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RE: [Boost-users] Re: Using shared_ptr across shared library boun dary
by Jim.Hyslop 12 Mar '04

12 Mar '04

David Abrahams wrote: > "Jim.Hyslop" <Jim.Hyslop(a)Leitch.com> writes: > > The biggest caveat is to ensure you are using the DLL > version of the C > > Runtime library. If you use the static library version, > then each DLL will > > have its own heap, and a pointer *must* be deallocated in > the same DLL in > > which it was allocated. > > Please stop; this is misinformation. What I wrote holds true for raw pointers. I had assumed it also held true for the Boost smart pointers, but as you pointed out in the other email - and I verified with a quick test - the smart pointers get around this problem. My apologies for the confusion. -- Jim Hyslop Senior Software Designer Leitch Technology International Inc. (http://www.leitch.com) Columnist, C/C++ Users Journal (http://www.cuj.com/experts)

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RE: [Boost-users] Re: Using shared_ptr across shared library boun dary
by Jim.Hyslop 12 Mar '04

12 Mar '04

David Abrahams wrote: > "Jim.Hyslop" <Jim.Hyslop(a)Leitch.com> writes: > > It's been my experience > > (with Visual Studio, at least) that allocating memory in one DLL and > > deallocating it in another leads to problems. Sometimes it doesn't > > go noticed, but when it does, it's really noticeable. > > The library cleverly avoids that, provided the first shared_ptr to > take ownership of the memory does so in the same DLL where the object > was allocated. Huh - whaddya know; I just tried it with this program: int main() { boost::shared_ptr< T > t = CreateT(); t.reset(); T * tptr = CreateRawT(); delete tptr; } where CreateT and CreateRawT are exported from a DLL (and do the obvious thing). 't.reset()' works OK, but 'delete tptr' asserts on an invalid heap pointer. I'll have to study the shared_ptr implementation to see how it avoids this problem. -- Jim Hyslop Senior Software Designer Leitch Technology International Inc. (http://www.leitch.com) Columnist, C/C++ Users Journal (http://www.cuj.com/experts)

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RE: [Boost-users] Using shared_ptr across shared library boundary
by Jim.Hyslop 11 Mar '04

11 Mar '04

Edward Diener wrote: > Is there any problem with using shared_ptr and passing an > instance of it to > a function in another shared library, such as a DLL under > Windows ? Does the > reference count get updated correctly when the copy is passed to a DLL > function, so that when the last shared_ptr in either the > original module or > the DLL goers out of scope, the actual pointer is correctly deleted ? I've been using it successfully across DLL boundaries with no problems. The biggest caveat is to ensure you are using the DLL version of the C Runtime library. If you use the static library version, then each DLL will have its own heap, and a pointer *must* be deallocated in the same DLL in which it was allocated. -- Jim Hyslop Senior Software Designer Leitch Technology International Inc. (http://www.leitch.com) Columnist, C/C++ Users Journal (http://www.cuj.com/experts)

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RE: [Boost-users] Re: Using shared_ptr across shared library boun dary
by Jim.Hyslop 11 Mar '04

11 Mar '04

David Abrahams wrote: > "Edward Diener" <eddielee(a)tropicsoft.com> writes: > > > Is there any problem with using shared_ptr and passing an > instance of it to > > a function in another shared library, such as a DLL under Windows ? > > Works beautifully, even if the two DLLs are using different heaps. Are you sure about the different heaps? It's been my experience (with Visual Studio, at least) that allocating memory in one DLL and deallocating it in another leads to problems. Sometimes it doesn't go noticed, but when it does, it's really noticeable. -- Jim Hyslop Senior Software Designer Leitch Technology International Inc. (http://www.leitch.com) Columnist, C/C++ Users Journal (http://www.cuj.com/experts)

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RE: [Boost-users] Re: Using shared_ptr across shared library boun dary
by Mark Storer 11 Mar '04

11 Mar '04

> Works beautifully, even if the two DLLs are using different heaps. How does that work? Do they both end up with the same allocator... so all the allocations end up on the same heap? --Mark Storer Software Engineer Cardiff Software #include <disclaimer> typdef std::disclaimer<Cardiff> Discard;

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Using shared_ptr across shared library boundary
by Edward Diener 11 Mar '04

11 Mar '04

Is there any problem with using shared_ptr and passing an instance of it to a function in another shared library, such as a DLL under Windows ? Does the reference count get updated correctly when the copy is passed to a DLL function, so that when the last shared_ptr in either the original module or the DLL goers out of scope, the actual pointer is correctly deleted ? If this is not the case, that shared_ptr works correctly across DLL boundaries in the manner described, does instantiating and exporting shared_ptr template instances from the DLL to the module using the DLL solve the problem ?

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boost::thread no parameter?
by GoochRules! 11 Mar '04

11 Mar '04

Greetings, I'm wondering why there is no option to pass a parameter to a thread function with boost's threads. With pthreads and Windows CreateThread I'm used to casting an object to a void*, and retrieving the object within the thread function. The only thing similar with boost::thread seems to be to create a struct with an operator()() and a constructor that takes a void*. operator()() then calls an external function with the passed void*. Just curious about this design decision. --M Peltzer

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Re: [Boost-users] Compiler Generator Tools
by Roel.Sergeant＠pandora.be 11 Mar '04

11 Mar '04

Hi Hossein, I know that Spirit can be used for scanning and lexical analysis, at least that where I use it for. I don't know about the rest, but I guess Spirit will help you out there too. In my little project I use it for parsing XML, HTML and other datafiles. For more info on spirit : http://spirit.sourceforge.net/ If you need a C/C++ parser, you might consider Wave, which uses Spirit, and is highly standard compliant. Hope this helps, Roel. >----- Oorspronkelijk bericht ----- >Van : Hossein Haeri [mailto:powerprogman@yahoo.com] >Verzonden : maandag , maart 8, 2004 01:07 PM >Aan : boost-users(a)lists.boost.org >Onderwerp : [Boost-users] Compiler Generator Tools > >Dear all, > >Who knows where I can find the compiler generation >stuff in the Boost repository? I need scaner, lexical >analyser, compiler, code generator, ... Are there any >such tools in the Boost which can build all of the >above goodies for me? > >TIA, >--Hossein > >__________________________________ >Do you Yahoo!? >Yahoo! Search - Find what you?re looking for faster >http://search.yahoo.com >_______________________________________________ >Boost-users mailing list >Boost-users(a)lists.boost.org >http://lists.boost.org/mailman/listinfo.cgi/boost-users > > >

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Compile problem
by fmonkey＠fmonkey.net 11 Mar '04

11 Mar '04

This may be a silly question, but why does the following code give me a compile error (only on Linux BTW, not Windows): template<typename TreeIterT> void ClassName::compile_something(const TreeIterT& iter, compile_context &ctx) { const TreeIterT::value_type& ident = get_first_leaf(*iter); } In member function `void ClassName::compile_something(const TreeIterT&, CompileContext&)': 128: error: syntax error before `&' token Also: template<typename TreeNodeT> void ClassName::compile_something_else(const TreeNodeT &tree, compile_context &ctx) { TreeNodeT::const_iterator iter = tree.begin(); } In member function `void ClassName::compile_something_else(const 138: error: syntax error before `=' token Any idea what is causing this?

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Graph, inv_adjacency_iterator_generator problem
by Peter Aronsson 10 Mar '04

10 Mar '04

Hi, I have a problem with traversing over all parents of a vertex. If I use (the undocumented?) inv_adjacency_iterator_generator class to return iterators for the parents (predecessors) of a vertex I get a compile error. It worked on an earlier version of the library (in debian testing), but does not work for the latest version(1.31.0). I think the problem is that it can no longer find a suitable constructor. Here is my code: // some typedefs removed...... typedef boost::graph_traits<TaskGraph>::in_edge_iterator InEdgeIterator; typedef boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, VertexProperty, EdgeProperty> TaskGraph; typedef boost::inv_adjacency_iterator_generator<TaskGraph, VertexID, InEdgeIterator>::type ParentsIterator; std::pair<ParentsIterator, ParentsIterator> parents(VertexID v, TaskGraph &tg) { InEdgeIterator e,e_end; tie(e,e_end) = in_edges(v,tg); ParentsIterator c(e),c_end(e_end); // problem here. No suitable constructor. return make_pair(e,e_end); } (Traversing through the children/predecessors works fine.) Regards Peter Aronsson -- _________________________________________________________________ / Peter Aronsson, Phd Student at PELAB (Programming Environments \ | Laboratory ) Department for Computer & Information Science | | Linköping University, Sweden | |=================================================================| | petar(a)ida.liu.se , phone +46 (0)13-28 1737 Room 3B:490 | \_________________________________________________________________/

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mpl lambda facilities
by Matt Calabrese 10 Mar '04

10 Mar '04

I'm trying to create a metafunction which takes in a boost::mpl::vector containing spirit parser types, and yields a vector of the original vector's length plus one with each element representing the parser type made of the recursive boost::spirit::alternative of all of the original parser types from the corresponding element in the original vector and an epsilon_parser at the end. in other words, the metafunction should be able to take in: (using boost::mpl and boost::spirit) vector< chlit<>, strlit<>, range<> > and yield a result: vector< alternative< chlit<>, alternative< strlit<>, alternative< range<>, epsilon_parser > > >, alternative< strlit<>, alternative< range<>, epsilon_parser > >, alternative< range<>, epsilon_parser >, epsilon_parser > where empty is my own parser type, similar to epsilon_parser I'm still new to metaprogramming and the mpl lambda facilities and I'm having some trouble creating a metafunction which produces my desired type. This is what I've come up with, though it doesn't work - I'm assuming because of my second use of mpl::_1 in the nested template parameter of mpl::front in mpl::push_front (which I'd like to have represent the current state of the mpl::fold). template< typename vector_t > struct get_alternatives { typename mpl::fold_backward< vector_t, mpl::vector< epsilon_parser >, typename mpl::push_front< mpl::_1, spirit::alternative< mpl::_2, typename mpl::front< mpl::_1 >::type > >::type >::type type; }; Any help is greatly appreciated. Thanks in advance.

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boost::thread and std::system
by Jerry Swan 10 Mar '04

10 Mar '04

I'd like to be able to issue a call to std::system that will time-out after a specified period. Is it possible to achieve this using the boost::threads library? If so could someone kindly sketch how this might be achieved? TIA, Jerry.

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python library issue migrating from boost_1_30_2 to boost_1_31_0
by Marco Donizelli 09 Mar '04

09 Mar '04

Hi there, when I built the 1_30_2 Python Library, I got: libboost_python.so now, with 1_31_0, I get several libs but that one: libboost_python-gcc-1_31.a libboost_python-gcc-1_31.so libboost_python-gcc-1_31.so.1.31.0 libboost_python-gcc.a libboost_python-gcc-d-1_31.a libboost_python-gcc-d-1_31.so libboost_python-gcc-d-1_31.so.1.31.0 libboost_python-gcc-d.a libboost_python-gcc-d.so libboost_python-gcc-mt-1_31.a libboost_python-gcc-mt-1_31.so libboost_python-gcc-mt-1_31.so.1.31.0 libboost_python-gcc-mt.a libboost_python-gcc-mt-d-1_31.a libboost_python-gcc-mt-d-1_31.so libboost_python-gcc-mt-d-1_31.so.1.31.0 libboost_python-gcc-mt-d.a libboost_python-gcc-mt-d.so libboost_python-gcc-mt.so libboost_python-gcc.so Unless I made a mistake in the building step which prevented libboost_python.so to be created, the first solution that comes to my mind to solve this backward compatibility problem would be to create a symlink from libboost_python.so to one of the new libraries. The question is, what would you recommend: libboost_python-gcc.so or libboost_python-gcc-mt.so (or none of the above, but....) thanks a million marco

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RE: [Boost-users] Re: install? and simple thread program.
by Duong, Sanh N. 08 Mar '04

08 Mar '04

I downloaded the latest version of Python from the website given below and ran it with "rpm --rebuild python2-2.2-2.src.rpm." Python seems to install correctly. I reset my env variables to PYTHON_ROOT=/usr and PYTHON_VERSION=2.2. Yet when I ran bjam, it would say it couldn't find the Python.h file within /usr/include/python2.2/. The directory is there, but its empty. There is an another directory for python1.5. But this version will not compile Boost correctly. Any suggestions or idea of why this is happening? Thanks. Sanh. -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of David Abrahams Sent: Monday, March 08, 2004 1:53 PM To: boost-users(a)lists.boost.org Subject: [Boost-users] Re: install? and simple thread program. "Duong, Sanh N." <SANH.N.DUONG(a)saic.com> writes: >> On Fri, 5 Mar 2004, Michael Glassford wrote: >> >>> "Duong, Sanh N." <SANH.N.DUONG(a)saic.com> wrote in message >>> >> The Boost.Python example should still work just fine, if you follow >> the instructions. bjam doesn't use the mangled library names when >> building with cross-project dependencies. It worked for me just >> now. I went into libs/python/example and did > >> bjam test > >> and everything passed. No funky linking should is needed. > > When running bjam test, in libs/python/example I'd get a lot of errors about > templates and vars not define. Let's see a few of them. > Another thing I noticed, when installing > boost with > > bjam "-sGXX=g++" "-sTOOLS=gcc" "--prefix=/home/boost_1_31_0" install > > it would say, "Skipping Boost.Python library build due to missing or > incorrect configuration couldn't find Python.h in "/include/python" Right. > When I point the PYTHON_ROOT and PYTHON_VERSION to the correct path, I'd get > a lot of errors when compiling. Is there a step I'm missing here? Hard to say without seeing the errors. My guess is that you didn't set them correctly. Did you follow the directions at http://www.boost.org/libs/python/doc/building.html ?? -- Dave Abrahams Boost Consulting www.boost-consulting.com _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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RE: [Boost-users] Re: install? and simple thread program.
by Duong, Sanh N. 08 Mar '04

08 Mar '04

> On Fri, 5 Mar 2004, Michael Glassford wrote: > >> "Duong, Sanh N." <SANH.N.DUONG(a)saic.com> wrote in message >> news:6A47CB4A48D1EA49A6F7AB618490D649069D8C3C@mcl-its-exs03.mail.saic.com... >> > All, >> > >> > Does anyone have an example of how to install boost and bjam? >> >> See the recently much improved Getting Started guide: >> http://boost.org/more/getting_started.html. > > After you follow those instructions, boost will still not work. > Even if you were right, I think you're painting with too broad a > brush here. But I think you're wrong. > You'll need to create links to all of the mangled library names. For > example, in my case all of the libraries have either "gcc" or > "gcc_1_31" mangled in. However, the examples (or more specifically > the boost.python example) assume that the libraries have unmangled > names. > The Boost.Python example should still work just fine, if you follow > the instructions. bjam doesn't use the mangled library names when > building with cross-project dependencies. It worked for me just > now. I went into libs/python/example and did > bjam test > and everything passed. No funky linking should is needed. When running bjam test, in libs/python/example I'd get a lot of errors about templates and vars not define. Another thing I noticed, when installing boost with bjam "-sGXX=g++" "-sTOOLS=gcc" "--prefix=/home/boost_1_31_0" install it would say, "Skipping Boost.Python library build due to missing or incorrect configuration couldn't find Python.h in "/include/python" When I point the PYTHON_ROOT and PYTHON_VERSION to the correct path, I'd get a lot of errors when compiling. Is there a step I'm missing here? Sanh.

