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[BGL] How can my visitors visit?
by �ڱ�� 11 Jun '02

11 Jun '02

Compiling below, It's OK. but executing, visitors do nothing. What's the problem? Is this slicing problem? why? thank you in advance. ---------------------- below ------------------------ // bfs visitor 1. just printing every vertex in breath first order. struct graph_printer1 : public default_bfs_visitor { template<typename Vertex, typename Graph> void discover_vertex(Vertex u, Graph& g) { cout << " graph printer 1" < void discover_vertex(Vertex u, Graph& g) { cout << " graph printer 2" < m_graph; public: // HERE. this Visit function does nothing.!! void Visit(default_bfs_visitor* vis, int vertexID ) { breadth_first_search(m_graph, vertex(vertexID, m_graph), visitor(*vis)); } }; int main() { graph_wrapper holder; graph_printer1 vis1; graph_printer2 vis2; holder.Visit(&vis1); holder.Visit(&vis2); return 0; } ---------------------------------------- Ki-Soo, Park e-mail: park(a)erhouse.co.kr wfms123(a)hotmail.com

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Hi!
by rajanik3 11 Jun '02

11 Jun '02

Hi! Could some body tell me how to use boost libraries in Unix. I am using tcsh shell. After downloading, what should I change in order for the compiler to locate the boost library headers. Thanks, Raj.

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thread::join() usage
by rgalek2002 10 Jun '02

10 Jun '02

Hi, I have an application which starts a number of threads, and I want the application to wait for the threads to finish before exiting. Standard stuff, I know, but never having used threads before I am wondering what the stadard way is to accomplish this. I have (psuedo code) for (each record in database) { thread thrd(func(), data); } I could imagine storing all my thread objects in a list, and then calling join() on each one. For example something like list <thread> threads; for (each rec in db) { thread thrd(func(), data); threads.insert(threads.begin(),thrd); } list<thread>::iterator i; for (i=threads.begin(); i!=threads.end(); i++) { thread t = *i; t.join(); } Does this seem reasonable? Is there a better/standard way? One thing I don't like here is that each join will block, when what I would like to do is something more like join_all(); Thanks, Rich

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Intel-win32 Build Problem
by thorneg 09 Jun '02

09 Jun '02

I'm getting errors in xtime.cpp relating to uint64_t when building with the Intel-win32 v6.0 compiler. The errors are: xtime.cpp libs\thread\build\../src\xtime.cpp(80): error: namespace "boost" has no member "uint64_t" const boost::uint64_t TIMESPEC_TO_FILETIME_OFFSET = ((boost::uint64_t)27111902UL << 32) + (boost::uint64_t)3577643008UL; Has anyone else run into this? Any help is appreciated. Glenn

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Dynamic Bitset Formal Review June 8-17
by Mat Marcus 08 Jun '02

08 Jun '02

The formal review of Dynamic Bitset by Chuck Alison and Jeremy Siek will commence today Saturday June 8th and run through Monday, June 17th. The library is currently available at <http://groups.yahoo.com/group/boost/files/dyn_bitset.tar.gz> Below is an excerpt from the library's documentation: The dyn_bitset class represents a set of bits. It provides accesses to the value of individual bits via an operator[] and provides all of the bitwise operators that one can apply to builtin integers, such as operator&& and operator<<. The number of bits in the set is specified at runtime via a parameter to the constructor of the dyn_bitset. Each bit represents either the Boolean value true (set) or false (reset). To toggle a bit is to change the value to true if it is false and to false if it is true. Each bit has a non-negative position pos. The position pos == 0 corresponds to the least significant bit and pos == size() - 1 is the most significant bit. When converting an instance of dyn_bitset to or from an unsigned long, the bit position pos corresponds to the bit value 1 << pos. The dyn_bitset class is nearly identical to the std::bitset class. The difference is that the size of the dyn_bitset (the number of bits) is specified at run-time during the construction of a dyn_bitset object, whereas the size of a std::bitset is specified at compile-time through an integer template parameter. For information about submitting a Formal Review, see http://www.boost.org/more/formal_review_process.htm Please try out the library and comment during the review period. Be sure to say whether or not you think the library should be accepted by Boost. Compiler notes: This library has been tested using the following compiler platforms: Gcc 2.95 and 3.01 Kai C++ Metrowerks Codewarrior 8 (beta, Mac) Visual C++ 7.0 Comeau The library presently requires template friend support and is known not to compile with CodeWarrior 7.2 or Visual C++ 6.0. The library has not been tested with Borland. The Formal Review manager is Mat Marcus.

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MacOS.hpp and PowerPlant incompatibility
by Bobby Thomale 08 Jun '02

08 Jun '02

I am trying to use the boost libraries with a PowerPlant project on the MacOS, and I ran into a small incompatibility between the headers. I am not sure which codebase is at fault here. The issue is with the __MACH__ symbol. In the Boost code where it is checking for what platform I am using, it correctly identifies my platform as MacOS. Then, in a file called MacOS.hpp, it uses the __MACH__ symbol to determine if I am using the BSD standard C libraries or MSL. (I am using MSL.) It does this by checking for the EXISTANCE of the __MACH__ symbol, not the value of it: // If __MACH__, we're using the BSD standard C library, not the MSL: #if defined(__MACH__) However, in the PowerPlant header PP_Macros.h, the __MACH__ symbol is defined and set to zero: #ifndef __dest_os // For MSL #ifndef __MACH__ #define __MACH__ 0 #endif #if __MACH__ #include <ansi_prefix.mach.h> #else #define __dest_os __mac_os #endif #endif I was able to work around the problem for now by making the Boost libraries check for both the existance of __MACH__ and the value: #if defined(__MACH__) && __MACH__ Seems to work. However, I am curious. Which way is the right way? Is the __MACH__ symbol's existance or its value supposed to signal whether or not it is "turned on"? The boost headers seem to think it is its existance, but the PowerPlant headers seem to think it is its value. I want to report the problem, but I am not sure whose code needs to change, PowerPlant or Boost. Ideas? -- Bobby --------------------------------------------------------------------- Bobby Thomale Senior Software Developer Inoveon Corporation http://www.inoveon.com/ ---------------------------------------------------------------------

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[BGL] How can I use vertex object rather than integer?
by �ڱ�� 07 Jun '02

07 Jun '02

for example, class Node { public: int m_id; }; class Edge { public: int from_node_id; int to_node_id; }; How can I use this class to make graph? many examples show only integer id graph.. thanks in advance ---------------------------------------- Ki-Soo, Park HP: 82-11-9040-4957 e-mail: park(a)erhouse.co.kr wfms123(a)hotmail.com

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[BGL] how to use visitor with functor?
by �ڱ�� 06 Jun '02

06 Jun '02

Can I use visitor with functor ? In BGL example on visitor, int main() { : boost::breadth_first_search (G, vertex(0, G), visitor(make_bfs_visitor( std::make_pair(print_edge("tree", on_tree_edge()), print_edge("cycle", on_non_tree_edge()))))); : } I want to do like this boost::breadth_first_search (G, vertex(0, G), visitor(make_bfs_visitor( std::make_pair(print_edge("tree", on_tree_edge(), MyFunctor1() ), print_edge("cycle", on_non_tree_edge(), MyFunction2() ))))); can i do this? how? why? thanks in advance.. ps. ths is my first posting. ---------------------------------------- Ki-Soo, Park e-mail: park(a)erhouse.co.kr wfms123(a)hotmail.com

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Boost::Python constructor overloading problems
by John Hunter 06 Jun '02

06 Jun '02

I have been using boost python for some time now and recently upgraded to boost_1_28_0 and gcc 3.0.4. I started getting a segmentation fault when using a library with an overloaded constructor. In trying to track down the source of the problem, I wrote a simple class with an overloaded constructor and still get the seg fault. Perhaps there is something wrong with code or the compile statement, but I have been unable to find. it. So I've also included some additional info below that may give someone a clue as to what is going wrong. Here is the python script which calls the simple class. The second constructor crashes with a seg fault: from TestSimple import Simple # Default constructor OK d1 = Simple() print d1.get() i = 1 d2 = Simple(i) # this line causes the seg fault print d2.get() ---- Here is the code I use to make the module TestSimple: #include <boost/python/class_builder.hpp> class SimpleClass { public: SimpleClass() : i(-1) {}; SimpleClass(int i) : i(i) {}; int get() const { return i; } private: const int i; }; namespace python = boost::python; BOOST_PYTHON_MODULE_INIT(TestSimple) { python::module_builder m( "TestSimple" ); python::class_builder<SimpleClass> simple(m, "Simple"); simple.def(python::constructor<>()); simple.def(python::constructor<int>()); simple.def(&SimpleClass::get, "get"); } ---- Here are the compile commands: /usr/local/bin/g++ -I/usr/local/include/python2.1 -I/usr/local/include -ggdb -Wall -fPIC -ftemplate-depth-21 -c TestSimplePy.cpp /usr/local/bin/g++ -shared -L/usr/local/lib -ggdb -Wall -fPIC -ftemplate-depth-21 TestSimplePy.o -o TestSimple.so -lboost_python ---- I run the script in a controlled environment with: #!/bin/sh export LD_LIBRARY_PATH=/usr/local/lib /usr/local/bin/python2.1 ./testSimple.py ---- Here is the ldd for the TestSimple module: mother:~/c/trade/test> ldd TestSimple.so libboost_python.so.1.28.0 => /usr/local/lib/libboost_python.so.1.28.0 (0x40011000) libstdc++.so.3 => /usr/local/lib/libstdc++.so.3 (0x40078000) libm.so.6 => /lib/i686/libm.so.6 (0x40112000) libgcc_s.so.1 => /usr/local/lib/libgcc_s.so.1 (0x40136000) libc.so.6 => /lib/i686/libc.so.6 (0x4013e000) libutil.so.1 => /lib/libutil.so.1 (0x4026e000) /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000) ---- All the version info looks right -- python2.1 was compiled with the same gcc (3.0.4) that the module was. Thanks for any suggestions, John Hunter

