.so <library>/usr/lib/libQtGui.so ; install dist : qscope ; ------------------------------------------------------------------ Searching the net/user mailing list and reading bjam -d9 output didn't help me. Can you give me a hint how to proceed? Thanks in advance. Kind regards Bert Verbeek

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