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Compiler Generator Tools
by Hossein Haeri 08 Mar '04

08 Mar '04

Dear all, Who knows where I can find the compiler generation stuff in the Boost repository? I need scaner, lexical analyser, compiler, code generator, ... Are there any such tools in the Boost which can build all of the above goodies for me? TIA, --Hossein __________________________________ Do you Yahoo!? Yahoo! Search - Find what you�re looking for faster http://search.yahoo.com

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Mac OS X link problem
by Adam H. Pendleton 07 Mar '04

07 Mar '04

I am using the Boost libraries, specifically the Spirit portions, on Mac OS X Panther, using XCode. Every time I try to compile my program with the Boost libraries I get a linker error: ld: warning prebinding disabled because of undefined symbols ld: Undefined symbols: boost::throw_exception(std::exception const&) Even if I link against all the boost libraries that were created, I still can't get this program to link. The documentation talks about the libraries being compiled with or without BOOST_NO_EXCEPTIONS, but they don't indicate that the program won't link in either case. What am I doing wrong? ahp

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Boost Users: Review Schedule/Upcoming Reviews
by Jeff Garland 06 Mar '04

06 Mar '04

Below is the most recent updates to the reviews. If you have an interest in these libraries please get involved and submit a review. Library Author Review Mgr Dates Circular Buffer Jan Gaspar Pavel Vozenilek 2004 Mar 5-15 Indexed Set Joaquín M López Muñoz Pavel Vozenilek 2004 Mar 20-30 Assignment Thorsten Ottosen Tom Brinkman 2004 Apr 1-11 Serialization Robert Ramey Jeff Garland 2004 Apr 13-20 Container Traits Thorsten Ottosen Hartmut Kaiser 2004 Apr 28-May 7 Tribool Douglas Gregor - - More IO Daryle Walker - - Iostreams Jonathan Turkanis - - Output Formatters Reece Dunn - - Pointer Containers Thorsten Ottosen - - Named Params David Abrahams & Daniel Wallin - - Wave Hartmut Kaiser - -

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Changing case with regex_format
by Keith MacDonald 06 Mar '04

06 Mar '04

The following useful Perl expressions seem to have been omitted from regex_format: \l lowercase next char \u uppercase next char \L lowercase till \E \U uppercase till \E \E end case modification Was there a good reason for that? The only way I can see to implement those expressions is to take a copy of regex_format.hpp, then hack _reg_format_aux. I think that it would also be necessary to change the undocumented regex_traits class, to do upper case conversion, as it only seems to do lower casing at present. Is there an easier way? Thanks, Keith MacDonald

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install? and simple thread program.
by Duong, Sanh N. 06 Mar '04

06 Mar '04

All, Does anyone have an example of how to install boost and bjam? Does someone also have a simple program using boost and threads. Thanks in advance, Sanh

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Futures revisited
by Slawomir Lisznianski 05 Mar '04

05 Mar '04

Hello, During discussions on possible extensions to Boost.Threads, concept of Futures came up rather frequently. Below, I’d like to introduce a particular implementation available at www.rhapsodia.org of which requirements were defined as follows: 1. Provide means to register exception types with a "Future Registry". Rationale: I find it imperative that users should not have to define a list of exception types on each invocation yielding a Future object. Instead, provide the ability to register exception types with a Future Registry and bundle it with Future objects. I feel that compile time registration should be sufficient. 2. Work under the assumption that asynchronous invocations returning Futures and system threads are not coupled. In particular, Futures implementation should not relay on joining with a particular thread to perform synchronization for returning results. Rationale: Although most prevalent, the technique of joining with a particular thread to synchronize on returning result is too limiting. It implies that each task be run on a dedicated thread, specially created to handle it and destroyed to meet with a caller using a Future. Although this approach may be adequate under certain conditions, it generally tends to be expensive on system resources and disorganizes the application. For example, it’s impossible to control the number of concurrently running threads. It may also perform poorly if executed code happens to run shortly as the overhead of creating a thread and cleaning up after it may be significant. More robust approach is to use a queue and a thread pool for running tasks. This adds complexity on the synchronization side, as we can no longer rely on a lifetime of a thread to join with Future’s result. 3. Ability to utilize Futures with arbitrary code without explicit support for them. Rationale: For implementation to be widely adopted, it should be possible to turn just about any function call into a Future-armored asynchronous invocation. No explicit thread synchronization primitives should be used as well. 4. Implement using existing Boost.Threads facilities only. Rationale: Boost.Threads library provides enough support to implement Futures paradigm that meets requirements listed here. 5. STL and Boost compatible. For example, storing Futures in an STL container. Be strongly typed. Futures implementation and usage patterns must naturally coexist with STL and Boost code. Additionally, compile-time type validation is key to safer code. Attached is a sample file from Rhapsodia library showing the use of Futures. Regareds, Slawomir Lisznianski [ www.rhapsodia.org ]

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Constructor in for adjacency_matrix missing?
by Heiko Bauke 05 Mar '04

05 Mar '04

Hello, since some weeks I'm using the BGL. It's really a great library. But I'm a bit confused about the documentation for the template class adjacency_matrix. According to the BGL-book and also the online documentation there should be three constructors for adjacency_matrix: adjacency_matrix(vertices_size_type n, const GraphProperty& p = GraphProperty()) template <typename EdgeIterator> adjacency_matrix(EdgeIterator first, EdgeIterator last, vertices_size_type n, const GraphProperty& p = GraphProperty()) and template <typename EdgeIterator, typename EdgePropertyIterator> adjacency_matrix(EdgeIterator first, EdgeIterator last, EdgePropertyIterator ep_iter, vertices_size_type n, const GraphProperty& p = GraphProperty()) but actually in boost/graph/adjacency_matrix.hpp is only the constructor adjacency_matrix(vertices_size_type n_vertices) is defined. So it's not possible to construct an adjacency_matrix from a pair of iterators (as it is possible for adjacency_list). Has this constructor been removed or never been implemented? Such a constructor would be very useful for me. Another point that confuses me is that the template parameter GraphProperty for template <typename Directed = directedS, typename VertexProperty = no_property, typename EdgeProperty = no_property, typename GraphProperty = no_property, typename Allocator = std::allocator<bool> > class adjacency_matrix; seams never been used for the implementation of this class. regards, Heiko P.S. I'm using boost 1.30.0. -- -- Gute Sitten haben für die Gesellschaft mehr Wert als alle -- Berechnungen Newtons. (Friedrich II., der Große, 1712-1786) -- Supercomputing in Magdeburg @ http://tina.nat.uni-magdeburg.de -- Heiko Bauke @ http://www.uni-magdeburg.de/bauke

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RE: [Boost-users] Hash Table
by Neil Mackie 05 Mar '04

05 Mar '04

jeff suggested, >>You could also look at the STLPort hast table. I too recently wanted to use a hash table and found that neither VC++ 6 not Boost have one. I investigated STLPort thinking that I could just use a one or two .h files to get a hast table template. I carried out a number if iterations involving installing more and more STLPort files to the point that I might as well have installed the whole thing, something I did not want to do as I already have STL as provided by VC++, and Boost of which I'm using only a very small part. The outcome was that I chose another collection type rather than have two STL implementations installed (who knows what type of problems that would have caused). I understand that VC++ 7 does have a hash table implementation. You have to be very careful looking at the documentation at the Microsoft web site as they appear not to distinguish between documentation for V7 and V6. Regards, Neil J Mackie *********************************************************************************** Ofcom is the regulator for the UK communications industry, with responsibilities across television, radio, telecommunications and wireless communications services. Ofcom exists to further the interests of citizen-consumers as the communications industries enter the digital age. Ofcom has taken over the responsibilities and assumed the powers of the five former regulators it has replaced - the Broadcasting Standards Commission, the Independent Television Commission, Oftel, the Radio Authority and the Radiocommunications Agency. This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the originator of the message. This footer also confirms that this email message has been scanned for the presence of computer viruses. Any views expressed in this message are those of the individual sender, except where the sender specifies and with authority, states them to be the views of Ofcom. ***********************************************************************************

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RE: [Boost-users] Hash Table
by Ben Hutchings 04 Mar '04

04 Mar '04

Muhammad Hussain <m <mailto:mhussain@i.kyushu-u.ac.jp> <mailto:mhussain@i.kyushu-u.ac.jp> <mailto:mhussain@i.kyushu-u.ac.jp> hussain(a)i.kyushu-u.ac.jp> wrote: Is there any library in boost that provides hash table and the methods to manipulate it? No, but there are common extensions to the standard containers library (aka STL) that are included with many compilers, called hash_map and hash_set. Unfortunately there are several implementations of these which do not have quite the same interface. Ben.

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Where is the jam_src Makefile?
by Dr Mark H Phillips 04 Mar '04

04 Mar '04

Hi, I am trying to compile a bjam executable from scratch (under Linux). In the file: boost_1_31_0/tools/build/jam_src/README it says: The Makefile (UNIX, NT), build.com (VMS), Build.mpw (Mac MPW) are for bootstrapping. Once jam is built, it can rebuild itself. But I can't find the Makefile anywhere! It is not in that directory, and I can't find it anywhere else? Am I blind, or is it missing? Thanks, Mark.

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Hash Table
by Muhammad Hussain ???? ???? 04 Mar '04

04 Mar '04

Is there any library in boost that provides hash table and the methods to manipulate it? Thanks a lot in advance. Hussain

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filesystem lib and dangling symbolic links
by Andre Hentz 04 Mar '04

04 Mar '04

According to http://www.boost.org/libs/filesystem/doc/operations.htm#remove remove() is supposed to remove symbolic links. However, the source code says: if exists(ph) remove; Shouldn't it be: exists(ph) || symbolic_link_exists(ph) Best, Andre Hentz

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Boost (& Visual Studio 2003) for Dummies?
by Matthew Jankowski 03 Mar '04

03 Mar '04

Hey all, My need is to combine a program I've written with some linear algebra. I can generally do most basic tasks in C/C++, but not yet derived classes and the like. Anyway, not wanting to reinvent the wheel, my searches revealed that 'boost' might be a good source of code for some math functions I will need, essentially matrix operations. I read the getting started page http://boost.org/more/getting_started.html, all I managed to do was run the batch file in the tools/build folder, but I don't think this installed any libraries, or if it did, it didn't put them where I need them..I don't have much experience working from the command line in Windows. Boost looks good, can anyone help me get started? Thanks, Matt

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Intel C++ 8 Windows
by Lars Schouw 03 Mar '04

03 Mar '04

Did anyone get the boot libs compiled usign the Intel 8 compiler? I made it conmpile but am not sure if it works. Also did anyone have luck using it optimized for SSE2 on a P4 processor as well? Lars --------------------------------- Do you Yahoo!? Yahoo! Search - Find what you�re looking for faster.

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Boost threads bug!
by Roger Wilco 01 Mar '04

01 Mar '04

On Win32: { // Verify boost tss bug is fixed. (still present as of 1.31.0) // This bug will not trigger until application termination. boost::thread_specific_ptr<bool> tss; bool * testPtr = new bool; tss.reset(testPtr); tss.reset(NULL); // testPtr is deleted and is now invalid. tss.get() returns NULL. // When tss goes out of scope, an unpatched Boost will erroneously delete testPtr a second time. } I've posted and emailed this bug at least a dozen times now... I hope this gets through this time. This bug seems very blatant; like it would affect lots of people. Is this bug known? Is Boost threads being actively maintained? This bug has been present for at least a year.

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shared_ptr casts
by Hickman, Greg 01 Mar '04

01 Mar '04

I note that the shared_ptr casting functions have new names in the current release, but I'm just wondering why there is no longer a 'polymophic_cast' function provided? It's not a big deal to me, but I'm curious about the rationale.