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CW project file
by NOEL Bruno 06 Jun '02

06 Jun '02

Hello, As I am much more familiar with the Metrowerks IDE than with standard makefiles, has anyone made a .mcp project file able to compile whole of the boost library with Codewarrior ? Thanks for the answers and possible files ! Bruno NOËL

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Re: problem with c_regex_traits.cpp
by René Gutschmidt 06 Jun '02

06 Jun '02

>> i have problems with the file c_regex_traits.cpp. I work under CodeWarrior >> 6/7 with a Macintosh. >> These problem ist with boost 1.25.1,1.26. >> >> template <class charT> >> unsigned int BOOST_REGEX_CALL re_get_message(charT* buf, unsigned int >> len, unsigned int id) >> { >> unsigned int size = _re_get_message((char*)0, 0, id); >> if(len < size) >> return size; >> boost::scoped_array<char> cb(new char[size]); >> _re_get_message(cb.get(), size, id); >> size = boost::c_regex_traits<wchar_t>::strwiden(buf, len, cb.get()); >> return size; >> } >> >> inline unsigned int BOOST_REGEX_CALL re_get_message(char* buf, unsigned >> int len, unsigned int id) >> { >> return _re_get_message(buf, len, id); >> } >> >> Is that a known problem? Do you know a workaround? >> (Renaming one of the 're_get_message()' functions does >> the job, but I'm not sure about the implications.) > > I've had a chance to experiment a little with this - if BOOST_NO_WREGEX is > defined (i.e. wide character support is disabled), then removing the > template version of re_get_message is harmless (and may therefore be the fix > that you are looking for). If BOOST_NO_WREGEX is not defined, then > obviously this won't work - so that being the case, what happens if you > surround the definition of > > template <class charT> > unsigned int BOOST_REGEX_CALL re_get_message(charT* buf, unsigned int len, > unsigned int id) > > with > > #ifndef BOOST_NO_WREGEX > ... > #endif > > regards, > > John Maddock Sorry, but I haven't had a chance to answer. Ok it's works. But I need 'wide character support' much later. best regards, Rene Gutschmidt

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RE: [Boost-Users] Re: boost::noncopyable usage question
by Michael Davis 06 Jun '02

06 Jun '02

Thank you for the clarification. :) -----Original Message----- From: Darin Adler To: Boost-Users(a)yahoogroups.com Sent: 6/6/2002 12:57 AM Subject: Re: [Boost-Users] Re: boost::noncopyable usage question On Wednesday, June 5, 2002, at 03:14 PM, Michael Davis wrote: > According to the C++ Standard, 12.8/10, the assignment operator cannot > be > inherited because if it is not provided, the compiler will provide one > implicitly. Or at least, that is my understanding of it. > > Given this, how can boost::noncopyable work? The assignment operator provided by the compiler for the class derived from noncopyable has to copy the part of the object that's inherited from noncopyable. To do that, it has to use the assignment operator from the noncopyable class; but if it's inaccessible, like the private one in noncopyable, it has to report an error. This rule is mentioned in 12.8/14. -- Darin Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

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type_traits::is_POD<> problem
by s9801758 06 Jun '02

06 Jun '02

Hello, I'm using MSVC6.0 with service-pack 6.0 installed. But I'm getting some weird problems. Consider the following simple program: ---------------------------------------------------- struct q { int x; }; int main() { int t; t = boost::is_POD< int >::value; // Ok, t = true; t = boost::is_POD< void >::value; // Ok?, t = true (is 'void' considered a POD?); t = boost::is_POD< q >::value; // Error, t = false } ---------------------------------------------------- Unless my definition of a POD type is incorrect, I think that q is considered POD, right? Am I doing something wrong here, or is the combination boost and msvc fatal once again? Just to be complete, I have the following defines in my main header: #define BOOST_NO_FUNCTION_PTR_TEMPLATE_PARAMETERS #define BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION Thanks in advance, Jaap Suter

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Boost regex and MacOS X.
by Mystical Catty Tananeka 06 Jun '02

06 Jun '02

I've been trying to make MacOS X compile the example snippets from boost_1_28_0/libs/regex/example/snippets/ and I keep getting these messy link errors. It looks like /usr/bin/c++ is having trouble linking to libboost_regex.a here's an example: localhost% c++ -o regex_grep_example_1 regex_grep_example_1.cpp -lboost_regex /usr/bin/ld: Undefined symbols: __._Q25boostt14reg_expression3ZcZQ25boostt12regex_traits1ZcZt9allocator1Zc ___Q25boostt14reg_expression3ZcZQ25boostt12regex_traits1ZcZt9allocator1ZcPCc UiRCB2 ___Q35boost9re_detailt18match_results_base2ZPCcZt9allocator1ZcRCB1 _allocator__CQ25boostt14reg_expression3ZcZQ25boostt12regex_traits1ZcZt9alloc ator1Zc _allocator__CQ35boost9re_detailt18match_results_base2ZPCcZt9allocator1Zc _cow__Q35boost9re_detailt18match_results_base2ZPCcZt9allocator1Zc _m_free__Q35boost9re_detailt18match_results_base2ZPCcZt9allocator1Zc _set_first__Q35boost9re_detailt18match_results_base2ZPCcZt9allocator1ZcPCc _set_first__Q35boost9re_detailt18match_results_base2ZPCcZt9allocator1ZcPCcUl _set_size__Q35boost9re_detailt18match_results_base2ZPCcZt9allocator1ZcUlPCcn 1 localhost% I haven't enough experience with boost to know how to fix this, or even what it means, exactly. If its informative, c++ -v returns: Apple Computer, Inc. version gcc-934.3, based on gcc version 2.95.2 19991024 (release)

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BGL: subgraph<..> Problems
by Matthias Kronenberger 06 Jun '02

06 Jun '02

1. How to create a subgraph from a given simple boost graph type? 2. Why are modell subgraph not the same concept as the underlying graph type? Why are not all non-member function defined for the only graph modell adjacence_list<> also available for subgraph? 3. I've defined something like class NG { public: typedef boost::property<boost::vertex_all_t, SomeIterator, Vertex_Property > vertex_SPIterator_Prop; // GridSP_type::iterator typedef Default::Graph<vertex_SPIterator_Prop, Edge_Property>::Subgraph::Undirected Graph; ... }; where struct Default { ..... template<class VertexProperties=boost::no_property, class EdgeProperties=boost::no_property, class GraphProperties=boost::no_property, class EdgeList=boost::hash_setS, class VertexList=boost::listS > struct Graph { ........ struct Subgraph { typedef typename boost::subgraph < boost::adjacency_list<EdgeList, VertexList, boost::undirectedS, boost::property<boost::vertex_index_t,int, VertexProperties>, boost::property<boost::edge_index_t, int, EdgeProperties > ,GraphProperties> > Undirected; }; .... }; and then i'm doing somewhere else { vertex_descriptor v=boost::add_vertex( theGraph); IteratorMap[Prop ] =v; boost::put( boost::vertex_all_t() , theGraph, v, Prop); return v; } I get a nice error with MSVC 6.5 d:\matthias\programmieren\boost\boost\graph\subgraph.hpp(751): error C2679: Binaerer Operator '=': Kein Operator definiert, der einen rechtsseitigen Operator vom Typ 'const _Ht_iter<pair<int const,surrect::PNSurfel<vectorD<float,3>>>,_Nonconst_trait............ (no operator= defined for the type conversion used in put pmap[k] = val;) But using a simple adjacence_list<..> instead of the subgraph< adjacence_list<...> this mess compiles fine. What am i doing wrong? Are there better ways to create a property map containing (const) iterators, that don't modell STL::RandomAccesIterator? Matthias

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RE: [Boost-Users] Re: boost::noncopyable usage question
by Michael Davis 06 Jun '02

06 Jun '02

According to the C++ Standard, 12.8/10, the assignment operator cannot be inherited because if it is not provided, the compiler will provide one implicitly. Or at least, that is my understanding of it. Given this, how can boost::noncopyable work?