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RE: [Boost-users] Re: about license
by Darryl Green 01 Mar '04

01 Mar '04

> -----Original Message----- > From: David Abrahams [mailto:dave@boost-consulting.com] [snip] > >> > If my application uses boost libraries unchanged, is it > considered a > >> > derivative work? > >> > >> Yes. > > > > Really? The ligitimacy of this stance seems questionable (but ianal > > etc). Further I did not see it as being part of the > objectives for the > > license. Quite the opposite in fact. > > Correct. IANAL either. It just seemed to me that we wouldn't have > to provide the explicit exception below unless it could be > interpreted that binaries were derivative. Ah - binaries - ok - that makes sense. > > >> > If so, does that mean that if I distribute my compiled > software, I > >> > must allow free of charge use and distribution? > >> > >> No, the license gives an explicit exemption for compiled code > >> (emphasis mine): > > > > [let me just re-insert some additioanl context here] > > ! The copyright notices in the Software and this entire statement > > ! ... > > ! must be included in all copies of the Software, in whole > or in part, > > and > >> > >> all derivative works of the Software, UNLESS SUCH COPIES > OR DERIVATIVE > >> WORKS ARE SOLELY IN THE FORM OF MACHINE-EXECUTABLE OBJECT > >> CODE GENERATED BY > >> A SOURCE LANGUAGE PROCESSOR. > > > > I took this to mean that nobody can delete/change the > copyright/license > > in the sources if they copy or produce a derivative work > but that there > > is no need to include the license in a binary distribution. > > Correct. > > > It did not occur to me that leaving the license in place somehow > > forms a viral attachment to other source in a source distribution. > > I don't know what you mean. My misunderstanding about what was the derived work in your "yes" above. The rest of my post was based on that misunderstanding. [snip] > > Whatever the conclusion I think this needs to be in the FAQ. > > Patches welcomed I'm happy to provide a patch once I'm reasonably sure I understand the license. I'm assuming an email discussion will be more productive than patches in the meantime. I have one more question that I have a proposed FAQ answer for, but my "answer" is based purely on what I think it should be, not an understanding of the law. The point that confuses me is: If a program uses boost, the binary distro doesn't need to contain the license, but it is a derivative work. As I understand it, a derivative work contains exclusive rights both the "preexisting material" author and "contributed material" author. This in turn means there must be some form of agreement as to how the derivative work can be distributed. The boost license seems to deal with that by saying that the derivative work must contain the boost license wording unless the derivative work is object code. That seems to result in a reasonably clear rule for derivative works that are not object code. What I'm not sure on is whether the grant to allow derivative works, combined with permission to omit the license wording from object code, gives the "contributing author" the right to distribute the object code "derived work" under any terms/license that author choses? Here is my proposed "patch" in a form suitable for forwarding to lawyers for "testing". Q: Does #include <boost/any_old_header.hpp> make the including file a derived work? A: No. That is use, but not derivation. But if instead of #include, you pasted in a legally significant portion of <boost/any_old_header.hpp> , that would make your program a derived work. Note that if you pasted in code from several sources, your code might become a derived work of each of those sources. Source - Beman Dawes in http://aspn.activestate.com/ASPN/Mail/Message/boost/1686928 Q: Is the object file produced by compiling a source file which contains #include <boost/any_old_header.hpp> a derived work? A: Yes. However, the license explicitly grants the right to distribute object code derivative works (the result of compiling source which includes boost files) without the boost license. Q: So I can apply my own choice of license terms to the object code? A: Yes. Is this legally and "intently" correct? Regards Darryl Green. ########################################################################## This e-mail is for the use of the intended recipient(s) only. If you have received this e-mail in error, please notify the sender immediately and then delete it. If you are not the intended recipient, you must not use, disclose or distribute this e-mail without the author's prior permission. We have taken precautions to minimise the risk of transmitting software viruses, but we advise you to carry out your own virus checks on any attachment to this message. We cannot accept liability for any loss or damage caused by software viruses. ##########################################################################

2 1

Has mailing list 'from' address changed?
by Steve Folly 28 Feb '04

28 Feb '04

I'm not catch boost-users digest anymore with my mail rules? Vol 129 issue 3 from lists.boost.org, has a date stamp of 17:01:03. I've received a second copy from www.osl.ie.edu at 17:01:50. Is this a permanent change? -- Regards, Steve.

5 5

Re: Iterator adaptor interoperability
by Kris Braun 28 Feb '04

28 Feb '04

Dave Abrahams wrote: > Your best bet is to write an type generator: > template <class Iterator> > struct simple_iterator > { > typedef boost::transform_iterator< > do_nothing< typename Iterator::value_type > > , Iterator > > type; > }; Thank you for the quick and clear reply! I'm now having a very similar problem with a slightly more complicated example (that builds on the first): template< class Iterator > struct harder_iterator { typedef simple_iterator< Iterator >::type inner_type; typedef boost::indirect_iterator< inner_type > type; static type Create( const Iterator& iter ) { return type( inner_type( iter ) ); } }; This "composite" iterator not only has problems with comparison, but assignment from non-const to const as well. Is there a way to handle this case? Thanks, Kris __________________________________ Do you Yahoo!? Yahoo! Mail SpamGuard - Read only the mail you want. http://antispam.yahoo.com/tools

2 3

building boost 1.31.0
by Greg Silverman 27 Feb '04

27 Feb '04

Hi, I have not been able to build version 1.31.0. I run bjam -sTOOLS=gcc-nocygwin Basically, I get a lot of undefined references from the linker. The linker cannot find "cpp_main", "init_unit_test_suite", and, so on. It seems to be a problem with the testing, regression testing, unit testing, etc. Greg Silverman Northrop Grumman San Jose, CA

1 0

lambda / boost usage questions
by Luis De la Parra 26 Feb '04

26 Feb '04

hello, I don't have much experience with boost, so I'm having problems getting boost lambda to work...hope someone here can point me in the right direction. I have: class Song {public: string artist( ) const { return m_artist } string title( ) const { return m_title } private: string m_artist, m_title; } typedef boost::shared_ptr<Song> pSong; vector<pSong> c; and I am trying to use lambda to find a song in c which matches a certain artist and title...something like iterator it = find_if( c.begin(), c.end(), something ) but I havn't figured out what "something" should look like I've tried find_if(begin(),end(), (_1->artist() == "a1" && _1->title = "t1" ) ); but the compiler -- or I =) -- doesn't seem to know the type of _1 --> error: base operand of `->' has non-pointer type `const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >' If I try it = find_if(begin(),end(), boost::bind(&Song::artist,_1) == "a1" ); it fails because "_1" is ambiguos (defined as lambda/placeholder and boost/arg ) using boost::lambda::bind (and not including the "normal" bind ) gives a bunch cryptic errors... I've tried several other variants with lambda / lambda::bind / boost::bind but I havn't figured it out... can anyone help me out? I'd also like to know what's the difference between boost::bind and boost::lambda::bind ? Also... is there a way to know when a lambda object is going to be constructed?, it's probably just that I don't know much about the BLL, but in cases where you have several nested lambdas and binds, I'm not sure which lambda objects will get constructed. regards, luis

3 4

bug in numeric_cast<unsigned long>, <unsigned char>, and <unsigne d int> in gcc 3.3.2
by King, William D 26 Feb '04

26 Feb '04

Hello, I am seeing a bug that the regression tests miss for numeric_cast<unsigned long> with gcc 3.3.2. Specifically, the following code is throwing an exception: double small_value = 1.25; unsigned long l=0; l = numeric_cast<unsigned long>(small_value); // throws exception! unsinged char c=0; c = numeric_cast<unsigned char>(small_value); // throws exception! I am under the impression that numeric_cast is supposed to accept losses of precision (by truncating the fractional values), and to throw exceptions only if there is a range or sign error. Is this so? This error happens only when I try to cast a value with a non-zero fraction; i.e. 1.25 breaks but 1.0 is fine. It only occurs for unsigned types -- signed int, char, and long appear to work correctly. I have found the same incorrect behavior with gcc 3.3.2 on both solaris and linux. Using sunpro on solaris, the same code runs correctly. The regression tests don't catch this, since they only test numeric_cast with integral values 1 and LONG_MAX. Any ideas? It looks like a compiler problem to me. Davis King william.d.king(a)bankofamerica.com

2 1

Boost.Test and Threads
by p.klotz＠icoserve.com 26 Feb '04

26 Feb '04

Hi After our migration from Boost 1.30.2 to Boost 1.31.0 several multithreaded tests no longer work stable. We tracked it down to the macros BOOST_UT_LOG_BEGIN and BOOST_UT_LOG_END. When one protects this macro calls with a mutex, the tests work stable again. After the investigation we found 'Support for the testing of multithreaded programs.' on the open issues list of Boost.Test. Does this mean that Boost.Test is not thread-safe at all? Do we misuse Boost.Test by calling things like BOOST_CHECK_EQUAL, BOOST_CHECK and BOOST_REQUIRE concurrently from different threads? Any clarification on this topic is welcome. Best regards, Peter.

2 1

newbie doubts in compilation process
by Gustavo Sánchez 26 Feb '04

26 Feb '04

Hi all, I am newbie in Boost libraries, and I'm specially interested in Graph Library (BGL). I'm working with VC++ 6.0 and I have a couple of questions about usign the library under this SDK. Of course I've read the Boost documentation and I know VC++ 6 doesn't pass the regresion test but I'm doubty about the compilation process. Those are the steps I followed: 1.- I did the outlined comands in getting started cd boost_1_31_0 bjam "-sTOOLS=msvc" install As result I obtained in drive C: a boost dir with "include" and "libs" subdirs and boost_date_time-vc6-mt-1_31.dll boost_date_time-vc6-mt-gd-1_31.dll boost_filesystem-vc6-mt-1_31.dll boost_filesystem-vc6-mt-gd-1_31.dll boost_regex-vc6-mt-1_31.dll boost_regex-vc6-mt-gd-1_31.dll boost_signals-vc6-mt-1_31.dll boost_signals-vc6-mt-gd-1_31.dll boost_thread-vc6-mt-gd-1_31.dll and the related .lib files. Why aren't there any .dll file of the others libraries(graph, math, type_traits...)??? 2.- I executed bjam in directory: BOOST_ROOT\libs\graph\test and what I obtained was empty directories like BOOST_ROOT\bin\boost\libs\graph\test\vector_graph_cc.test\msvc\debug just one for every test source. I supose that is due to VC++ 6.0 is not able to compile the BGL, is that the reason??? I get something similar if I executed bjam in directory: BOOST_ROOT\libs\graph\examples 3. I did that ---> A full set of tests and status tables can be run thusly on a Windows system: cd %BOOST_ROOT%\status bjam --dump-tests test >bjam.log 2>&1 start notepad bjam.log (this is just a cut of the full file ilustrating the output related to graph library) boost-test(COMPILE) "property_iter" : "libs\graph\test\property_iter.cpp" boost-test(COMPILE) "copy" : "libs\graph\test\copy.cpp" boost-test(COMPILE) "vector_graph_cc" : "libs\graph\test\vector_graph_cc.cpp" boost-test(RUN) "isomorphism" : "libs\graph\test\isomorphism.cpp" boost-test(RUN) "subgraph" : "libs\graph\test\subgraph.cpp" boost-test(COMPILE) "reverse_graph_cc" : "libs\graph\test\reverse_graph_cc.cpp" boost-test(COMPILE) "graph_concepts" : "libs\graph\test\graph_concepts.cpp" boost-test(RUN) "graph" : "libs\graph\test\graph.cpp" boost-test(COMPILE) "filtered_graph_cc" : "libs\graph\test\filtered_graph_cc.cpp" boost-test(COMPILE) "edge_list_cc" : "libs\graph\test\edge_list_cc.cpp" boost-test(COMPILE) "dijkstra_cc" : "libs\graph\test\dijkstra_cc.cpp" boost-test(COMPILE) "dfs_cc" : "libs\graph\test\dfs_cc.cpp" boost-test(RUN) "dfs" : "libs\graph\test\dfs.cpp" boost-test(COMPILE) "bfs_cc" : "libs\graph\test\bfs_cc.cpp" boost-test(RUN) "bfs" : "libs\graph\test\bfs.cpp" boost-test(COMPILE) "adj_matrix_cc" : "libs\graph\test\adj_matrix_cc.cpp" boost-test(COMPILE) "adj_list_cc" : "libs\graph\test\adj_list_cc.cpp" boost-test(RUN) "transitive_closure_test" : "libs\graph\test\transitive_closure_test.cpp" What is quite surprising to me because it's suposed VC++ can't compile all BGL, http://boost.sourceforge.net/regression-logs/cs-win32.html. Some explanation about this ??? Thanks a lot ...(I continue diving in ) --------------------------------- Antivirus Filtros antispam 6 MB gratis ¿Todavía no tienes un correo inteligente?

2 1

boost::lambda and MinGW on Windows
by Vladimir Suhoy 26 Feb '04

26 Feb '04

I have troubles compiling boost::lambda with MinGW on windows MinGW: 2.0.0-3 (yeah, I know its old) gcc: 3.2 (mingw special 20020817-1) The compiler thinks that types in boost/lambda/construct.hpp in boost::detail::destructor are undefined.. However when I put #include <boost/type_traits/remove_cv.hpp> #include <boost/type_traits/is_pointer.hpp> lines in boost/lambda/construct.hpp - then it works. _________________________________________________________________ Add photos to your messages with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail

1 0

RE: [Boost-users] newbie doubts in compilation process
by Ben Hutchings 26 Feb '04

26 Feb '04

Gustavo Sánchez <gustsanc(a)yahoo.es> wrote: [snip] 1.- I did the outlined comands in getting started cd boost_1_31_0 bjam "-sTOOLS=msvc" install As result I obtained in drive C: a boost dir with "include" and "libs" subdirs and [snip list of DLLs] and the related .lib files. Why aren't there any .dll file of the others libraries(graph, math, type_traits...)??? All their source code is included in header files as inline functions or function templates. Whatever code you use from them will automatically be compiled into your executable. I can't answer your other questions. Ben.

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RE: [Boost-users] Re: about license
by Ben Hutchings 26 Feb '04

26 Feb '04

Darryl Green <Darryl.Green(a)unitab.com.au> wrote: > Cross posted from boost-users... > > > -----Original Message----- > > From: David Abrahams [mailto:dave@boost-consulting.com] > > Sent: Wednesday, 25 February 2004 11:43 AM > > Marleny Rafferty <marleny(a)rafferty.net> writes: > > > > > Hi- > > > > > > I am considering using boost in my applications, but I have a > > > question about the boost license at > > > http://www.boost.org/LICENSE_1_0.txt . It says (edited) > > > "Permission is hereby granted, free of charge, to ... use [and] > > > reproduce ... the Software". > > > > > > It also says that any derivative works must also have the same > > > license grant. > > > > > > If my application uses boost libraries unchanged, is it > > > considered a derivative work? > > > > Yes. > > Really? The ligitimacy of this stance seems questionable (but ianal > etc). Further I did not see it as being part of the objectives for the > license. Quite the opposite in fact. (Disclaimer: IANAL, and any reputable lawyer would take plenty of time to provide you with considered advice.) My understanding is that executable or object code is a derivative work of all the source code that it is built from. So any executable that uses a library is a derivative work of that library. (There is a question as to whether this applies to header files that only define named constants and structure layouts, but little question that it applies to inline and statically-linked function definitions. The FSF asserts that using dynamically-linked function definitions also creates a derivative work.) Your source code, however, does not become a derivative work of a library that it depends on, unless you copy part or all of the library's source code into it.

1 0

shared_ptr/shared_array Question
by voodoo4 26 Feb '04

26 Feb '04

I downloaded yesterday the boost libraries (mainly for the memory libs) and to tell the truth i'm impressed with pool and smart pointers. Especially the boost smart pointers will save me from months of coding! However i have a question about smart pointers. Let's say i have these objects(the code is just an example): class Slave { Slave(); ~Slave(); }; class Master { Master(); Master(int size); ~Master(); Slave *sl; }; I want "sl" to be an array of Slaves on the free store but the sized will be determined in the constructor. With normal pointers i would write: Master::Master(int val) { sl=new Slave[val]; } Master::~Master() { delete sl; } How can i achieve the same with boost smart pointers? I've read the manual three or four times but i still don't get how to work this out. Does this have something to do with the empty ptr? I believe solution is in front of my eyes but i'm too blind(as usual) to see it...

3 5

Boost regex_replace vc6 ATL LNK1120
by Robert McKinnon 26 Feb '04

26 Feb '04

All, I am trying to incorporate the boost::regex into an ATL project that I am working on. Everything seems to work well until I try to use the regex_replace function. When I compile I get the following error: ===== Creating library Debug/yetan.lib and object Debug/yetan.exp test.obj : error LNK2001: unresolved external symbol "void __cdecl boost::throw_exception(class exception const &)" (?throw_exception@boost@@YAXABVexception@@@Z) Debug/yetan.dll : fatal error LNK1120: 1 unresolved externals Error executing link.exe. ====== I have created Non-ATL projects and everything seems to work fine. Any guidance or suggestions would be appreciated. Thanks, Rob

3 2

disabling the building of debug libraries
by Philipp Thomas 26 Feb '04

26 Feb '04

For a Linux build, I would like to only build the static and shared libraries and omit the debug versions. What's the easiest way to achieve this? Philipp -- Philipp Thomas <pth(a)suse.de> SUSE LINUX AG, Maxfeldstr. 5, D-90409 Nuremberg, Germany

1 0

Re: [Boost-users] shared_ptr/shared_array Question
by cyril.godart＠bnpparibas.com 26 Feb '04

26 Feb '04

Hi, I suggest the following code: class Master { typedef boost::smart_ptr<Slave> slave_ptr_t; typedef boost::smart_ptr<const Slave> slave_cst_ptr_t; typedef std::vector<slave_ptr_t> vec_slaves_t; typedef std::vector<slave_cst_ptr_t> vec_cst_slaves_t;//defining this one is good practice as you'll see later Master(); Master(size_t i) { slaves_.resize(i);// assume slave has an empty ctor defined. } vec_cst_slaves_t slaves() //something like const vec_cst_slaves_t& slaves() const should work { return slaves_; //nice casting that I failed to notice until someone in this list mentioned it to me }; vec_slaves_t slaves_; }; As you rightly guessed, a big advantage of this approach is that the plumbing of copy-assigment dtor and so on reduces drastically. I find it extremely convenient, even though there is a performance hit. Regards, Cyril Godart. Internet goochrules@hotmail.com@lists.boost.org - 25/02/2004 21:09 Please respond to boost-users(a)lists.boost.org Sent by: boost-users-bounces(a)lists.boost.org To: boost-users cc: Subject: Re: [Boost-users] shared_ptr/shared_array Question On Feb 25, 2004, at 12:27 PM, voodoo4 wrote: > I downloaded yesterday the boost libraries (mainly for the memory > libs) and > to tell the truth i'm impressed with pool and smart pointers. > Especially the boost smart pointers will save me from months of coding! > However i have a question about smart pointers. > > Let's say i have these objects(the code is just an example): > > class Slave > { > Slave(); > ~Slave(); > }; > > class Master > { > Master(); > Master(int size); > ~Master(); > > Slave *sl; > }; > > I want "sl" to be an array of Slaves on the free store but the sized > will be > determined in the constructor. > > With normal pointers i would write: > > Master::Master(int val) > { > sl=new Slave[val]; > } > > Master::~Master() > { > delete sl; > } > > > How can i achieve the same with boost smart pointers? I have no idea (see below). > I've read the manual three or four times but i still don't get how to > work > this out. > Does this have something to do with the empty ptr? > I believe solution is in front of my eyes but i'm too blind(as usual) > to see > it... > I don't think you're using the right tool for the job. From what I know, smart pointers should be used when you have one object, here you (potentially) have many. I think what you really want to do here is to use a container class like stl::list or stl::vector to contain your slave objects. If you still want to use smart pointers, I guess you could use a list of smart pointers, but there's really no point for that if your slave class is properly coded (for instance, has a ctor, copy ctor, virtual dtor, and operator=). --MP _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users This message and any attachments (the "message") is intended solely for the addressees and is confidential. If you receive this message in error, please delete it and immediately notify the sender. Any use not in accord with its purpose, any dissemination or disclosure, either whole or partial, is prohibited except formal approval. The internet can not guarantee the integrity of this message. BNP PARIBAS (and its subsidiaries) shall (will) not therefore be liable for the message if modified. --------------------------------------------- Ce message et toutes les pieces jointes (ci-apres le "message") sont etablis a l'intention exclusive de ses destinataires et sont confidentiels. Si vous recevez ce message par erreur, merci de le detruire et d'en avertir immediatement l'expediteur. Toute utilisation de ce message non conforme a sa destination, toute diffusion ou toute publication, totale ou partielle, est interdite, sauf autorisation expresse. L'internet ne permettant pas d'assurer l'integrite de ce message, BNP PARIBAS (et ses filiales) decline(nt) toute responsabilite au titre de ce message, dans l'hypothese ou il aurait ete modifie.

2 1

RE: [Boost-users] Re: about license
by Darryl Green 26 Feb '04

26 Feb '04

Cross posted from boost-users... > -----Original Message----- > From: David Abrahams [mailto:dave@boost-consulting.com] > Sent: Wednesday, 25 February 2004 11:43 AM > Marleny Rafferty <marleny(a)rafferty.net> writes: > > > Hi- > > > > I am considering using boost in my applications, but I have > a question > > about the boost license at > http://www.boost.org/LICENSE_1_0.txt . It > > says (edited) > "Permission is hereby granted, free of charge, to ... > > use [and] reproduce ... the Software". > > > > It also says that any derivative works must also have the > same license > > grant. > > > > If my application uses boost libraries unchanged, is it considered a > > derivative work? > > Yes. Really? The ligitimacy of this stance seems questionable (but ianal etc). Further I did not see it as being part of the objectives for the license. Quite the opposite in fact. > > > If so, does that mean that if I distribute my compiled software, I > > must allow free of charge use and distribution? > > No, the license gives an explicit exemption for compiled code > (emphasis mine): [let me just re-insert some additioanl context here] ! The copyright notices in the Software and this entire statement ! ... ! must be included in all copies of the Software, in whole or in part, and > > all derivative works of the Software, UNLESS SUCH COPIES OR DERIVATIVE > WORKS ARE SOLELY IN THE FORM OF MACHINE-EXECUTABLE OBJECT > CODE GENERATED BY > A SOURCE LANGUAGE PROCESSOR. > I took this to mean that nobody can delete/change the copyright/license in the sources if they copy or produce a derivative work but that there is no need to include the license in a binary distribution. It did not occur to me that leaving the license in place somehow forms a viral attachment to other source in a source distribution. It potentially makes this license incompatible with the intent of other (open and closed) source licenses eg. // some_gpled_source_file.cpp // this file is distributed under the gpl // changed some stuff so we use boost libs #include <some_boost_lib> // oops - now it is some boost/gpl hybrid?????? I thought avoiding this sort of thing was precisely why the boost license was developed. I also thought this interpretation of "derived work" was somewhat contentious anyway. In a commercial context, this interpretation appears to make this license hopeless - anyone obtaining a copy of source code which uses boost (which you appear to be claiming is automatically a derivative work), appears to be free to do what they like with it. It is hardly reasonable that this occur if a company distributes source code with some particular intent/license for its use. That is even without considering the issue of copies obtained without the company/authors permission, whether the copy was obtained accidentally or criminally, and then redistributed. I'm keen to stop people copying my commercial executables, but I'm a lot more keen to stop them running off with the source code! A bit of digging through the archives finds http://aspn.activestate.com/ASPN/Mail/Message/boost/1686928 Which seems to explain why I thought the intent was what I understood it to be. Whatever the conclusion I think this needs to be in the FAQ. Regards Darryl Green. ########################################################################## This e-mail is for the use of the intended recipient(s) only. If you have received this e-mail in error, please notify the sender immediately and then delete it. If you are not the intended recipient, you must not use, disclose or distribute this e-mail without the author's prior permission. We have taken precautions to minimise the risk of transmitting software viruses, but we advise you to carry out your own virus checks on any attachment to this message. We cannot accept liability for any loss or damage caused by software viruses. ##########################################################################

2 1

Dynamically resize matrix when inserting more elements
by Lars Schouw 26 Feb '04

26 Feb '04

Guys I want to use the boost matrix and found out that I have to know the size of the matrix when I construct it. (except from resizing and loosing my data). Is there any way I can add more information to a matrix and in the samt time resize it on the fly when more memory is needed? Regards Lars Schouw Tokyo --------------------------------- Do you Yahoo!? Get better spam protection with Yahoo! Mail

1 0

RE: [Boost-users] shared_ptr/shared_array Question
by Mark Storer 26 Feb '04

26 Feb '04

I'd go with scoped_array<> by default, and only go with shared_array<> if you need to share OWNERSHIP of that array. This master/slave example doesn't give enough context to make the choice apparent. PS: There's a bug in your original code: > Master::~Master() > { > delete sl; > } If you use the [] version of new, you should use the [] version of delete: Master::~Master() { delete[] sl; } Otherwise, many implementations of 'delete' will only call the destructor of the first element in the array, and may or may not free up the entire block of memory. Some implementations may actually clean everything up properly, but I wouldn't count on it if I were you. --Mark Storer Software Engineer Cardiff Software #include <disclaimer> typdef std::disclaimer<Cardiff> Discard;

1 0

Host IP changing Thursday
by Beman Dawes 26 Feb '04

26 Feb '04

The system administrators at Indiana University are planning to change the Boost mailing lists to a new host IP address Thursday. Although the changeover itself will happen very quickly, it will take some time for the DNS change to propagate. Boost's DNS usually specifies 6 hour refreshes and 12 hour "Time to Live". We will cut that to 1 hour each from now until it is clear the change is working well. So you should see no more than a two hour outage. The last time we did something like this it went pretty smoothly, but a few people had trouble with cached copies of the IP address for a few days. Anyhow, be aware that change is coming Thursday, and that mailing list response time will be longer than usual during the changeover. Thanks, --Beman

1 0

Re: [Boost-users] boost::bind placeholders and MSVC .NET 2003 and .pch
by Vladimir Suhoy 25 Feb '04

25 Feb '04

>Could you please remove the " && BOOST_MSVC <= 1300" version check from >line >41 of boost/bind/placeholders.hpp and tell us whether this fixes the >problem? Yes, it does. Everything works right even with .pch turned on. _________________________________________________________________ Tired of spam? Get advanced junk mail protection with MSN 8. http://join.msn.com/?page=features/junkmail

2 1

Re: [Boost-users] Counting matches with Regex V4
by john.wismar＠autozone.com 25 Feb '04

25 Feb '04

Earlier, I wrote: > > <Using VC7.0> > > I'm converting to V4 of Regex, and I thought I might be able to > count regex matches using this snippet: <snip> > boost::sregex_iterator itBegin(first, last, e); > boost::sregex_iterator itEnd; > ptrdiff_t pd = std::distance(itBegin, itEnd); > > I get these errors: > > xutility(312) : error C2665: 'std::_Iter_cat' : none of the 12 overloads > can convert parameter 1 from type 'boost::sregex_iterator' <snip different _Iter_cat overloads taking integral types> > Anyone have any thoughts? Is it a VC7.0 issue? Is there a better or > different way of doing the same thing? I should have mentioned that I'm using boost 1.31.0. After some further research, I found that this DOES appear to be a VC7.0-only problem. It doesn't happen in VC7.1, notably. The problem seems to be with VC7.0's implementation of the standard library. In particular, there's another overload of std::_Iter_cat that takes a std::iterator as a parameter; this overload wasn't considered by the compiler when it generated the error message above. It looks like instead of relying on iterators to define typedefs for iterator_category, value_type, et al., the library assumes that an iterator must actually derive from std::iterator. This assumption has been removed from the library implementation in VC7.1. Given all of this, it seems like my options are to modify my copy of regex_iterator.hpp, modify my copy of <xutility>, or hope that someone has a third option. (Upgrading to vc7.1 is not an option this week. :-) -------------------------------- John Wismar jwismar(a)midsouth.rr.com ------------------------------------------------------------------------ The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.