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RE: [Boost-Users] boost::noncopyable usage question
by Mark Storer 05 Jun '02

05 Jun '02

This is more of a C++ question than a boost one (which is why I can answer it;). Your deletes are fine. The only way this would cause a problem is to delete through a boost::noncopyable pointer (in which case everything derived from it would leak). I'm guessing the author, Dave Abrahams, didn't think anyone was going to declare a noncopyable*, so decided to pass on that little bit of extra overhead involved in declaring a destructor virtual. Or it could be a mistake. Dave has posted to this list at least once... So tell us, did you mean to leave it non-virtual? --Mark Storer Software Engineer Cardiff Software #include <disclaimer> typedef std::disclaimer<Cardiff> Discard; -----Original Message----- From: Bobby Thomale [mailto:bthomale@mac.com] Sent: Wednesday, June 05, 2002 9:30 AM To: Boost Users List Subject: [Boost-Users] boost::noncopyable usage question I have a simple question about the usage of boost::noncopyable. I think I know the answer, but I am not sure. The noncopyable class defines a non-virtual destructor. Generally speaking, overriding a non-virtual destructor is considered a "bad thing" but in certain cases (like, I am guessing, this one) it is okay and works like you'd expect. Here's what I am worried about: Let's say I have a base class of an inheritance tree that I want to be non-copyable. So I do this: class MyBase : private boost::noncopyable { public: MyBase (); virtual ~MyBase (); ... }; Then I derive from it class A: class A : public MyBase { public: A (); virtual ~A(); }; and define a destructor for class A, too. Does this do what I would expect, ie whether I delete a MyBase* or an A*, it calls the destructors for both A and MyBase like it is supposed to? I suppose the trivial, empty noncopyable destructor never gets called (which is okay) whether I delete a MyBase* or an A*, correct? (Just curious...) -- Bobby --------------------------------------------------------------------- Bobby Thomale Senior Software Developer Inoveon Corporation http://www.inoveon.com/ --------------------------------------------------------------------- Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

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boost::noncopyable usage question
by Bobby Thomale 05 Jun '02

05 Jun '02

I have a simple question about the usage of boost::noncopyable. I think I know the answer, but I am not sure. The noncopyable class defines a non-virtual destructor. Generally speaking, overriding a non-virtual destructor is considered a "bad thing" but in certain cases (like, I am guessing, this one) it is okay and works like you'd expect. Here's what I am worried about: Let's say I have a base class of an inheritance tree that I want to be non-copyable. So I do this: class MyBase : private boost::noncopyable { public: MyBase (); virtual ~MyBase (); ... }; Then I derive from it class A: class A : public MyBase { public: A (); virtual ~A(); }; and define a destructor for class A, too. Does this do what I would expect, ie whether I delete a MyBase* or an A*, it calls the destructors for both A and MyBase like it is supposed to? I suppose the trivial, empty noncopyable destructor never gets called (which is okay) whether I delete a MyBase* or an A*, correct? (Just curious...) -- Bobby --------------------------------------------------------------------- Bobby Thomale Senior Software Developer Inoveon Corporation http://www.inoveon.com/ ---------------------------------------------------------------------

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Tupls browsing...
by Igor Korzinek 04 Jun '02

04 Jun '02

Hi, I did not take a look at the tuple internals, but it seems that there is some head-tail connection probably built in compile time. So can someone from template gurus answer if it makes sense and if it is possible to add some method that will make sequential access possible. Some function that will getNext() or some kind of search within a tuple ? Is it too stupid or just impossible ? Igor

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Is it worth using if I use MSVC
by Igor Korzinek 04 Jun '02

04 Jun '02

Hi, I'm new to boost. The doc I've browsed seems fine and something what I need. I'm focusing on TUPLEs part. So, besides mentioned cref and ref stuff, is there any other issue I can expect with awful (but a must for me) MS VC 6 ? And are there any sample for using this part of boost ? THX, Igor

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Newbie Thread Installation Problem
by gclee46 03 Jun '02

03 Jun '02

(Please excuse me it this is a duplicate post - I tried to send it yesterday and it didn't seem to arrive) I have Boost 1_28_0 and installed the prebuilt version of Jam for Windows. After installing threads with C:\boost_1_28_0>bjam "-sTOOLS=borland" I get, after skipping the pyton stuff, and all the install messages: ...found 390 targets... However when I try to use the thread I get the following: Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland testthread1.cpp: Fatal F1003 \boost_1_28_0\boost/thread/thread.hpp 17: Error directive: Thread support is unavailable! *** 1 errors in Compile *** I believe that I followed all the directions...I'm using Windows XP Home. Any help would be greatly appreciated. Greg

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BGL and MS compilers (VC++ and Wince)
by a_schweitzer 03 Jun '02

03 Jun '02

I am having difficulting getting BGL to compiler with VC++ 6.0 and Windows CE 3.0, platform builder. In both cases I get internal compiler errors, although at different lines in the compiler. VC++ worked when I had all my code in one cpp file. When I broke it out into multiple files I couldn't get it to compile even when I put it back in one file. I have tried the Zm and Z7 switches to no avail. Perhaps I need the service pack? Wince dies much more quickly, I think when it sees adjacency_list.hpp or depth_first_search.hpp. Does anyone have some perspective on how BGL projects with MS work out? Is there any hope for Wince?

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Dynamic Bitset - Upcoming Formal Review
by Mat Marcus 03 Jun '02

03 Jun '02

The formal review of Dynamic Bitset by Chuck Alison and Jeremy Siek will commence on Saturday June 8th and run through Monday, June 17th. The library is currently available at <http://groups.yahoo.com/group/boost/files/dyn_bitset.tar.gz> Below is an excerpt from the library's documentation: The dyn_bitset class represents a set of bits. It provides accesses to the value of individual bits via an operator[] and provides all of the bitwise operators that one can apply to builtin integers, such as operator&& and operator<<. The number of bits in the set is specified at runtime via a parameter to the constructor of the dyn_bitset. Each bit represents either the Boolean value true (set) or false (reset). To toggle a bit is to change the value to true if it is false and to false if it is true. Each bit has a non-negative position pos. The position pos == 0 corresponds to the least significant bit and pos == size() - 1 is the most significant bit. When converting an instance of dyn_bitset to or from an unsigned long, the bit position pos corresponds to the bit value 1 << pos. The dyn_bitset class is nearly identical to the std::bitset class. The difference is that the size of the dyn_bitset (the number of bits) is specified at run-time during the construction of a dyn_bitset object, whereas the size of a std::bitset is specified at compile-time through an integer template parameter. For information about submitting a Formal Review, see http://www.boost.org/more/formal_review_process.htm Please try out the library so that you will be prepared to to say whether or not you think the library should be accepted by Boost during the upcoming review period next week Compiler notes: This library has been tested using the following compiler platforms: Gcc 2.95 and 3.01 Kai C++ Metrowerks Codewarrior 8 (beta, Mac) The library presently requires template friend support and therfore is known not to compile with CodeWarrior 7.2. The library has not been tested with VC++ or Borland. The Formal Review manager will be Mat Marcus.

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Compilation question
by rgalek2002 03 Jun '02

03 Jun '02

Hi, I am a new user of the boost libs, so sorry for the supid questions. I am running into a compilation error while trying to compile listing 2 and listing 3 from Bill Kempf's article at http://www.cuj.com/articles/2002/0205/0205a/0205a.htm, giving simple usage examples of boost threads. 1. When I compile listing 2, the compiler chokes on the lines boost::thread thrd1(count(1)); boost::thread thrd2(count(2)); with the errors listing2.C:27: no matching function for call to `count (int)' listing2.C:28: no matching function for call to `count (int)' As you can see in the listing online, count is defined as 'struct count{...}' Upon perusal of threah.hpp, I see that, indeed, the class thread constructor is looking for a function, not a struct or class as count is defined in this code. Am I missing something, or is the code in error? 2. In listing 2, I get the following errors when compiling: listing3.C:29: no matching function for call to `bind ({unknown type}, int)' listing3.C:31: no matching function for call to `bind ({unknown type}, int)' This is in response to the lines: boost::thread thrd1(boost::bind(&count, 1)); boost::thread thrd2(boost::bind(&count, 2)); Again, am I missing something or what? I have pasted the code directly from the source as provided online. TIA for your help Richard

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regex Guidance
by Duane Murphy 31 May '02

31 May '02

Fellow Boosters, I am looking for a little guidance with the regex library. I have an application that I would like to use regex for. I am new to regex so I am not sure how to approach it. Mostly I am reading. The examples so far have been very impressive, but so complicated as to make it difficult to understand how to do something simple. What I would like to do is process a string (or file) that has many symbols that are delimited with something like "&foo;". The delimiters are not that interesting. Just something to make them easy to locate. The string between the delimiters is then used to lookup a replacement string and substituted. I would search for something like "&.*;". The examples show how a basic search and replace would work, but how would I do something with a looked-up replace? ...Duane -- "If tyranny and oppression come to this land, it will be in the guise of fighting a foreign enemy." - James Madison

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regex and CodeWarrior?
by Duane Murphy 31 May '02

31 May '02

I am using Boost 1.27. Is there instructions or examples for how to use the regex library with Metrowerks CodeWarrior on a Macintosh (9.x)? ...Duane -- "If tyranny and oppression come to this land, it will be in the guise of fighting a foreign enemy." - James Madison

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regex++ error
by adryio55 31 May '02