2 2

regex_replace to replace a number?
by mike.duong＠adelphia.net 25 Feb '04

25 Feb '04

Hi, I am a newbie to regex. Can anyone please help? I am trying to replace $number with a number 2 but instead it looks for argument number 12. What is the format or escape sequence format_string variable needs to be? regex e("(\\$number)"); const char* format_string = "(?12)"; regex_replace(out, file_stream.begin(), file_stream.end(), e, format_string, match_default | format_all); Thanks, Mike

2 1

regex_replace to replace a specify string
by mike.duong＠adelphia.net 24 Feb '04

24 Feb '04

Hi, Can someone please help? I would like to replace the match (*) with raw data. Is this possible? regex_replace(out, file_stream.begin(), file_stream.end(), my_regex, "(?12)", match_default | format_all); How can I replace the match with a number 2? I've tried difference combination of escape character before the 2 such as (?1\\d2) but it doesn't seems to work. Thanks, Mike

1 0

boost::bind placeholders and MSVC .NET 2003 and .pch
by Vladimir Suhoy 24 Feb '04

24 Feb '04

I have linker errors using bind placeholders. The problem is when it is used in more than one .cpp file, and precompiled headers are on (as usual - created in stdafx.cpp and used in other modules) the linker says following: error LNK2005: "class boost::arg<1> `anonymous namespace'::_1" (?_1@?A0x51895292@@3V?$arg@$00@boost@@A) already defined in jc.obj When precompiled headers are off, everything works right. _________________________________________________________________ Add photos to your messages with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail

2 1

Re: [Boost-users] Getting vertices names.
by Maxx Sloyko 24 Feb '04

24 Feb '04

Hi there! Here is my piece of code, where the error raises: void MyGraph::Load( string filename ) { using namespace boost; graph_traits<GraphvizDigraph>::vertex_iterator i; GraphvizDigraph g; read_graphviz(filename, g); graph_property<GraphvizDigraph, graph_name_t>::type& name = get_property( g, graph_name ); Name( name ); boost::property_map<boost::GraphvizDigraph, boost::vertex_attribute_t>::type& va = boost::get(boost::vertex_attribute, g); boost::property_map< GraphvizDigraph, vertex_name_t>::type& vn = get(vertex_name, g); /* First, lets load all needed properties for vertices */ for(i = vertices(g).first; i != vertices(g).second; ++i ) { map<string, string>& m = va[(*i)]; for( std::map<string, string>::const_iterator p_key = m.begin(); p_key != m.end(); ++p_key ) { std::cout<<vn[(*i)]<<endl; /* ^^^^ this is the line where the problem arises. he thing is to make the following line work (first argument is std::string ), but there was an error here and i decided to test like this. */ SetObjAttribute( vn[(*i)], const_cast<std::string&>(p_key->first), const_cast<std::string&>(p_key- >second) ); } } } Jeremy Siek <jsiek(a)osl.iu.edu>: > Hi Maxx, > > From what you've posted, I can't tell what the problem is. > If you post a short but complete program exhibiting the problem > I'll take a look. > > Cheers, > Jeremy > > On Feb 24, 2004, at 8:42 AM, Maxx Sloyko wrote: > > > Hi there! > > > > May be I'm asking something unbeleivably stupid, but anyway here is my > > problem. > > I need to get the names of all vertices in the graph (It is > > GraphvizDigraph), so > > ---------------------------------------------------- > > using namespace boost; > > property_map< GraphvizDigraph, > > vertex_name_t>::type& > > vn = get(vertex_name, g); > > graph_traits<GraphvizDigraph>::vertex_iterator i; > > > > for(i = vertices(g).first; i != vertices(g).second; ++i ) > > { > > std::cout<< vn[*i]<<endl; > > } > > ---------------------------------------------------- > > > > And here is the error I got: > > ---------------------------------------------------- > > c:\Documents and Settings\MAKC\My Documents\Visual Studio > > Projects\Graph\MyGraph.cpp(61) : error C2679: binary '<<' : no operator > > found which takes a right-hand operand of > > type > > 'boost::vec_adj_list_any_vertex_pa::bind_<Tag,Graph,Property>::value > > _type' (or there is no acceptable conversion) > > with > > [ > > Tag=boost::vertex_name_t, > > Graph=boost::detail::subgraph_any_pmap::bind_<boost:: > > vertex_name_t,boost: > > :GraphvizDigraph,boost::detail::vertex_property_map<boost:: > > GraphvizDigrap > > h,boost::vertex_name_t>::Property>::Graph, > > > > Property=boost::detail::vertex_property_map<boost::detail:: > > subgraph_any_p > > map::bind_<boost::vertex_name_t,boost::GraphvizDigraph,boost::detail:: > > ver > > tex_property_map<boost::GraphvizDigraph,boost::vertex_name_t>:: > > Property>: > > :Graph,boost::vertex_name_t>::Property > > ] > > ----------------------------------------------------- > > > > > > Since this code is almost "CopyPasted" from the library example, > > my beleif is that it should work. At what point I have to change my > > worldview? :) > > > > Thanks in advance. > > > > > > ------------------------------------- > > |your sincerely, Maxx, | > > | mailto:maxxua@pisem.net | > > ------------------------------------- > > _______________________________________________ > > Boost-users mailing list > > Boost-users(a)lists.boost.org > > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > > _______________________________________________ > Jeremy Siek <jsiek(a)osl.iu.edu> > http://www.osl.iu.edu/~jsiek > Ph.D. Student, Indiana University Bloomington > C++ Booster (http://www.boost.org) > Office phone: (812) 856-1820 > _______________________________________________ > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > ------------------------------------- |your sincerely, Maxx, | | mailto:maxxua@pisem.net | -------------------------------------

2 1

Getting vertices names.
by Maxx Sloyko 24 Feb '04

24 Feb '04

Hi there! May be I'm asking something unbeleivably stupid, but anyway here is my problem. I need to get the names of all vertices in the graph (It is GraphvizDigraph), so ---------------------------------------------------- using namespace boost; property_map< GraphvizDigraph, vertex_name_t>::type& vn = get(vertex_name, g); graph_traits<GraphvizDigraph>::vertex_iterator i; for(i = vertices(g).first; i != vertices(g).second; ++i ) { std::cout<< vn[*i]<<endl; } ---------------------------------------------------- And here is the error I got: ---------------------------------------------------- c:\Documents and Settings\MAKC\My Documents\Visual Studio Projects\Graph\MyGraph.cpp(61) : error C2679: binary '<<' : no operator found which takes a right-hand operand of type 'boost::vec_adj_list_any_vertex_pa::bind_<Tag,Graph,Property>::value _type' (or there is no acceptable conversion) with [ Tag=boost::vertex_name_t, Graph=boost::detail::subgraph_any_pmap::bind_<boost::vertex_name_t,boost: :GraphvizDigraph,boost::detail::vertex_property_map<boost::GraphvizDigrap h,boost::vertex_name_t>::Property>::Graph, Property=boost::detail::vertex_property_map<boost::detail::subgraph_any_p map::bind_<boost::vertex_name_t,boost::GraphvizDigraph,boost::detail::ver tex_property_map<boost::GraphvizDigraph,boost::vertex_name_t>::Property>: :Graph,boost::vertex_name_t>::Property ] ----------------------------------------------------- Since this code is almost "CopyPasted" from the library example, my beleif is that it should work. At what point I have to change my worldview? :) Thanks in advance. ------------------------------------- |your sincerely, Maxx, | | mailto:maxxua@pisem.net | -------------------------------------

2 1

Streaming boost::optional yields inconsistent output in gcc 3.2.3
by Eelis van der Weegen 24 Feb '04

24 Feb '04

Hi, I defined the following operator to stream optional<char>'s: std::ostream & operator<< (std::ostream & os, boost::optional<char> const & op) { if (op) os << *op; else os << '_'; return os; } Now, when I use: boost::optional<char> a ('a'); std::cout << a; 'a' is printed like I expected. However, when I use: std::ostream_iterator<boost::optional<char> > oi (std::cout); *oi = a; '1' is printed and my operator is apparently ignored (I expected another 'a'). Is this a gcc (3.2.3) issue or a boost issue? And in any case: is there a workaround? Thanks, Eelis

2 2

Re: [Boost-users] Boost Newbie: Boost Libraries notincluded .....Linker Error
by Mohammed Abbas 24 Feb '04

24 Feb '04

Oooops thanks for the thought: Im running gcc on Windows XP Home Edition. -- --------- Original Message --------- DATE: Mon, 23 Feb 2004 07:50:23 From: Darren Cook <darren(a)dcook.org> To: Boost Users mailing list <boost-users(a)lists.boost.org> Cc: >> Could anyone send me a copy of the library files that aer produced... > >You didn't say which platform. > >>>I had built the Boost Libraries and was expecting that the sample > >>simple_ls program to work. Unfortunately as I compiled it I > >>had received a million plus errors due to the Linker Error. > >>.... > >>P.S. The Library folder for Boost is Empty and I includeded the Boost >Include Directory in the gcc path. > >If you post the first 4-5 and last 4-5 lines of errors (and show the full >compiler command you are using) someone may be able to help then. > >Darren > > >_______________________________________________ >Boost-users mailing list >Boost-users(a)lists.boost.org >http://lists.boost.org/mailman/listinfo.cgi/boost-users > ____________________________________________________________ Find what you are looking for with the Lycos Yellow Pages http://r.lycos.com/r/yp_emailfooter/http://yellowpages.lycos.com/default.as…

1 0

Iterator adaptor interoperability
by Kris Braun 24 Feb '04

24 Feb '04

Hello, I've spent the day trying to get my iterators working after upgrading to 1.31.0. I'm almost there, but I can't seem to get const and non-const versions to compare with each other. I've tried about everything I can think of, so I'll just post a minimal test that fails in hopes that someone can see my mistake: #include <iostream> #include <list> #include <boost/iterator/transform_iterator.hpp> template< class Type > struct do_nothing { typedef Type result_type; result_type operator( )( const Type& t ) { return t; } }; template< class Iterator > class simple_iterator : public boost::transform_iterator< do_nothing< typename Iterator::value_type >, Iterator > { private: typedef boost::transform_iterator< do_nothing< typename Iterator::value_type >, Iterator > super_t; public: simple_iterator( void ) { } simple_iterator( Iterator iter ) : super_t( iter ) { } template< class Iterator2 > simple_iterator( const simple_iterator< Iterator2 >& iter ) : super_t( iter.base( ) ) { } }; typedef std::list< int > ListType; typedef simple_iterator< ListType::iterator > iterator; typedef simple_iterator< ListType::const_iterator > const_iterator; struct Foo { iterator begin( void ) { return iterator( m.begin( ) ); } const_iterator end( void ) const { return const_iterator( m.end( ) ); } ListType m; }; void foo( void ) { Foo f; for( iterator i = f.begin( ); i != f.end( ); ++i ) { } } which on VC7.1 yield src\util\test.cpp(53) : error C2678: binary '!=' : no operator found which takes a left-hand operand of type 'iterator' (or there is no acceptable conversion) Any help would be much appreciated! Cheers, Kris __________________________________ Do you Yahoo!? Yahoo! Mail SpamGuard - Read only the mail you want. http://antispam.yahoo.com/tools

2 1

Problem building boost 1.31 on True64 Unix
by Wenzel, Hans 23 Feb '04

23 Feb '04

Hi all, I'm trying to build the complete boost 1.31 on a True64 Unix V5.1A machine using the Compaq C++ V6.5-014 compiler. After invoking bjam, the compiler hangs on the last command seen below. What can I do? cxx -ptr "bin/boost/libs/filesystem/build/libboost_filesystem.so/tru64cxx65/r elease"/cxx_repository -noimplicit_include -c -std strict_ansi -nopure_cname -m sg_display_number -msg_disable 186,450,1115 -DNDEBUG -DNDEBUG -DBOOST_FILESYSTE M_DYN_LINK=1 -O2 -inline all -I"bin/boost/libs/filesystem/build" -I"/usr/loc al/boost_1_31_0" -I"/usr/local/boost_1_31_0" -o "bin/boost/libs/filesystem/bui ld/libboost_filesystem.so/tru64cxx65/release/operations_posix_windows.o" "/usr/ local/boost_1_31_0/libs/filesystem/build/../src/operations_posix_windows.cpp " Best regards HansW

1 0

Re: [Boost-users] Boost Newbie: Boost Libraries not included .....Linker Error
by Mohammed Abbas 22 Feb '04

22 Feb '04

Could anyone send me a copy of the library files that aer produced when building the boost libraries. Im not getting anything in my directory and Im already late in my project proposal. Yours MJ --------- Original Message --------- DATE: Fri, 20 Feb 2004 14:03:27 From: "Mohammed Abbas" <mjabbas(a)lycos.com> To: boost-users(a)lists.boost.org Cc: >Hi, > >Im a newbie in C++ just barely getting to grips with the Boost Libraries. I had built the Boost Libraries and was expecting that the sample simple_ls program to work. Unfortunately as I compiled it I had received a million plus errors due to the Linker Error. > >Please tell me whats wrong???????????? > >P.S. The Library folder for Boost is Empty and I includeded the Boost Include Directory in the gcc path. > >Yours, > >MJ > > >____________________________________________________________ >Find what you are looking for with the Lycos Yellow Pages >http://r.lycos.com/r/yp_emailfooter/http://yellowpages.lycos.com/default.as… >_______________________________________________ >Boost-users mailing list >Boost-users(a)lists.boost.org >http://lists.boost.org/mailman/listinfo.cgi/boost-users > ____________________________________________________________ Find what you are looking for with the Lycos Yellow Pages http://r.lycos.com/r/yp_emailfooter/http://yellowpages.lycos.com/default.as…

2 1

tokenizer and wstring with VC7.1
by Douglas G. Hanley 22 Feb '04

22 Feb '04

Has anybody managed to get tokenizer working for wide characters with VC7.1 (boost version 1.31.0)? The following example works fine... typedef tokenizer<char_separator<std::string::value_type>, std::string::const_iterator, std::string> MyTokenizer; const char_separator<std::string::value_type> sep("a"); MyTokenizer token(std::string("abacadaeafag"), sep); for (MyTokenizer::const_iterator it = token.begin(); it != token.end(); ++it) { std::cout << *it; } ...while the following example produces no output... typedef tokenizer<char_separator<std::wstring::value_type>, std::wstring::const_iterator, std::wstring> MyTokenizer; const char_separator<std::wstring::value_type> sep(L"a"); MyTokenizer token(std::wstring(L"abacadaeafag"), sep); for (MyTokenizer::const_iterator it = token.begin(); it != token.end(); ++it) { std::wcout << *it; } Cheers, Douglas.