31 May '02

Hello, it seems there's an error in reg_expression::operator< in regex_compile.hpp file: bool BOOST_REGEX_CALL reg_expression<charT, traits, Allocator>::operator<(const reg_expression<charT, traits, Allocator>& e)const { // // we can't offer a diffinitive ordering, but we can be consistant: if(_flags != e.flags()) return _flags < e.flags(); if(_expression_len != e._expression_len) return _expression_len < e._expression_len; //error //return std::memcmp(expression(), e.expression(), _expression_len); //right return std::memcmp(expression(), e.expression(), _expression_len) < 0; } The error makes (regular expressions with equal _flags and _expression_len) memcmp() result -1 and +1, to be coverted in the same true bool return value; Thanks, Adriano

2 1

Regex++ regression test failed
by bustamam98 31 May '02

31 May '02

I've compiled boost 1.28 and tried the regex++ regression testing on test1252.txt. It looks like it's failing on some of the input lines. I'm running Linux RH72. Have anyone have any success with this file? Thanks Bustamam Error in line 10 of file test1252.txt Expression: [[:lower:]]+ Search text: Þßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþ÷ Flags: REG_EXTENDED | REG_PERL | REG_AWK | REG_EGREP | basic | char_classes | intervals | bk_refs | normal | basic | extended Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using POSIX API Error in line 11 of file test1252.txt Expression: [[:upper:]]+ Search text: ¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞß Flags: REG_EXTENDED | REG_PERL | REG_AWK | REG_EGREP | basic | char_classes | intervals | bk_refs | normal | basic | extended Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using POSIX API Error in line 12 of file test1252.txt Expression: [[:punct:]]+ Search text: ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿À Flags: REG_EXTENDED | REG_PERL | REG_AWK | REG_EGREP | basic | char_classes | intervals | bk_refs | normal | basic | extended Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using POSIX API Error in line 13 of file test1252.txt Expression: [[:print:]]+ Search text: ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêë= ìíîïðñòóôõö÷øùúûüýþ Flags: REG_EXTENDED | REG_PERL | REG_AWK | REG_EGREP | basic | char_classes | intervals | bk_refs | normal | basic | extended Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using POSIX API Error in line 14 of file test1252.txt Expression: [[:graph:]]+ Search text: ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêë= ìíîïðñòóôõö÷øùúûüýþ Flags: REG_EXTENDED | REG_PERL | REG_AWK | REG_EGREP | basic | char_classes | intervals | bk_refs | normal | basic | extended Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using POSIX API Error in line 15 of file test1252.txt Expression: [a-z]+ Search text: ßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþ Flags: REG_EXTENDED | REG_PERL | REG_AWK | REG_EGREP | basic | char_classes | intervals | bk_refs | normal | basic | extended Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using POSIX API Error in line 16 of file test1252.txt Expression: [a-z]+ Search text: ¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞ Flags: REG_EXTENDED | REG_PERL | REG_AWK | REG_EGREP | basic | char_classes | intervals | bk_refs | normal | basic | extended Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using POSIX API Error in line 17 of file test1252.txt Expression: [[:word:]]+ Search text: ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþ Flags: REG_EXTENDED | REG_PERL | REG_AWK | REG_EGREP | basic | char_classes | intervals | bk_refs | normal | basic | extended Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using POSIX API Error in line 19 of file test1252.txt Expression: [[=a=]]+ Search text: aAàáâãäåÀÁÂÃÄÅ Flags: REG_EXTENDED | REG_PERL | REG_AWK | REG_EGREP | basic | char_classes | intervals | bk_refs | normal | basic | extended regex++ API result mismatch in sub-expression 0, found (0,1) expected (0,14) regex++ API result mismatch in regex_match(iterator, iterator, match_results&, const reg_expression&, int) regex++ API result mismatch in regex_match(const std::string&, match_results&, const reg_expression&, int) regex++ API result mismatch in regex_match(const char_t*, match_results&, const reg_expression&, int) regex++ API result mismatch in sub-expression 0, found (0,1) expected (0,14) regex++ API result mismatch in regex_match(iterator, iterator, match_results&, const reg_expression&, int) regex++ API result mismatch in regex_match(const std::string&, match_results&, const reg_expression&, int) regex++ API result mismatch in regex_match(const char_t*, match_results&, const reg_expression&, int) regex++ API result mismatch in sub-expression 0, found (0,1) expected (0,14) POSIX API result mismatch in sub-expression 0, found (0,1) expected (0,14) Error in line 25 of file test1252.txt Expression: ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝ Search text: ßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþ Flags: REG_EXTENDED | REG_ICASE | REG_PERL | REG_AWK | REG_EGREP | basic | char_classes | intervals | bk_refs | normal | basic | extended Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using regex++ API Match expected but not found using POSIX API 35 lines, 10 tests completed in file test1252.txt **** returning with error code 10 ********** errors detected; see stdout for details ***********

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RE: [Boost-Users] shared_ptr and lazy copy
by Michael Davis 30 May '02

30 May '02

There is an implementation of the method you described (const and non-const versions of operator-> and operator*) at the following website: http://ootips.org/yonat/4dev/ Perhaps this guy might be talked into submitting it. -----Original Message----- From: Mark Storer To: 'Boost-Users(a)yahoogroups.com' Sent: 5/30/2002 1:35 PM Subject: [Boost-Users] shared_ptr and lazy copy Is there an easier way to use shared_ptr as a lazy copy method? It seems to me that the only way to do it would be by testing unique() (or use_count()) every time the pointed-to object was to be changed: boost::shared_ptr<foo> bar(new foo); boost::shared_ptr<foo> baz = bar; if(!baz->unique()) ... // make a deep copy baz->ChangeAFoo(); I can't think of a good way to alter shared_ptr either. The only thing I came up with would be const and non-const versions of operator-> and operator* where the non-const versions checked unique() and made a deep copy. This would seem to fall into that last question in the FAQ anyway... "Why doesn't shared_ptr provide (your pet feature here)". I'd think this could easily lead to unnecessary deep copies unless the programmer took explicit steps (lots of const_cast's) to avoid it. Am I missing anything? --Mark Storer Software Engineer Cardiff Software #include <disclaimer> typedef std::disclaimer<Cardiff> Discard; Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

1 0

shared_ptr and lazy copy
by Mark Storer 30 May '02

30 May '02

Is there an easier way to use shared_ptr as a lazy copy method? It seems to me that the only way to do it would be by testing unique() (or use_count()) every time the pointed-to object was to be changed: boost::shared_ptr<foo> bar(new foo); boost::shared_ptr<foo> baz = bar; if(!baz->unique()) ... // make a deep copy baz->ChangeAFoo(); I can't think of a good way to alter shared_ptr either. The only thing I came up with would be const and non-const versions of operator-> and operator* where the non-const versions checked unique() and made a deep copy. This would seem to fall into that last question in the FAQ anyway... "Why doesn't shared_ptr provide (your pet feature here)". I'd think this could easily lead to unnecessary deep copies unless the programmer took explicit steps (lots of const_cast's) to avoid it. Am I missing anything? --Mark Storer Software Engineer Cardiff Software #include <disclaimer> typedef std::disclaimer<Cardiff> Discard;

1 0

Problem with Boost.Thread and HP aCC
by raulh39 29 May '02

29 May '02

We are trying to compile Boost.Thread with HP aCC (with -AA option). In boost/function/function_base.hpp the compiler give us this error: Error 20: "function_base.hpp", line 37 # '<type name>' expected before '>'. template<bool> struct truth {}; We are using Boost 1.28.0. The line 37 in function_base.hpp has: template<bool> struct truth {}; We have found two ways to make it work: 1.- Comment out the line !! 2.- Replace with: template<bool a> struct truth {}; We think that the compiler is wrong but, is ok to comment this line? In earlier versions of this file this line doesn't exists, and it is never used, so it is necesary? Regards, Raúl.

2 1

RE: [Boost-Users] Problem with Boost.Thread and HP aCC
by Tom Matelich 29 May '02

29 May '02

When I first started trying to support aCC with Boost that was a common issue. Most of them were ferreted out. I don't think anybody is actively looking at that compiler, perhaps Jens Maurer still is. Anyway, the proper solution is to name the template parameter, your option 2. I've cc'ed Bill Kempf in case he doesn't follow this list. Tom Matelich -----Original Message----- From: raulh39 [mailto:rhuertas@tcpsi.es] Sent: Wednesday, May 29, 2002 10:15 AM To: Boost-Users(a)yahoogroups.com Subject: [Boost-Users] Problem with Boost.Thread and HP aCC We are trying to compile Boost.Thread with HP aCC (with -AA option). In boost/function/function_base.hpp the compiler give us this error: Error 20: "function_base.hpp", line 37 # '<type name>' expected before '>'. template<bool> struct truth {}; We are using Boost 1.28.0. The line 37 in function_base.hpp has: template<bool> struct truth {}; We have found two ways to make it work: 1.- Comment out the line !! 2.- Replace with: template<bool a> struct truth {}; We think that the compiler is wrong but, is ok to comment this line? In earlier versions of this file this line doesn't exists, and it is never used, so it is necesary? Regards, Raúl. Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

1 0

VC7, threads, and threads starting other threads
by Bill Eidson 28 May '02

28 May '02

Hi all, I am using boost 1.28 and the threads library on windows with VC7.Net. I am creating threads in a threadgroup use function objects. Inside of these threads, I am creating other threads again using function objects. The problem is at run time the debug environment is informing me of a call type collision indicating the return address/stack is set up incorrectly. The debug message: "The value of ESP was not properly saved across afunction call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention." this is in the declaration template<typename Functor> void assign_to(Functor f) { this->assign_to(f,tag()); } The error is at the end of the function First, is it legal in boost::thread to start one thread in another Second, If it is, what is going on with the function_template.hpp code here Thanks bille

1 0

problem with c_regex_traits.cpp
by René Gutschmidt 28 May '02

28 May '02

Hi, i have problems with the file c_regex_traits.cpp. I work under CodeWarrior 6/7 with a Macintosh. These problem ist with boost 1.25.1,1.26. template <class charT> unsigned int BOOST_REGEX_CALL re_get_message(charT* buf, unsigned int len, unsigned int id) { unsigned int size = _re_get_message((char*)0, 0, id); if(len < size) return size; boost::scoped_array<char> cb(new char[size]); _re_get_message(cb.get(), size, id); size = boost::c_regex_traits<wchar_t>::strwiden(buf, len, cb.get()); return size; } inline unsigned int BOOST_REGEX_CALL re_get_message(char* buf, unsigned int len, unsigned int id) { return _re_get_message(buf, len, id); } Is that a known problem? Do you know a workaround? (Renaming one of the 're_get_message()' functions does the job, but I'm not sure about the implications.) Regards, Rene

2 2

any_ptr
by cl_corba_at 27 May '02

27 May '02

Hi all! any_ptr was a typo in an older documentation, but this leads me to this question: any stores the type values in the template class holder, which is derived from placeholder to provide an uniform interface. This approach works fine for new classes where the data representation is done inside the any class, but for legacy code I would also like to have an any_ptr, which uses a holder that POINTS to a variable rather than containing it. With this I could extend existing classes with algorithms depending on any. Has any_ptr considered in the past and if yes, what have been the reasons to decide against it? Thanks in advance, CL

1 0

BGL, 6 degrees of Kevin Bacon and MSVC 6 compile error
by a_schweitzer 25 May '02

25 May '02

Hello, I am trying to build the "6 degrees of kevin bacon" example of the BGL in MSVC 6. When I do I get an "internal compile error". Does anyone know a fix/work-around? The compilation gets to this line (about #73): typedef adjacency_list < vecS, vecS, undirectedS, property<vertex_name_t,std::string >, property < edge_name_t,std::string > > Graph; Graph g; If Graph g is declared I get the following ugly error: d:\program files\microsoft visual studio\vc98\include\xmemory(59) : fatal error C1001: INTERNAL COMPILER ERROR (compiler file 'msc1.cpp', line 1794) Please choose the Technical Support command on the Visual C++ Help menu, or open the Technical Support help file for more information Note that if I change the std::string in vertex_name property to an int the compilation proceeds. Thanks for any help Andy Schweitzer

3 3

RE: [Boost-Users] boost::lexical_cast string to string problem - New proposition available
by Terje Slettebø 25 May '02

25 May '02

>--- In Boost-Users@y..., Tom Matelich <tmatelich@z...> wrote: > I and many others have requested fixes for this for a very long time. > Basically, it involves creating class templates to do the actual conversion. > It's not the most complicated system, just nobody has done it yet. If you > search the boost list archives, you'll see a lot of mail about this. There > is no quick solution to your problem though. I've searched the archive, now, and see that there's been quite a few propositions for changes, but apparently none of them have ended up in the lexical_cast implementation. There's also a couple of propositions, here (http://groups.yahoo.com/group/boost/files/lexical_cast_propositions/) Some of the proposed changes are: - wlexical_cast - A version that can use wide characters - basic_lexical_cast - A version that takes the interpreter (stringstream) as a parameter, to support things like changing locale - Being able to set number base (dec, oct or hex). This would be implicitly possible using basic_lexical_cast - Being able to set precision for numerical conversions. This may also be done with basic_lexical_cast - Checking for change of sign, when using unsigned numbers. This is addressed using an integer adapter, in the above lexical_cast_propositions One problem with doing these changes, after having talked with Kevlin Henney a while ago (without knowing it had been already proposed, I proposed an extra parameter, for setting the number base). is that he prefers to not have extra parameters in the interface, as it then will no longer look like a cast, and it may be less generic, depending on the way it's done. For example, a base-setting argument wouldn't make much sense if you converted from floating point to string. In any case, I have actually just now made a version of lexical_cast, that fixes the problem pointed out by OP, here, and I've made it available in the Boost files section (http://groups.yahoo.com/group/boost/files/lexical_cast_proposition/) I've also put a unit test for it, there. Feedback is welcome. It doesn't change the interface in any way, so it should be ok. The new version supports conversion between string and char, including char containing whitespace, and when the string is empty, or containing only whitespace. If the source or destination (or both) is basic_string or char/wchar_t, it will set the interpreter to use the char type used, so it implicitely supports wide characters. Wide character support requires partial specialisation if one of the operands is not either basic_string or char/wchar_t. In the case where the source is basic_string, it also uses pass by const reference, for efficiency. It's tested on Intel C++ 6.0, MSVC 6.0 and BCC 5.6. Regards, Terje

2 4

boost::shared_ptr and atomic_count_linux.hpp
by Jerry Napoli 24 May '02

24 May '02

Hi, I'm using boost version 1.27.0 on an x86 linux platform and have just upgraded my kernel to 2.4.18. After the upgrade, boost::shared_ptr fails to compile because functions such as "atomic_inc_and_test", "atomic_dec_and_test", etc.. which were previously defined in "atomic.h" are no longer defined there. I can get around the problem by using an older "atomic.h" or by using pthreads, but I was wondering why those functions were removed from the header. Any ideas? Thanks, Jerry jnapoli(a)iteamsolutions.com [Non-text portions of this message have been removed]

3 2

Seeking example of using quaternion class
by yg-boost-users＠m.gmane.org 23 May '02

23 May '02

Hi, I am trying to use the quaternion class for 3d rotation and wonder if anyone has a sample of how to do this. If we have quaterion q1 and want to rotate by q2 the expression, I believe, is result = q2 * q1 * inv( q2 ). Is the correct syntax using ::boost::quaternion operators result = q2 *= q1 /= q2 ?? Do the quats need to be "unit quaternions" before these operations? What is the best way to create an unit quat? thanks john ware

1 0

Re: [boost] boost::lexical_cast string to string problem - New proposition available
by Terje Slettebø 23 May '02

23 May '02

(This posting is also sent to the Boost list) Following a suggestion at the Boost User's list, I've updated the lexical_cast version in the Boost files section (http://groups.yahoo.com/group/boost/files/lexical_cast_proposition/) to use implicit conversion, where possible. This means it uses the fastest and most accurate conversion available, and only resorts to using stringstream when it has to. It uses boost::is_convertible for this. Even if that may not work on all compilers, if it doesn't work, it will just resort to using stringstream. However, this does mean that the semantics is changed slightly. In the cases where an implicit conversion exists, it may give a different result than if not, in the case of char/wchar_t. Without implict conversion, you get 1 -> '1'. With implicit conversion, you get 1 -> 1 (ASCII 1). As far as I can tell, this only affects conversions between char/wchar_t and other types, though. If this is a problem, please let me know, and I can change it to make an exception for char/wchar_t. Another thing is that there's now an option to configure the interpreter stream, as well. This is done _without_ changing the interface of lexical_cast. Instead, it's done in a trait-like fashion, by making the interpreter object available through an associated component, which is used by lexical_cast. The reason this is optional, is that when enabled, it relies on having a static stringstream object. This has two effects (unless implicit conversion is used): - It may well make lexical_cast faster, as it avoids the creation and destruction of a stringstream object, each time it's called. - Unless stringstream is reentrant, which is probably not the case, it means that when the option is enabled, lexical_cast is not thread safe. Therefore, this option is off by default, which gives the usual behaviour - stringstream objects are created at the function call. If the option is used, it lets you configure the stream used, in any way. This way, one can implement all the features of the "wish list" in the previous posting in this thread, such as. - wlexical_cast - A version that can use wide characters - This is already handled by the previous version. - basic_lexical_cast - A version that takes the interpreter (stringstream) as a parameter, to support things like changing locale - Being able to set number base (dec, oct or hex). This would be implicitly possible using basic_lexical_cast - Being able to set precision for numerical conversions. This may also be done with basic_lexical_cast - These are all handled now. - Checking for change of sign, when using unsigned numbers. This is addressed using an integer adapter, in the other lexical_cast_propositions The lack of formatting is what is largely the reason I haven't used lexical_cast much. With control over the formatting, it may be more widely applicable. Since the stream may be different, for different conversions (char, wchar_t or other character type), one need to supply the source and destination types, when configuring the stream. Here's an example of its use. --- Start --- #define BOOST_LEXICAL_CAST_STREAM // Enables stream configuration #include <iostream> #include <iomanip> #include <string> #include "lexical_cast.hpp" int main() { boost::lexical_cast_stream<std::string,double>::stream() << std::setprecision(0); std::cout << boost::lexical_cast<std::string>(1.0/3.0) << '\n'; boost::lexical_cast_stream<std::string,double>::stream() << std::setprecision(10); std::cout << boost::lexical_cast<std::string>(1.0/3.0) << '\n'; boost::lexical_cast_stream<std::string,int>::stream() << std::setbase(16); std::cout << boost::lexical_cast<std::string>(0x1234) << '\n'; } --- End --- This prints. 0.333333 0.3333333333 1234 Any suggestions for changes or additions, including interface changes, is welcome. I realise that the way to change the stream formatting is rather long-winded, but I haven't found a shorter way to do it (the name has to be different from lexical_cast, too). Suggestions for alternative ways are welcome. I've not found a way to make the stream configurable, and yet avoid a static stringstream. If the stringstream is created when lexical_cast is called, it means any configuration information is lost. Even if it copied the state from another stream, that other stream would have to exist, such as being static, so that would only move it. Despite the extra code, to handle implicit conversions, where available, by examining the resulting assembly output (from Intel C++), it's in fact able to optimise _all_ of it away, producing indentical code as if built in conversions were used directly. Here's an example. int n; double d=1.23; int main() { n=boost::lexical_cast<int>(d); } 00401084 fld qword ptr [d (00427db0)] 0040108A fstp qword ptr [esp+8] 0040108E mov esi,dword ptr [esp+8] 00401092 mov edx,dword ptr [esp+0Ch] 00401096 mov ecx,edx 00401098 shr ecx,14h 0040109B and ecx,7FFh 004010A1 cmp ecx,3FEh 004010A7 jle main+52h (004010c6) 004010A9 mov eax,edx 004010AB neg ecx 004010AD add ecx,41Eh 004010B3 shld eax,esi,0Bh 004010B7 or eax,80000000h 004010BC shr eax,cl 004010BE test edx,edx 004010C0 jge main+54h (004010c8) 004010C2 neg eax 004010C4 jmp main+54h (004010c8) 004010C6 xor eax,eax 004010C8 mov [n (0042bef8)],eax int n; double d=1.23; int main() { n=d; } 0041AFF0 fld qword ptr [d (00427db0)] 0041AFF6 fstp qword ptr [esp+8] 0041AFFA mov esi,dword ptr [esp+8] 0041AFFE mov edx,dword ptr [esp+0Ch] 0041B002 mov ecx,edx 0041B004 shr ecx,14h 0041B007 and ecx,7FFh 0041B00D cmp ecx,3FEh 0041B013 jle main+1A022h (0041b032) 0041B015 mov eax,edx 0041B017 neg ecx 0041B019 add ecx,41Eh 0041B01F shld eax,esi,0Bh 0041B023 or eax,80000000h 0041B028 shr eax,cl 0041B02A test edx,edx 0041B02C jge main+1A024h (0041b034) 0041B02E neg eax 0041B030 jmp main+1A024h (0041b034) 0041B032 xor eax,eax 0041B034 mov [n (0042b84c)],eax The code is identical. :) Thus, you get a generic conversion, with the speed and accuracy of built in conversions, where that is possible. It's a good thing I have a unit test, so I could do regression testing, to make sure I haven't broken anything. Regards, Terje