3 5

Tokenizer Problem
by Thomas Johnson 22 Feb '04

22 Feb '04

Can anyone explain to me why the code below prints: Token: A1B21 Token: A1B Token: : Token: 12 Instead of printing: Token: A1B2 Token: : Token: 12 Token: A1B Token: : Token: 12 Using boost 1.31.0 Thanks! ---Cut here--- #include <boost/tokenizer.hpp> #include <iostream> int main() { boost::char_separator<char> sep("", ":", boost::keep_empty_tokens); boost::tokenizer< boost::char_separator<char> > stringTok(std::string("A1B2:12"),sep); boost::tokenizer< boost::char_separator<char> >::iterator tokIter=stringTok.begin(); while(tokIter!=stringTok.end()) { std::cout << "Token: " << (*tokIter) << "\n"; tokIter++; } boost::tokenizer< boost::char_separator<char> > stringTok2(std::string("A1B:12"),sep); boost::tokenizer< boost::char_separator<char> >::iterator tokIter2=stringTok2.begin(); while(tokIter2!=stringTok2.end()) { std::cout << "Token: " << (*tokIter2) << "\n"; tokIter2++; } } ---Cut Here--- -- Thomas Johnson <thomas(a)unifiedconsulting.com>

2 1

Boost Newbie: Boost Libraries not included ..... Linker Error
by Mohammed Abbas 20 Feb '04

20 Feb '04

Hi, Im a newbie in C++ just barely getting to grips with the Boost Libraries. I had built the Boost Libraries and was expecting that the sample simple_ls program to work. Unfortunately as I compiled it I had received a million plus errors due to the Linker Error. Please tell me whats wrong???????????? P.S. The Library folder for Boost is Empty and I includeded the Boost Include Directory in the gcc path. Yours, MJ ____________________________________________________________ Find what you are looking for with the Lycos Yellow Pages http://r.lycos.com/r/yp_emailfooter/http://yellowpages.lycos.com/default.as…

2 1

Semaphore and barriers for boost-threads?
by Craig Rodrigues 20 Feb '04

20 Feb '04

Hi, I am new to Boost, and like what I see. I hope to be able to use more Boost libraries in the C++ projects that I work on. Would it be a good thing to add semaphore and barrier classes to Boost Threads? For semaphores, having something analogous to the POSIX functions sem_wait() and sem_post() would be nice. For barriers, having something analogous to pthread_barrier_wait() would be nice. It is not very hard to roll your own versions of these primitives using boost::condition and boost::mutex classes, but it would be nice to have them in a library. Any opinions? Thanks. -- Craig Rodrigues http://crodrigues.org rodrigc(a)crodrigues.org

5 12

Counting matches with Regex V4
by john.wismar＠autozone.com 20 Feb '04

20 Feb '04

<Using VC7.0> I'm converting to V4 of Regex, and I thought I might be able to count regex matches using this snippet: boost::regex e; std::string::const_iterator first, last; //Initialize first, last boost::sregex_iterator itBegin(first, last, e) boost::sregex_iterator itEnd; ptrdiff_t pd = std::distance(itBegin, itEnd); I get these errors: xutility(312) : error C2665: 'std::_Iter_cat' : none of the 12 overloads can convert parameter 1 from type 'boost::sregex_iterator' xutility(127): could be 'std::_Int_iterator_tag std:: _Iter_cat(std::_Bool)' xutility(133): or 'std::_Int_iterator_tag std:: _Iter_cat(char)' xutility(139): or 'std::_Int_iterator_tag std:: _Iter_cat(signed char)' xutility(145): or 'std::_Int_iterator_tag std:: _Iter_cat(unsigned char)' xutility(151): or 'std::_Int_iterator_tag std:: _Iter_cat(short)' xutility(157): or 'std::_Int_iterator_tag std:: _Iter_cat(unsigned short)' xutility(163): or 'std::_Int_iterator_tag std:: _Iter_cat(int)' xutility(169): or 'std::_Int_iterator_tag std:: _Iter_cat(unsigned int)' xutility(175): or 'std::_Int_iterator_tag std:: _Iter_cat(long)' xutility(181): or 'std::_Int_iterator_tag std:: _Iter_cat(unsigned long)' xutility(188): or 'std::_Int_iterator_tag std::_Iter_cat (__int64)' xutility(194): or 'std::_Int_iterator_tag std:: _Iter_cat(unsigned __int64)' while trying to match the argument list '(boost::sregex_iterator)' myfile.h(47) : see reference to function template instantiation 'ptrdiff_t std::distance(_InIt,boost::sregex_iterator)' being compiled with [ _InIt=boost::sregex_iterator ] Anyone have any thoughts? Is it a VC7.0 issue? Is there a better or different way of doing the same thing? -------------------------------- John Wismar jwismar(a)midsouth.rr.com ------------------------------------------------------------------------ The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.

1 0

[Graph] What can I do with null_vertex?
by Douglas Gregor 20 Feb '04

20 Feb '04

There are no semantics for null_vertex. I assume I can copy it, but can I compare it against other vertex descriptors via == and !=? Is it always different from "real" vertex descriptors? Doug

2 1

Determining offset of regex syntax errors
by Keith MacDonald 20 Feb '04

20 Feb '04

Members of class reg_expression know where they are up to while compiling, but don't include that information when they throw. It can be pretty daunting to get the "Invalid regular expression" error message, with no indication of where to start looking, so I'd like to be more helpful. Given the character offset from the start of the RE, I can put the cursor there. Any suggestions as to how to obtain that information? Thanks, Keith MacDonald

2 3

Redirecting the detailed test report
by Hermann Oliveira Rodrigues 20 Feb '04

20 Feb '04

Hi, Recently we have decided to use the Boost Test libraries to provide automated tests to our project. To help with the test result visualization, we created an utility to generate HTML pages from Boost test reports (as generated by -- report_level=detailed). In the begining of implementation, the amount of tests was small and we could just cut-and-paste the test report to a file used as the input of out in-house HTML generator. Now, the amount of tests increased and cutting-and-pasting the report become a pain. So the question: How can we send the test report to a separated file? We used unit_test_log::instance().set_log_stream( stream ) in the definition of test_suite* init_unit_test_suite( int argc, char* argv[] ) to redirect the test log and it worked fine. However, unit_test_result::instance().detailed_report( stream ) can not be used in the same way. We can not simply redirect the test output to a file (using ">") because our application prints lots of information during execution and is pretty hard to change this behaviour. Thanks in advance.

2 2

Overloading New and Delete to track memory in shared_ptr.
by Joshua Little 19 Feb '04

19 Feb '04

Hi again, Well I'm making pretty good progress in learning proper way to use shared_ptr's but I'm still a little nervous about leaking memory, especially if I manage to do something I'm not supposed to do and don't recognize that a memory leak may be occuring. I've used the overloading new/delete before to help track memory leaks and I was wondering if that would be possible with shared_ptrs. I tried my old header files with and saw tons of leaks but I think its because my New that I use logs the creation to a Tracer class but since the Delete happens in the shared_ptr, its not using the overloaded Delete that removes stuff from the tracer when its deleted. I've looked around and found some examples of making a custom deleter to pass into the shared ptr when creating a new shared_ptr which should work but I have some worries about it. I'm not quite sure what the recommended way of doing this would be. About the only thing I can think of would be to have two different deleters which would be conditionally compiled something like this : //Overloaded New to log allocation to a tracer, theres a define to add the file and line number to the new call #ifndef NDEBUG void * operator new (unsigned int size, char const * file, int line) { void * p = new (size); if (Tracer::Ready) NewTrace.Add (p, file, line); return p; } struct deleter { void operator() (void * p) const { if (Tracer::Ready) NewTrace.Remove(p); delete p; } } #else struct deleter { void operator() (void * p) const { delete p; } } #endif //NewTrace is an extern'd object in the Main.cpp file So then I'd pass in the deleter to the shared_ptr and then whichever deleter was defined would be passed into the shared_ptr. I'm kinda cobbling together a few different things I've seen but I think that with this I could include the header file in the .cpp file of any class that I want to track the memory of and then just make sure I send in the deleter when I reset or make a new shared ptr. For instance in my LoggerFactory.cpp file : #include "../include/Logger.hpp" #include "../include/LoggerFactory.hpp" #include "../include/dbnew.hpp" LoggerMap LoggerFactory::loggers; boost::shared_ptr<Logger> LoggerFactory::getInstance(std::string& logger) { boost::shared_ptr<Logger>& TheLoggerRef = loggers[logger]; if(!TheLoggerRef.get()) TheLoggerRef.reset(new Logger(logger),deleter()); return TheLoggerRef; } So then the dbnew would define the deleter to use for the Logger object, if it was a debug build it would also create the overloaded new operator, define the _FILE_ and _LINE_ macros to send into the new New operator. And if its not the debug build then essentially the normal deleter is given to the shared_ptr and everything procedes as normal. Is this a good way to go about adding memory leak checking? I've looked for a new memory leak checkers like valgrind but thats only available on Linux and I'm stuck on windows.. and all the memory checkers I've been able to find only support VC++ or borland and I use gcc. So I would like a nice simple way that I can drop right in, which is what I'm going for with the overloading new and the custom deleter. Joshua.

2 1

Concurrency support based on Boost.Threads
by Slawomir Lisznianski 19 Feb '04

19 Feb '04

License: Public Domain URL: http://www.rhapsodia.org Depends on: Boost, STL Code maturity: Beta Target platform: Any with C++ compiler. C++ compilers verified to work on: GNU g++ 3.2.x, Visual C++ 6 Service Pack 5 Description: Rhapsodia is a collection of header files implementing commonly used classes in concurrent C++ programming. Library mainly consists of implementations of: - Channel (bounded, unbounded and priority queue), - Barrier (multi-party synchronization) - Executor (replacement for direct use of thread creation and management API). Your critiques, suggestions or usage questions are much welcomed. Slawomir Lisznianski; [ www.rhapsodia.org ]

1 0

RE: [Boost-users] Mathematical expressions with containers
by Hurd, Matthew 19 Feb '04

19 Feb '04

> Russell Hind > Subject: [Boost-users] Mathematical expressions with containers > > Currently I'm doing more and more mathematical calculations on > containers, and wondered if there is any library out there that allows > containers to be placed in expressions without having to use > transform/for_each etc. > > e.g. > > std::vector<std::complex<double> > V1; > std::vector<std::complex<double> > V2; > double C1, C2; > > ... > > std::vector<std::complex<double> > Result; > > Result = C1 + V2 / (V1 * C2); > > while would be equivalent to (assuming Result has been resized) > > (I'm currently using a mixture of transforms and spirit::phoenix > (because lambda doesn't work with my compiler)) > > transform(V1.begin(), V1.end(), V2.begin(), > Result.begin(), > C1 + phoenix::arg2 / (phoenix::arg1 * C2)); > > Or something to this effect that will aid with this. > > Cheers > > Russell Seems to my quick glance you are asking for some vector operations. Have you looked at boost's ublas? Regards, Matt Hurd. IMPORTANT: The information contained in this email and/or its attachments is confidential. If you are not the intended recipient, please notify the sender immediately by reply and immediately delete this message and all its attachments. Any review, use, reproduction, disclosure or dissemination of this message or any attachment by an unintended recipient is strictly prohibited. Neither this message nor any attachment is intended as or should be construed as an offer, solicitation or recommendation to buy or sell any security or other financial instrument. Neither the sender, his or her employer nor any of their respective affiliates makes any warranties as to the completeness or accuracy of any of the information contained herein or that this message or any of its attachments is free of viruses.

3 2

Any one used boost with comeau c++ compiler for visual c++.net 2003?
by Ben Polen 18 Feb '04

18 Feb '04

To the community; I'm thinking of geting comeau computing's c++ frontend for visual c++.net 2003. I was wondering if anyone has experience using those two programs in conjunction with the boost libraries. In viewing the regression test, I was also wondering why Comeau doesn't seem to compile at a rate of 100% with boost. Is that due to Comeau unconformance, boost unconformance or problems with the c++ backend program, vc 7.1, gcc 3.2 ect. Anyone have any clues? Thanks Ben _________________________________________________________________ Stay informed on Election 2004 and the race to Super Tuesday. http://special.msn.com/msn/election2004.armx

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RE: [Boost-users] Trouble linking regex library on Solaris machine
by Ben Hutchings 18 Feb '04

18 Feb '04

Justin Adam Miller <millerj(a)wam.umd.edu> wrote: > Howdy. As I am only interested in using the regex library right now, I > followed the instructions for building that library only, using dmake. > Compilation went fine. When I tried using the library in a little test > program with the command: > > g++ regextest.cxx -I./boost_1_31_0 > -L./boost_1_31_0/libs/regex/build/sunpro -lboost_regex -o > regextest.cxx > > I get many undefined symbol errors. If requested, I can provide the > entire error output. It looks like you are trying to use the wrong library. SunPro refers to the Sun C++ compiler and tools whereas you are using GNU C++. You have to build the library and application with the same compiler.

2 1

Trouble linking regex library on Solaris machine
by Justin Adam Miller 18 Feb '04

18 Feb '04

Howdy. As I am only interested in using the regex library right now, I followed the instructions for building that library only, using dmake. Compilation went fine. When I tried using the library in a little test program with the command: g++ regextest.cxx -I./boost_1_31_0 -L./boost_1_31_0/libs/regex/build/sunpro -lboost_regex -o regextest.cxx I get many undefined symbol errors. If requested, I can provide the entire error output. Justin Miller

2 2

RE: [Boost-users] Re: Semaphore and barriers for boost-threads?
by Ben Hutchings 18 Feb '04

18 Feb '04

Craig Rodrigues <rodrigc(a)crodrigues.org> wrote: > It is possible to implement semaphore's with mutexes and > condition variables. I looked at the source code for > FreeBSD 5.2's implementation of semaphores to see how this was > done: > > http://www.freebsd.org/cgi/cvsweb.cgi/~checkout~/src/lib/libpthread/thre ad/thr_sem.c > > I even took a whack at writing one based on Boost (it may be buggy): > > #include <boost/thread.hpp> > #include <boost/thread/mutex.hpp> > > struct mysem { > mysem(unsigned int count): count_(count) {} > > void post() { > boost::mutex::scoped_lock l(sem_mutex_); > ++count_; > sem_cond_.notify_all(); notify_one() should be safe and more efficient here, because any of the waiters can be satisfied by the change you have made. Use notify_all() where waiters are waiting for different conditions on the same condition variable. (I'm not sure I expressed that exactly correctly - can anyone improve on that?) > } > > void wait() { > boost::mutex::scoped_lock l(sem_mutex_); > for(;;) { > > if( count_ == 0 ) sem_cond_.wait(l); This is wrong - you must always use while rather than if to test the inverse of the condition you are waiting for because it is possible that the condition is no longer true when wait() returns. (There is also a function template for wait() that tests a predicate for you.) It is even possible on some systems for wait() to return even though no-one called notify_one() or notify_all(). > else { --count_; break; } > } > } > > private: > unsigned int count_; > boost::mutex sem_mutex_; > boost::condition sem_cond_; > }; > > > What kinds of things can go wrong if I use this class? <snip> The other potential problem I see is overflow of count_, but it is exceedingly unlikely that you will be able to create enough threads to cause that.