1 0

Problems with read_graphviz()
by Paolo Fosser 23 May '02

23 May '02

Hi to everybody, first of all I beg pardon if my English isn't much good: I'm Italian! I'm working with gcc 3.0.1 on a Linux Mandrake sys with kernel 2.4.8. The problem I'm having is that the second call of read_graphviz() in the same program causes a Segmentation fault. What can I do? Thank you in advance, Paolo PS Advices about the language are welcome too ;)

1 0

Boost thread examples
by imi123_1999 22 May '02

22 May '02

Is there any other site from where we can get the example programs illustrating the usage of boost libraries especially threads. I found the example programs present on boost web site not sufficient to fully understand the concepts. So please tell me from where i can get the further information regarding the usage of boost thread library.

3 2

Thread destruction in boost
by giltayar 21 May '02

21 May '02

>From boost:thread documentation, it is clear that deleting a thread does not kill the thread. I very much approve of this. killing a thread is a very "strong" operation. The problem is that there is now no connection between the system thread and the object itself, which (debatably) kills the idiom in C++ connection the object and the resource (I never remember its name). Was the idea of doing a "join()" in the dtor brought up? I.e., the dtor waiting for the thread to finish? I used it in my library, and it was _very_ effective, as I could _know_ that the thread and the object have parallel lifetimes, and it also helped me because it prevented many "thread-leakage" problems. Gil P.S. The question was - "Was the idea of doing a join() in the dtor ever brought up?"

3 5

RE: [Boost-Users] boost::lexical_cast string to string problem
by Tom Matelich 21 May '02

21 May '02

I and many others have requested fixes for this for a very long time. Basically, it involves creating class templates to do the actual conversion. It's not the most complicated system, just nobody has done it yet. If you search the boost list archives, you'll see a lot of mail about this. There is no quick solution to your problem though. -----Original Message----- From: Jason Fischl [mailto:yg-boost-users@m.gmane.org] Sent: Monday, May 20, 2002 5:21 PM To: boost-users(a)yahoogroups.com Subject: [Boost-Users] boost::lexical_cast string to string problem I'm seeing a problem with lexical_cast. The following code when trying to convert from string to string fails when passed an empty string. The library code that is doing this lexical_cast does not and can not know that the input and output types are the same. I believe that this code should not throw. #include <iostream> #include <boost/lexical_cast.hpp> main() { std::string input(""); try { boost::lexical_cast<std::string>(input); } catch (boost::bad_lexical_cast& e) { std::cout << "Failed" << std::endl; } } Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

1 0

random::mersenne_twister ctor and seed() methods
by klapshin 21 May '02

21 May '02

Hello All! I just started using boost/random project, and kind of confused with behavior of random::mersenne_twister constructor and seed method. The thing is that both of them have two flavors -- first accepting DataType, while second is template method accepting Generator. The problem is when I am trying innocent boost::mt19937 rng(999); //and/or rng.seed(999); wrong ctor/seed being invoked and I am getting far from crystal clear error message (term does not evaluate to a function). The problem is quite obvious: 999 is of type int, while DataType by default is unsigned long on my platform, so template version of ctor/seed picks this call, and it is failing since 999 is not a generator. So I have to write something like: boost::mt19937 rng(boost::mt19937::result_type(999)); which is kind of cumbersome. Why generator version of seed is not named differently? Say seed_gen? Don't know what to do with constructor though. PS: I am using boost_1_28_0, and MSVC 6.0. Best regards, Kirill Lapshin.

1 0

boost::lexical_cast string to string problem
by Jason Fischl 21 May '02

21 May '02

I'm seeing a problem with lexical_cast. The following code when trying to convert from string to string fails when passed an empty string. The library code that is doing this lexical_cast does not and can not know that the input and output types are the same. I believe that this code should not throw. #include <iostream> #include <boost/lexical_cast.hpp> main() { std::string input(""); try { boost::lexical_cast<std::string>(input); } catch (boost::bad_lexical_cast& e) { std::cout << "Failed" << std::endl; } }

3 3

BLL trouble
by Persson Jonas 21 May '02

21 May '02

Hello, I've just started playing around with BLL and i have some troubles using it with containers of shared_ptr. I have isolated the problem to: void lambdaTest() { using namespace boost::lambda; boost::shared_ptr<int> x(new int(5)); (*_1)(x); } This does not compile with gcc 3.1 on cygwin. If I use plain pointers it works as expected but not for shared_ptr. What am I doing wrong? / Jonas ---------------------------------------------------------------------------- ---- ../../cygwin/usr/local/include/g++-v3/bits/stl_iterator_base_types.h: In instantiation of `std::iterator_traits<boost::s hared_ptr<int> >': ../../libs/boost_1_28_0/boost/lambda/detail/operator_return_type_traits.hpp: 224: instantiated from `boost::lambda::det ail::contentsof_type<boost::shared_ptr<int> >' ../../libs/boost_1_28_0/boost/lambda/detail/lambda_traits.hpp:50: instantiated from `boost::lambda::detail::IF_type_ > >' ../../libs/boost_1_28_0/boost/lambda/detail/lambda_traits.hpp:58: instantiated from `boost::lambda::detail::IF_type<tr ue, boost::lambda::detail::contentsof_type<boost::shared_ptr<int> >, boost::lambda::detail::identity_mapping<boost::lamb da::detail::unspecified> >' ../../libs/boost_1_28_0/boost/lambda/detail/operator_return_type_traits.hpp: 317: instantiated from `boost::lambda::ret urn_type_1<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::shared_ptr<int>&>' ../../libs/boost_1_28_0/boost/lambda/detail/return_type_traits.hpp:92: instantiated from `boost::lambda::return_type_1 _prot<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::shared_ptr<int>&>' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:84 : instantiated from `boost::lambda::detail ::unary_rt<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::tuples::tuple<boost::lambda::lambda_fun ctor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boos t::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_ type, boost::tuples::null_type>, boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost::tuples:: null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:25 3: instantiated from `boost::lambda::lambd a_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action> , boost::tuples::tuple<boost::lambda::lambda _functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::n ull_type, boost::tuples::null_type> >::sig<boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_t ype, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' Main.cpp:150: instantiated from here ../../cygwin/usr/local/include/g++-v3/bits/stl_iterator_base_types.h:123: no type named `iterator_category' in `class boost::shared_ptr<int>' ../../cygwin/usr/local/include/g++-v3/bits/stl_iterator_base_types.h:124: no type named `value_type' in `class boost::shared_ptr<int>' ../../cygwin/usr/local/include/g++-v3/bits/stl_iterator_base_types.h:125: no type named `difference_type' in `class boost::shared_ptr<int>' ../../cygwin/usr/local/include/g++-v3/bits/stl_iterator_base_types.h:126: no type named `pointer' in `class boost::shared_ptr<int>' ../../cygwin/usr/local/include/g++-v3/bits/stl_iterator_base_types.h:127: no type named `reference' in `class boost::shared_ptr<int>' ../../libs/boost_1_28_0/boost/lambda/detail/operator_return_type_traits.hpp: In instantiation of `boost::lambda::detail: :contentsof_type<boost::shared_ptr<int> >': ../../libs/boost_1_28_0/boost/lambda/detail/lambda_traits.hpp:50: instantiated from `boost::lambda::detail::IF_type_ > >' ../../libs/boost_1_28_0/boost/lambda/detail/lambda_traits.hpp:58: instantiated from `boost::lambda::detail::IF_type<tr ue, boost::lambda::detail::contentsof_type<boost::shared_ptr<int> >, boost::lambda::detail::identity_mapping<boost::lamb da::detail::unspecified> >' ../../libs/boost_1_28_0/boost/lambda/detail/operator_return_type_traits.hpp: 317: instantiated from `boost::lambda::ret urn_type_1<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::shared_ptr<int>&>' ../../libs/boost_1_28_0/boost/lambda/detail/return_type_traits.hpp:92: instantiated from `boost::lambda::return_type_1 _prot<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::shared_ptr<int>&>' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:84 : instantiated from `boost::lambda::detail ::unary_rt<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::tuples::tuple<boost::lambda::lambda_fun ctor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boos t::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_ type, boost::tuples::null_type>, boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost::tuples:: null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:25 3: instantiated from `boost::lambda::lambd a_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action> , boost::tuples::tuple<boost::lambda::lambda _functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::n ull_type, boost::tuples::null_type> >::sig<boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_t ype, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' Main.cpp:150: instantiated from here ../../libs/boost_1_28_0/boost/lambda/detail/operator_return_type_traits.hpp: 224: no type named `reference' in `struct std::iterator_traits<boost::shared_ptr<int> >' ../../libs/boost_1_28_0/boost/lambda/detail/lambda_traits.hpp: In instantiation of `boost::lambda::detail::IF_type_<boos t::lambda::detail::contentsof_type<boost::shared_ptr<int> > >': ../../libs/boost_1_28_0/boost/lambda/detail/lambda_traits.hpp:58: instantiated from `boost::lambda::detail::IF_type<tr ue, boost::lambda::detail::contentsof_type<boost::shared_ptr<int> >, boost::lambda::detail::identity_mapping<boost::lamb da::detail::unspecified> >' ../../libs/boost_1_28_0/boost/lambda/detail/operator_return_type_traits.hpp: 317: instantiated from `boost::lambda::ret urn_type_1<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::shared_ptr<int>&>' ../../libs/boost_1_28_0/boost/lambda/detail/return_type_traits.hpp:92: instantiated from `boost::lambda::return_type_1 _prot<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::shared_ptr<int>&>' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:84 : instantiated from `boost::lambda::detail ::unary_rt<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::tuples::tuple<boost::lambda::lambda_fun ctor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boos t::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_ type, boost::tuples::null_type>, boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost::tuples:: null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:25 3: instantiated from `boost::lambda::lambd a_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action> , boost::tuples::tuple<boost::lambda::lambda _functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::n ull_type, boost::tuples::null_type> >::sig<boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_t ype, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' Main.cpp:150: instantiated from here ../../libs/boost_1_28_0/boost/lambda/detail/lambda_traits.hpp:50: no type named `type' in `struct boost::lambda::detail::contentsof_type<boost::shared_ptr<int> >' ../../libs/boost_1_28_0/boost/lambda/detail/lambda_traits.hpp: In instantiation of `boost::lambda::detail::IF_type<true, boost::lambda::detail::contentsof_type<boost::shared_ptr<int> >, boost::lambda::detail::identity_mapping<boost::lambda: :detail::unspecified> >': ../../libs/boost_1_28_0/boost/lambda/detail/operator_return_type_traits.hpp: 317: instantiated from `boost::lambda::ret urn_type_1<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::shared_ptr<int>&>' ../../libs/boost_1_28_0/boost/lambda/detail/return_type_traits.hpp:92: instantiated from `boost::lambda::return_type_1 _prot<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::shared_ptr<int>&>' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:84 : instantiated from `boost::lambda::detail ::unary_rt<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::tuples::tuple<boost::lambda::lambda_fun ctor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boos t::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_ type, boost::tuples::null_type>, boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost::tuples:: null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:25 3: instantiated from `boost::lambda::lambd a_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action> , boost::tuples::tuple<boost::lambda::lambda _functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::n ull_type, boost::tuples::null_type> >::sig<boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_t ype, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' Main.cpp:150: instantiated from here ../../libs/boost_1_28_0/boost/lambda/detail/lambda_traits.hpp:58: no type named `type' in `struct boost::lambda::detail::IF_type_<boost::lambda::detail::contentsof_type<boost ::shared_ptr<int> > >' ../../libs/boost_1_28_0/boost/lambda/detail/operator_return_type_traits.hpp: In instantiation of `boost::lambda::return_ type_1<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::shared_ptr<int>&>': ../../libs/boost_1_28_0/boost/lambda/detail/return_type_traits.hpp:92: instantiated from `boost::lambda::return_type_1 _prot<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::shared_ptr<int>&>' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:84 : instantiated from `boost::lambda::detail ::unary_rt<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::tuples::tuple<boost::lambda::lambda_fun ctor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boos t::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_ type, boost::tuples::null_type>, boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost::tuples:: null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:25 3: instantiated from `boost::lambda::lambd a_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action> , boost::tuples::tuple<boost::lambda::lambda _functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::n ull_type, boost::tuples::null_type> >::sig<boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_t ype, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' Main.cpp:150: instantiated from here ../../libs/boost_1_28_0/boost/lambda/detail/operator_return_type_traits.hpp: 317: no type named `type' in `struct boost::lambda::detail::IF_type<true, boost::lambda::detail::contentsof_type<boost::shared_ptr<int> >, boost::lambda::detail::identity_mapping<boost::lambda::detail::unspecified> >' ../../libs/boost_1_28_0/boost/lambda/detail/return_type_traits.hpp: In instantiation of `boost::lambda::return_type_1_pr ot<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::shared_ptr<int>&>': ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:84 : instantiated from `boost::lambda::detail ::unary_rt<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::tuples::tuple<boost::lambda::lambda_fun ctor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boos t::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_ type, boost::tuples::null_type>, boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost::tuples:: null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:25 3: instantiated from `boost::lambda::lambd a_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action> , boost::tuples::tuple<boost::lambda::lambda _functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::n ull_type, boost::tuples::null_type> >::sig<boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_t ype, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' Main.cpp:150: instantiated from here ../../libs/boost_1_28_0/boost/lambda/detail/return_type_traits.hpp:92: no type named `type' in `struct boost::lambda::return_type_1<boost::lambda::other_action<boost::lambda::cont entsof_action>, boost::shared_ptr<int>&>' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp: In instantiation of `boost::lambda::detail::u nary_rt<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::tuples::tuple<boost::lambda::lambda_functo r<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost:: tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_typ e, boost::tuples::null_type>, boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost::tuples::nul l_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::t uples::null_type, boost::tuples::null_type, boost::tuples::null_type> >': ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:25 3: instantiated from `boost::lambda::lambd a_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action> , boost::tuples::tuple<boost::lambda::lambda _functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::n ull_type, boost::tuples::null_type> >::sig<boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost ::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_t ype, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' Main.cpp:150: instantiated from here ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:84 : no type named `type' in `struct boost::lambda::return_type_1_prot<boost::lambda::other_action<boost::lambda: :contentsof_action>, boost::shared_ptr<int>&>' ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp: In instantiation of `boost::lambda::lambda_fu nctor_base<boost::lambda::other_action<boost::lambda::contentsof_action>, boost::tuples::tuple<boost::lambda::lambda_fun ctor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boos t::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_ type, boost::tuples::null_type> >::sig<boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost::tu ples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >': Main.cpp:150: instantiated from here ../../libs/boost_1_28_0/boost/lambda/detail/operator_lambda_func_base.hpp:25 3: no type named `type' in `class boost::lambda::detail::unary_rt<boost::lambda::other_action<boost::lambda::c ontentsof_action>, boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholde r<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>, boost::tuples::tuple<boost::shared_ptr<int>&, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >' Main.cpp: In function `void lambdaTest()': Main.cpp:150: no match for call to `(const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lamb da::other_action<boost::lambda::contentso f_action>, boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholde r<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >) (boost::shared_ptr<int>&)' ../../libs/boost_1_28_0/boost/lambda/detail/lambda_functors.hpp:142: candidates are: T::sig<boost::tuples::null_type>::type boost::lambda::lambda_functor<Base>::operator()() const [with T = boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda ::contentsof_action>, boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholde r<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >]

1 0

RE: [Boost-Users] Graphs: vertex_index vs. edge_index
by Siegel, Matthew 20 May '02