1 0

TimePropertyMap
by Abhishek Parajuli 18 Feb '04

18 Feb '04

2 1

Help required with tokenizer class
by Matthew Delves 18 Feb '04

18 Feb '04

Greetings, Have been experimenting with the tokenizer class('s) in Boost and have come to a bit of an impass. What I am attempting to do is write an email client. Communication is okay, though what I am stuck on is breaking apart the header of the email into meaningful information. As according to RFC822 each header field is sepperated by \r\n (CRLF) I want to use this as a deliminator for the email message. Unfortunantly each field in the header can be spread over multiple lines ~ and thereby when I use \r\n as a deliminator with boost it will seperate strings if their is a \r or a \n. This is not what I want to happen. What I would like to do is sepperate on \r\n and only on that string and if there is a "\n " (\n then a space) ignore it (or preferably get rid of the \n and join the two strings). The code that I am using to create the tokenizer is as follows. boost::char_separator<char> deliminator(crlf, "", boost::drop_empty_tokens); boost::tokenizer<boost::char_separator<char> > tokenizer(recieved, deliminator); If anyone has any suggestions it would be of great help. Thanks, Matthew Delves http://www.webmastermattd.net (Please send replies directly to me and not to the list... thanks)

3 3

Mathematical expressions with containers
by Russell Hind 18 Feb '04

18 Feb '04

Currently I'm doing more and more mathematical calculations on containers, and wondered if there is any library out there that allows containers to be placed in expressions without having to use transform/for_each etc. e.g. std::vector<std::complex<double> > V1; std::vector<std::complex<double> > V2; double C1, C2; ... std::vector<std::complex<double> > Result; Result = C1 + V2 / (V1 * C2); while would be equivalent to (assuming Result has been resized) (I'm currently using a mixture of transforms and spirit::phoenix (because lambda doesn't work with my compiler)) transform(V1.begin(), V1.end(), V2.begin(), Result.begin(), C1 + phoenix::arg2 / (phoenix::arg1 * C2)); Or something to this effect that will aid with this. Cheers Russell

1 0

spirit max_limit_d min_limit_d limit_d directives
by Владимир Красовский 18 Feb '04

18 Feb '04

Hello everyone Is it expected behavior, that code like this: typedef uint_parser<double> uint_double_parser; my_rule_t max_59_uint = max_limit_d<double>(59.) [ uint_double_parser() ] [max_59_uint.value = arg1] ; causes assertion on input like "" or "aaa"? Investigating problem, I found that in function parse(ScannerT const& scan) const hit.value() used directly, without checking if it valid (see original code). If it is expected use, then what function parser_result::has_valid_attribute() for ? I've modified function parse(ScannerT const& scan) const (see my code) and everything works fine, but I'm not sure if such modification is "legitimate" and does not break anything else. original code (<boost_1_31_0>\boost\spirit\core\composite\directives.hpp): /////////////////////////////////////////////////////////////////////////// // // max_bounded class // /////////////////////////////////////////////////////////////////////////// template <typename BoundsT> struct max_bounded_gen; template <typename ParserT, typename BoundsT> struct max_bounded : public unary<ParserT, parser<max_bounded<ParserT, BoundsT> > > { typedef max_bounded<ParserT, BoundsT> self_t; typedef unary_parser_category parser_category_t; typedef max_bounded_gen<BoundsT> parser_generator_t; typedef unary<ParserT, parser<self_t> > base_t; template <typename ScannerT> struct result { typedef typename parser_result<ParserT, ScannerT>::type type; }; max_bounded(ParserT const& p, BoundsT const& max__) : base_t(p) , max_(max__) {} template <typename ScannerT> typename parser_result<self_t, ScannerT>::type parse(ScannerT const& scan) const { typedef typename parser_result<self_t, ScannerT>::type result_t; result_t hit = this->subject().parse(scan); if (hit.value() > max_) // ^^^^^^^^^^^ no check for validity return scan.no_match(); return hit; } BoundsT max_; }; my code: /////////////////////////////////////////////////////////////////////////// // // max_bounded class // /////////////////////////////////////////////////////////////////////////// template <typename BoundsT> struct max_bounded_gen; template <typename ParserT, typename BoundsT> struct max_bounded : public unary<ParserT, parser<max_bounded<ParserT, BoundsT> > > { typedef max_bounded<ParserT, BoundsT> self_t; typedef unary_parser_category parser_category_t; typedef max_bounded_gen<BoundsT> parser_generator_t; typedef unary<ParserT, parser<self_t> > base_t; template <typename ScannerT> struct result { typedef typename parser_result<ParserT, ScannerT>::type type; }; max_bounded(ParserT const& p, BoundsT const& max__) : base_t(p) , max_(max__) {} template <typename ScannerT> typename parser_result<self_t, ScannerT>::type parse(ScannerT const& scan) const { typedef typename parser_result<self_t, ScannerT>::type result_t; result_t hit = this->subject().parse(scan); if (!hit.has_valid_attribute() || hit.value() > max_) // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ is this right ? return scan.no_match(); return hit; } BoundsT max_; }; -- Best regards, Vladimir mailto:vkrasovsky@yandex.ru

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RE: [Boost-users] tips from anyone using boost with Qt?
by Tom Matelich 18 Feb '04

18 Feb '04

We actually primarily use ACE threads, mainly because we started our development before Boost or Qt had threads. The only point I might make is that Qt currently doesn't support threads on HP. For the next independent thing I write needing threads, I'll probably use the Boost thread API, only because it seems like an implementation that was approached from a very C++ POV with a lot of really smart people giving input into the design. I love Qt for its UI, but much of their cross-platform wrapping code leaves something to be desired for me. -----Original Message----- From: Paul Miller [mailto:paul@fxtech.com] Sent: Tue 2/17/2004 12:32 PM To: boost-users(a)lists.boost.org Cc: Subject: [Boost-users] tips from anyone using boost with Qt? I'm in the interesting situation of having to decide whether to use Qt threads or boost threads in this application I am developing. boost threads sound nice because they do not require Qt. Qt threads sound nice because they are integrated more with Qt, and might interroperate better when combined with a UI. Anyone have any advice on the matter? _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users ----------------------------------------------------------------------- DISCLAIMER: Information contained in this message and/or attachment(s) may contain confidential information of Zetec, Inc. If you have received this transmission in error, please notify the sender by return email. -----------------------------------------------------------------------

1 0

tips from anyone using boost with Qt?
by Paul Miller 17 Feb '04

17 Feb '04

I'm in the interesting situation of having to decide whether to use Qt threads or boost threads in this application I am developing. boost threads sound nice because they do not require Qt. Qt threads sound nice because they are integrated more with Qt, and might interroperate better when combined with a UI. Anyone have any advice on the matter?

1 0

retrieving boost::variant values to different types
by Andrew Chapman 17 Feb '04

17 Feb '04

Hey everyone, I was just having a look at the new boost::variant vlass, and I was expecting to be able to do something like: boost::variant<int, float> var; var = 5; int i = boost::get<int>(var); // fine float f = boost::get<float>(var); // throws As the comments show, asking for the variant's value using get<int> works fine but get<float> throws an exception as it is an unmatched type. So it seems that before you can retrieve the value of the variant you need to know its type? How do you check what type the variant is currently holding? This would work but is inefficient/ugly: boost::variant<int, float> var; var = 5; std::stringstream str; str << var; int i = atoi(str.str()); float f = atof(str.str()); I was hoping to use the variant class to implement scripting language style variables where you can get/set them to be any type (which seems to work fine) and also retrieve them to any type (though retrieving a string as a bool may not always make too much sense). Any suggestions? -- Andrew Chapman 3D Technical Director - Framestore CFC

1 0

MPL: loop unrolling
by Martin Wartens 15 Feb '04

15 Feb '04

Hi, is there a way to unroll a loop with mpl? I simply would like to unroll for (int i=0; i<10; i++) foobar(i); MPL looks like it is quite powerful, but what is it worth when there is no useful documentation? There are hardly any examples, the mini-tutorial is indeed very mini. Then there is a listing of the interfaces and "the MPL paper", which is mainly concerned with design/implementation questions. Regards, Martin ________________________________________________________________________________________________ Sagen Sie nicht, wir hätten Sie nicht gewarnt! http://my-mail.ch/?redirect=9901 Bestellen Sie Ihren PC oder Ihr Notebook online und sparen Sie! http://my-mail.ch/?redirect=1530

2 1

Building boost with dev-cpp
by mvogt＠juptech.com 15 Feb '04

15 Feb '04

Hi, can anyone help me with building boost using dev-cpp? I'm trying to build boost 1.31.0 with this system, never having used it before. I have Dev-Cpp installed at C:\Program Files\Dev-Cpp, and boost extracted to C:\Code\boost_1_31_0. Using the command line: C:\Code\boost_1_31_0> bjam "-sTOOLS=mingw" "-sMINGW_ROOT_DIRECTORY=c:/progra~1/dev-cpp" install bjam tries to start building various targets, and manages to invoke the compiler, but all compilations fail due to failing to find the standard include files - various manipulations of -sMINGW_INCLUDE_DIRECTORY haven't helped. This is the output of the first compile in the build: -------------------------------------------------------------- c:/progra~1/dev-cpp/bin/\g++ -c -Wall -ftemplate-depth-100 -DBOOST_DATE_TIME_POSIX_TIME_STD_CONFIG -DBOOST_ALL_DYN_LINK=1 -g -O0 -fno-inline -mno-cygwin -I"bin\boost\libs\date_time\build" -I "C:\Code\boost_1_31_0" -o "bin\boost\libs\date_time\build\boost_date_time.dll\mingw\debug\greg_month.obj" "C:/Code/boost_1_31_0/libs/date_time/build/../src/gregorian/greg_month.cpp" In file included from C:/Code/boost_1_31_0/boost/config.hpp:40, from C:/Code/boost_1_31_0/boost/shared_ptr.hpp:18, from C:/Code/boost_1_31_0/boost/date_time/gregorian/greg_month.hpp:14, from C:/Code/boost_1_31_0/libs/date_time/src/gregorian/greg_month.cpp:14: C:/Code/boost_1_31_0/boost/config/select_stdlib_config.hpp:20:19: utility: No such file or directory In file included from C:/Code/boost_1_31_0/boost/shared_ptr.hpp:27, from C:/Code/boost_1_31_0/boost/date_time/gregorian/greg_month.hpp:14, from C:/Code/boost_1_31_0/libs/date_time/src/gregorian/greg_month.cpp:14: C:/Code/boost_1_31_0/boost/detail/shared_count.hpp:35:61: memory: No such file or directory C:/Code/boost_1_31_0/boost/detail/shared_count.hpp:36:41: functional: No such file or directory C:/Code/boost_1_31_0/boost/detail/shared_count.hpp:37:46: exception: No such file or directory C:/Code/boost_1_31_0/boost/detail/shared_count.hpp:38:46: new: No such file or directory C:/Code/boost_1_31_0/boost/detail/shared_count.hpp:39:61: typeinfo: No such file or directory C:/Code/boost_1_31_0/boost/detail/shared_count.hpp:40:43: cstddef: No such file or directory [ snip ] C:/Code/boost_1_31_0/boost/detail/shared_count.hpp:389: confused by earlier errors, bailing out Executing through .bat file Executing command [cmd.exe] [/Q/C][C:\DOCUME~1\MJV1\LOCALS~1\Temp\jam5712-00.bat] ...failed gcc-C++-action bin\boost\libs\date_time\build\boost_date_time.dll\mingw\debug\greg_month.obj... gcc-C++-action bin\boost\libs\date_time\build\boost_date_time.dll\mingw\debug\greg_weekday.obj -------------------------------------------------------------- I would be happy to supply any output that might be useful in diagnosing my problem. Thanks, Matt ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify mail.administrator(a)jupiters.com.au **********************************************************************

3 2

Regex linker problem with VC7.1
by Keith MacDonald 15 Feb '04

15 Feb '04

I built boost 1.31.0 using bjam "-sTOOLS=VC7.1", and the static library names that are generated for regex do not match those generated by its header files. For example, one actual library name is: libboost_regex-VC7.1-mt-gd-1_31.lib Whereas, because of the "#pragma comment(lib, ..." stuff, the linker expects: libboost_regex-vc71-mt-gd-1_31.lib There's no header macro to disable automatic linking, so renaming the library is the easiest workaround. Keith MacDonald

2 2

Use of regex_grep in regex_replace
by Keith MacDonald 15 Feb '04

15 Feb '04

I need to know if regex_replace actually makes any replacements, so will have to code something similar myself, rather than using it as is. The 1.31.0 documentation states that regex_replace (effectively) constructs a regex_iterator object to do the work, but in practice it uses the deprecated regex_grep algorithm. Is there some advantage to doing it that way? Thanks, Keith MacDonald

2 1

regex_replace not found
by Scott Field 15 Feb '04

15 Feb '04

I installed boost_1_31_0 on Red Hat Fedora Core 1 with no apparent errors. I can compile and run the examples in /usr/local/src/boost_1_31_0/libs/date_time/example and I have compiled and run some graph examples so I think it is installed OK. However when I compile /usr/local/src/boost_1_31_0/libs/regex/example/snippets/credit_card_example.cpp (or anything that uses regex_replace) I get the following error: [root@athlon snippets]# g++ credit_card_example.cpp credit_card_example.cpp: In function `std::string machine_readable_card_number(const std::string&)': credit_card_example.cpp:35: error: `regex_replace' undeclared in namespace ` boost' credit_card_example.cpp: In function `std::string human_readable_card_number(const std::string&)': credit_card_example.cpp:40: error: `regex_replace' undeclared in namespace ` boost' TIA Scott

2 2

boost_1_31_0 VC7.1 Lib names incompatible with VS IDE???
by Jeff Flinn 14 Feb '04

14 Feb '04

Sorry if I'm missing something here but when I build boost with: bjam "-sTOOLS=VC7.1" "-sVC71_ROOT=C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7" I get libs and dll's generated with names like: libboost_signals-VC7.1-mt-gd-1_31.lib Entering the above into the VS-IDE Project-Properties Dialong - Linker-Input Additional-Dependencies Field and trying to Link yields: Linking... LINK : fatal error LNK1104: cannot open file 'libboost_signals-vc71-mt-gd-1_31.lib' Removing the '.' from VC7.1 in the IDE and renaming the file in like fashion allows the Link to succeed. Is there a way to generate the names in the first place without the offending '.'. Should the '7.1' be generated at all? The Toolset Abbreviation Table in getting_started.html list "vc" for both VC7 and VC7.1. Thanks, Jeff

3 3

Iterator library docs
by Ded Panas 13 Feb '04

13 Feb '04

Subj looks fine, but which files to #include to use the library? dedpanas

2 1

RE: [Boost-users] building boost on HP-UX
by Tom Matelich 13 Feb '04

13 Feb '04

I use boost on HP with g++. It works fairly well. I'm not sure what's going on with Toon. He took over the HP testing from Jens Maurer who was using an account Boost has been given into a server at HP. For a while, the aCC team was saying they were going to start using boost in their regression testing. I'm not sure why they haven't. I'd really like to see if they've improved at all, lately, but I don't have a recent version of aCC to use. > -----Original Message----- > From: Cheenu Srinivasan [mailto:cheenu_srinivasan@hotmail.com] > Sent: Friday, February 13, 2004 7:33 AM > To: boost-users(a)lists.boost.org > Subject: [Boost-users] building boost on HP-UX > > > I've been trying to locate information on how boost performs on HP-UX. > > The boost regression log runs with aCC are 7 months old: > http://boost.sourceforge.net/regression-logs > and the results (74% failure) are not encouraging. > > Has aCC been given up for dead by the boost community? Has anyone > tried other compilers? g++? comeau? Thanks. > > Cheenu > > _________________________________________________________________ > Check out the great features of the new MSN 9 Dial-up, with > the MSN Dial-up > Accelerator. http://click.atdmt.com/AVE/go/onm00200361ave/direct/01/ > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > ----------------------------------------------------------------------- DISCLAIMER: Information contained in this message and/or attachment(s) may contain confidential information of Zetec, Inc. If you have received this transmission in error, please notify the sender by return email. -----------------------------------------------------------------------

1 0

building boost on HP-UX
by Cheenu Srinivasan 13 Feb '04

13 Feb '04

I've been trying to locate information on how boost performs on HP-UX. The boost regression log runs with aCC are 7 months old: http://boost.sourceforge.net/regression-logs and the results (74% failure) are not encouraging. Has aCC been given up for dead by the boost community? Has anyone tried other compilers? g++? comeau? Thanks. Cheenu _________________________________________________________________ Check out the great features of the new MSN 9 Dial-up, with the MSN Dial-up Accelerator. http://click.atdmt.com/AVE/go/onm00200361ave/direct/01/

1 0

Bug in random library
by rupp＠stud.uni-frankfurt.de 13 Feb '04

13 Feb '04

I have either overlooked something basic or found a bug in the random library: boost::mt19937 engine_; double result_ = boost::uniform_real<double>(0., 1.) (engine_); std::cout << result_ << std::endl; assert ( (0. <= result_) && (result_ < 1.) ); results in 4.29093e+09 test_boost: test/test_boost.cpp:17: void test_random (): Assertion `(0. <= result_) && (result_ < 1.)' failed. Abort Although the documentation says "The current implementation is buggy, because it may not fill all of the mantissa with random bits." IMHO this is worse than that: I expected the result to satisfy min <= result < max. I'm using boost 1.31.0 and g++ 2.96 as well as g++ 3.3.2 (identical results) on Red Hat Linux. I hope that either someone can explain me my mistake or fix the bug. Matthias Rupp

1 0

RNG, operator<< and VC7.1
by Witz 13 Feb '04

13 Feb '04

I'm trying to save the state of the random number generators to file but for some reason VC7.1 doesn't seem to be able to find operator<< (or operator>> when i need to read it back in). Anyone else had this problem? Is there a solution other than going in to the header file and creating a read and write function that contains the same code as the streaming operators? I.Whittley

1 0

boost_1_31_0 transform_iterator and VC71 ICE - FYI
by Jeff Flinn 12 Feb '04

12 Feb '04

I've begun converting my projects to using the new iterator_adaptor's. I've encountered an ICE with the code below. I've tried to isolate it to a simple console app but of course, the problem does not occur there. The following distillation does ICE, when compiled with the /Gm (Enable Minimal Rebuild) flag, but compiles and runs fine w/out it. This is an MFC multithreaded lib project NOT using precompiled headers. I'll continue to try to isolate the conditions.Any thoughts on how to isolate the problem? VC7.1 error message: C:\boost\boost_1_31_0\boost\mpl\aux_\preprocessed\plain\apply.hpp(50) : fatal error C1001: INTERNAL COMPILER ERROR (compiler file 'msc1.cpp', line 2701) #include <string> #include <algorithm> #include <vector> #include <numeric> #include <boost/bind.hpp> #include <boost/function.hpp> #include <boost/iterator/transform_iterator.hpp> typedef std::pair<int,int> CSize; CSize SizeFromString( const std::string& aString ){ return CSize(1,2); } CSize XUnionStacked ( const CSize& aSz1, const CSize& aSz2 ){ return CSize(1,2); } CSize XSizeMultiLine( const std::string& aString, const CSize& aSize ) { CSize lSize(0,0); boost::function1<CSize,const std::string& > lSizeFromStringFnc = boost::bind( SizeFromString, _1 ); boost::function2<CSize,const CSize&,const CSize& > lSizeUnionStackedFnc = boost::bind( XUnionStacked, _1, _2 ); std::vector<std::string> lStrings(10); lSize = std::accumulate ( boost::make_transform_iterator( lStrings.begin(), lSizeFromStringFnc ) , boost::make_transform_iterator( lStrings. end(), lSizeFromStringFnc ) , lSize , lSizeUnionStackedFnc ); return lSize; } Thanks, Jeff F

2 1

RE: [Boost-users] Threading problem
by Ben Hutchings 12 Feb '04

12 Feb '04

Damien McGivern <d_mcgivern(a)yahoo.com> wrote: > (First post) > Hi, > I've just started working with boost and have come > into some trouble with the thread class. I've included > the test code that I'm having the problem with in the > hope that someone could point out to me where I'm > going wrong. > > The code tests the QueueAccessor class > (CommandQueue.hpp) with the test code in > CommandQueueTest.hpp. I created a base class > (Runnable) to aid in creating a thread that runs an > object's method rather than a function. The code > compiles OK and seems to run OK too at first until I > realised that the main thread has somehow become one > of the threads that I created and is in a continuous > loop after the first join() is called > > _writer_thread1->join(); // line 21 join() waits for the thread to *end*. This should be done after the threads have been told to Stop(). > As you can probably guess from my code my background > is in Java so I'm not entirely sure if I'm using the > boost::thread correctly. I thought Java's join() was exactly the same. > I tested the QueueAccessor > using threads that use a static worker function > instead of an object's method and it seemed to run OK > so I'm assuming that the problem lies with the > Runnable base class. > > I'm using boost version 1.31.0 running Windows XP and > using VS.Net 2003 to compile/run the code. > > Any help will be very much appreciated Here are the bugs I found: - Runnable::_running is read and written from multiple threads without use of a mutex. - The result of QueueAccessor::Pop is undefined if the queue is empty. Perhaps it should throw in this case? - The return type of QueueAccessor::Size should be std::queue<QueueItem>::size_type (which I think is std::size_t). - QueueAccessor::Size doesn't lock the mutex for the queue. - Reader::Do busy-waits for input. It should wait on a condition variable instead. (Condition variables provide functions equivalent to the wait, notify and notifyAll methods that Object has in Java.) Worse, when the reader is asked to stop, Reader::Do may never return to Worker::Run and so the thread will never stop. - CommandQueueTest.hpp doesn't include <iostream>. - #include <name> is reserved for use with system headers. You should use #include "name" for including your own headers. - Identifiers that include "__" are reserved for the use of the implementation. You must not use them. - Many member variables are protected when they should be private. I have fixed most of the above and the program now works. Ben.

2 1

boost_1_31_0 documentation - "Getting Started"
by Jeff Flinn 12 Feb '04

12 Feb '04

First the nit - The examples for running bjam include the arguments in double quotes as in: bjam "-sTOOLS=gcc" install Being bjam and generally makefile(and generally command line) impaired I tried: bjam "-sTOOLS=VC71" "-sVC71_ROOT=C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7" Which results in: VC71-tools.jam: No such file or directory C:\boost\boost_1_31_0\tools/build/v1\allyourbase.jam:630: in C++ rule C++-action unknown in module C:\boost\boost_1_31_0\tools/build/v1\allyourbase.jam:1097: in Object C:\boost\boost_1_31_0\tools/build/v1\allyourbase.jam:1162: in Objects C:\boost\boost_1_31_0\tools/build/v1\boost-base.jam:130: in dll-files C:\boost\boost_1_31_0\tools/build/v1\boost-base.jam:1934: in subvariant-target C:\boost\boost_1_31_0\tools/build/v1\boost-base.jam:2361: in stage Jamfile:144: in load-jamfiles C:\boost\boost_1_31_0\tools\build\v1\bootstrap.jam:15: in boost-build C:\boost\boost_1_31_0\boost-build.jam:16: in module scope Of course the following works great! bjam -sTOOLS=VC71 -sVC71_ROOT="C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7" So I'm not sure of the purpose of the "" in the documentation, but they are misleading, at least to me. The Praise - Awesome improvement in the completeness and organization of the built libs and dlls! Thanks, Jeff

2 2

RE: [Boost-users] Threading problem
by Geert Pante 12 Feb '04

12 Feb '04

There's nothing wrong with your runnable class, but with your use of thread::join(). Boost::threads start as soon as they are constructed, join() means: wait until they are finished. In your test code, it doesn't make sense to join() your threads before you Stop() them. Probably the next is what you meant: Threading::boost_thread_starter starter3((Threading::Runnable *)&writer2); boost::thread* _writer_thread2 = new boost::thread(starter3); // pause for 5 secs boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += 5; boost::thread::sleep(xt); writer2.Stop(); _writer_thread2->join(); Cya, Geert.

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Threading problem
by Damien McGivern 12 Feb '04

12 Feb '04

(First post) Hi, I've just started working with boost and have come into some trouble with the thread class. I've included the test code that I'm having the problem with in the hope that someone could point out to me where I'm going wrong. The code tests the QueueAccessor class (CommandQueue.hpp) with the test code in CommandQueueTest.hpp. I created a base class (Runnable) to aid in creating a thread that runs an object's method rather than a function. The code compiles OK and seems to run OK too at first until I realised that the main thread has somehow become one of the threads that I created and is in a continuous loop after the first join() is called _writer_thread1->join(); // line 21 As you can probably guess from my code my background is in Java so I'm not entirely sure if I'm using the boost::thread correctly. I tested the QueueAccessor using threads that use a static worker function instead of an object's method and it seemed to run OK so I'm assuming that the problem lies with the Runnable base class. I'm using boost version 1.31.0 running Windows XP and using VS.Net 2003 to compile/run the code. Any help will be very much appreciated Cheers mcgiv ___________________________________________________________ BT Yahoo! Broadband - Free modem offer, sign up online today and save £80 http://btyahoo.yahoo.co.uk #ifndef __TEST_COMMANDQUEUE2__ #define __TEST_COMMANDQUEUE2__ #include <Universal/CommandQueue.hpp> #include <Threading/Runnable.hpp> using namespace Universal; boost::mutex _iomutex; class Worker : public Threading::Runnable { public: Worker(QueueAccessor* q):Threading::Runnable(), _queue(q), _pause_sec(0){} void Run() { while(this->_running) { this->Do(); if(this->_pause_sec > 0) this->Pause(this->_pause_sec); } } virtual void Do() = 0; protected: QueueAccessor* _queue; int _pause_sec; }; class Writer : public Worker { public: Writer(QueueAccessor* q):Worker(q),_index(0){ this->_pause_sec = 2; } void Do() { boost::mutex::scoped_lock scoped_lock(_iomutex); QueueItem item("hi there", this->_index++); this->_queue->Push(item); std::cout << "Add" << std::endl; } short _index; void Stop() { boost::mutex::scoped_lock scoped_lock(_iomutex); this->_running = false;//Threading::Runnable::Stop(); std::cout << "Stopped Writer" << std::endl; } }; class Reader : public Worker { public: Reader(QueueAccessor* q):Worker(q){} void Do() { while(this->_queue->Size() == 0){} boost::mutex::scoped_lock scoped_lock(_iomutex); QueueItem item = this->_queue->Pop(); std::cout << "Removed id=" << item._data_len << " Data=" << item._data << std::endl; } void Stop() { boost::mutex::scoped_lock scoped_lock(_iomutex); this->_running = false;//Threading::Runnable::Stop(); std::cout << "Stopped Reader" << std::endl; } }; void test() { QueueAccessor* q = new QueueAccessor(); Reader reader(q); Writer writer1(q); Writer writer2(q); // set up threads Threading::boost_thread_starter starter((Threading::Runnable *)&reader); boost::thread* _reader_thread = new boost::thread(starter); Threading::boost_thread_starter starter2((Threading::Runnable *)&writer1); boost::thread* _writer_thread1 = new boost::thread(starter2); Threading::boost_thread_starter starter3((Threading::Runnable *)&writer2); boost::thread* _writer_thread2 = new boost::thread(starter3); // start threads _writer_thread1->join(); _writer_thread2->join(); _reader_thread->join(); // pause for 5 secs boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += 5; boost::thread::sleep(xt); reader.Stop(); writer1.Stop(); writer2.Stop(); delete q; char c; std::cin >> c; } #endif __TEST_COMMANDQUEUE2__ #ifndef __IRUNNABLE__ #define __IRUNNABLE__ #include <boost/thread/thread.hpp> #include <boost/thread/xtime.hpp> namespace Threading { class Runnable { public: Runnable():_running(true){} virtual void Run() = 0; virtual void Stop(){_running = false;} protected: bool _running; // sleeps thread for x sec void Pause(int sec) { boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += sec; boost::thread::sleep(xt); } void Pause(int sec, int ns) { boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += sec; xt.nsec += ns*1000; boost::thread::sleep(xt); } }; // used to pass the Runnable object to the thread's start function struct boost_thread_starter { boost_thread_starter(Runnable* runnable):_runnable(runnable){} // function is called when boost::thread starts void operator()() { // start the Runnable's run method _runnable->Run(); } Runnable* _runnable; }; }// end Threading namespace #endif // __IRUNNABLE__ #ifndef __COMMANDQUEUE__ #define __COMMANDQUEUE__ #include <boost/thread/mutex.hpp> #include <queue> namespace Universal { struct QueueItem { /* QueueItem(int thread, int value):_thread(thread), _value(value){} int _thread; int _value; //*/ QueueItem(char *data, short data_len):_data(data), _data_len(data_len){} char *_data; short _data_len; //*/ }; // used to sync access to the queue class QueueAccessor { public: QueueAccessor(){} void Push(QueueItem item) { boost::mutex::scoped_lock scoped_lock(_mutex); _queue.push(item); } QueueItem Pop() { boost::mutex::scoped_lock scoped_lock(_mutex); if( _queue.size() > 0 ) { QueueItem tmp = _queue.front(); _queue.pop(); return tmp; } } int Size() { return _queue.size(); } protected: std::queue<QueueItem> _queue; boost::mutex _mutex; }; }// Universal namespace #endif // __COMMANDQUEUE__

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