20 May '02

Hi Jeremy, Thanks for the quick response. As you may or may not recall from last week, I am having the issue with MSVC++, where I can not put more than one property per edge or vertex when defining the graph, that limits the size of the template expansion. Because of this, I have to use external property maps that I create myself. Therefore I need an edge index map internal to the graph. Currently my workaround is to keep an unsigned integer in my class, that gets incremented until there's a free "slot" for the edge to go into. This is to allow the increment of the unsigned int to roll at maximum value. Here's the way I think it should work. I understand the space issues that most people would be concerned about, however if a property_map of edge_index_t is explicitly given in the list of edge properties when the graph is defined, then the map should be created automatically for me, and if an index is not provided on the add_edge() function, the index is incremented in the same fashion. If I'm explicitly adding the edge_index map to my graph, then the space is of no concern to me. Just a thought . . .thanks again, Matt -----Original Message----- From: Jeremy Siek [mailto:jsiek@cs.indiana.edu] Sent: Monday, May 20, 2002 12:01 PM To: 'Boost-Users(a)yahoogroups.com' Subject: Re: [Boost-Users] Graphs: vertex_index vs. edge_index Hi Matt, On Mon, 20 May 2002, Siegel, Matthew wrote: > Please correct me if I'm wrong. It seems as if a vertex_index gets > assigned to a vertex as it's added to the graph automatically. > However, this doesn't seem to be the case for the edge_index. > > Is this correct?? That is mostly correct. The vertex_index gets assigned automatically for adjacency_list with VertexList=vecS but not with VertexList=listS. You are right about edge_index. > I forsee the following problem. With the graph implemented using a > std::vector for both the vertex list and the edge list, if a vertex is > removed from the graph the index is corrected for the > vertex_descriptor to the new, appropriate index. However, if an edge Right. All vertices are re-indexed, so that after the removal the remaining indices go from 0 to num_vertices-1 > is removed, the index for the edge_descriptor will not be corrected > with the removal of an element in the vector. Also, this causes > headaches when using an external property map. The edge index is > linked directly to a location in my map. > > Any solutions for these problems?? The reason edge_index is not provided automatically is because it takes up space (whereas the vertex_index is does not), and some users are concerned about space issues. Anyways, one possible solution is to somehow make it possible for you to specify some code to be executed when an edge is added or removed from the graph, and this code would adjust the edge indices, and perhaps the external storage too. But before I get ahead of myself, could you describe how you currently work around this problem, and perhaps how you'd like to see it work? Cheers, Jeremy ---------------------------------------------------------------------- Jeremy Siek http://www.osl.iu.edu/~jsiek/ Ph.D. Student, Indiana Univ. B'ton email: jsiek(a)osl.iu.edu C++ Booster (http://www.boost.org) office phone: (812) 855-3608 ---------------------------------------------------------------------- Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

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Graphs: vertex_index vs. edge_index
by Siegel, Matthew 20 May '02

20 May '02

Hi, Please correct me if I'm wrong. It seems as if a vertex_index gets assigned to a vertex as it's added to the graph automatically. However, this doesn't seem to be the case for the edge_index. Is this correct?? I forsee the following problem. With the graph implemented using a std::vector for both the vertex list and the edge list, if a vertex is removed from the graph the index is corrected for the vertex_descriptor to the new, appropriate index. However, if an edge is removed, the index for the edge_descriptor will not be corrected with the removal of an element in the vector. Also, this causes headaches when using an external property map. The edge index is linked directly to a location in my map. Any solutions for these problems?? Thanks, Matt

2 1

newbie question
by the_3_project 20 May '02

20 May '02

How do I compile a program that uses the libregex program? It seems that whenever I do this: $ gcc -o te1 te1.cc -lboost_regex I get: ---- /tmp/cc9r42Gv.o: In function `boost::reg_expression<char, boost::regex_traits<char>, allocator<char> >::fail(unsigned int)': /tmp/cc9r42Gv.o(.boost::reg_expression<char, boost::regex_traits<char>, allocator<char> >::gnu.linkonce.t.fail(unsigned int)+0x4e): undefined reference to `boost::bad_expression::bad_expression(basic_string<char, string_char_traits<char>, __default_alloc_template<true, 0> > const &)' /tmp/cc9r42Gv.o: In function `boost::reg_expression<char, boost::regex_traits<char>, allocator<char> >::compile_set_aux(boost::re_detail::jstack<basic_string<char, string_char_traits<char>, __default_alloc_template<true, 0> >, allocator<char> > &, boost::re_detail::jstack<basic_string<char, string_char_traits<char>, __default_alloc_template<true, 0> >, allocator<char> > &, boost::re_detail::jstack<unsigned int, allocator<char> > &, boost::re_detail::jstack<basic_string<char, string_char_traits<char>, __default_alloc_template<true, 0> >, allocator<char> > &, bool, boost::re_detail::_narrow_type const &)': . . . ---- Here is the source to te1.cc ---- #include <iostream> #include <string> #include <boost/regex.hpp> using namespace boost; int main(int argc, char *argv[]) { cmatch what; string str = "XXyX"; regex expression("(\\S\\S){[Ayw]}(\\S)/"); if(regex_match(str,what,expression)) { cout << "what" << endl; } else { cout << "Shit\n"; } return 0; } -------- What am I doing wrong?

3 2

adjacency_list.cpp
by Louis Lavery 20 May '02

20 May '02

Hello, I've bought the book (BGL) and am trying to compile boost_1_27_0/boost/libs/example/adjacency_list.cpp but... ...MSVC6 spits out the dreaded "fatal error C1001: INTERNAL COMPILER ERROR". Intel 5's first (of many) error is e:/boost_1_27_0/boost/detail/iterator.hpp(204) : error: class "std::list<_Ty, _A>::iterator [with _Ty=boost::list_edge<boost::detail::adj_list_gen<boost::adjacency_list<boost ::vecS, boost::listS, boost::undirectedS, boost::property<boost::vertex_ind ex_t, size_t={unsigned int}, boost::property<boost::vertex_color_t, boost::default_color_type, boost::no_property>>, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits<char>, std::allocator<char>>}, boost::no_property>, boost::no_property, boost::listS>, boost::listS, boost::vecS, boost::undirectedS, boost::property<boost::vertex_index_t, size_t={unsigned int}, boost::property<boost::vertex_color_t, boost::default_color_type, boost::n o_property>>, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits<char>, std::allocator<char>>}, boost::no_property>, boost::no_property, boost::listS>::config::vertex_descriptor={boost::adjacency_list_traits<boost ::vecS, boost::listS, boost::undirectedS>::vertex_descriptor={boost::ct_if_t<boost::adjacency_list _traits<boost::vecS, boost::listS, boost::undirectedS>::is_rand_a ccess={boost::detail::is_random_access<boost::listS>::type={boost::false_typ e}}, size_t={unsigned int}, boost::adjacency_list_traits<boost::vecS, boost::listS, boost::undirectedS>::vertex_ptr={void *}>::type={boost::adjacency_list_traits<boost::vecS , boost::listS, boost::undirectedS>::vertex_ptr={void *}}}}, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits<char>, std::allocator<char>>}, boost::no_property>>, _A=std::allocator<boost::list_edge<bo ost::detail::adj_list_gen<boost::adjacency_list<boost::vecS, boost::listS, boost::undirectedS, boost::property<boost::vertex_index_t, size_t={unsigned int}, boost::property<boost::vertex_color_t, boost::default_color_type, boost::no_property>>, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits<char>, std::allocator<char>>}, boost::no_property>, boost::no_property, boost::listS>, boost::listS, boost::vecS, boost::undirectedS, boost::property <boost::vertex_index_t, size_t={unsigned int}, boost::property<boost::vertex_color_t, boost::default_color_type, boost::no_property>>, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits<char>, std::allocator<char>>}, boost::no_property>, boost::no_property, boost::listS>::config::vertex_descriptor={boost::adjacency_list_traits<boost ::vecS, boost::listS, boost::undirectedS>::vertex_descriptor={boost::ct_if_t<boost::adjacency_list _traits<boost::vecS, boost::listS, boost::undirectedS>::is_rand_access={boost::detail::is_random_access<boost:: listS>::type={boost::false_type}}, size_t={unsigned int}, boost::adjacency_list_traits<boost::vecS, boost::listS, boost::undirectedS>::vertex_ptr={void *}>::type={boost::adjacency_list_traits<boost::vecS, boost::listS, boost::undirectedS>::vertex_ptr={void *}}}}, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits <char>, std::allocator<char>>}, boost::no_property>>>]" has no member "difference_type" typedef typename Iterator::difference_type difference_type; My last hope gcc 2.95.2 comes up with... In file included from e:\boost_1_27_0\boost\detail\numeric_traits.hpp:69, from e:\boost_1_27_0\boost\counting_iterator.hpp:57, from e:\boost_1_27_0\boost\pending\integer_range.hpp:15, from e:\boost_1_27_0\boost\graph\detail\adjacency_list.hpp:34, from e:\boost_1_27_0\boost\graph\adjacency_list.hpp:293, from adjacency_list.cpp:31: e:\boost_1_27_0\boost\cstdint.hpp:163: parse error e:\boost_1_27_0\boost\cstdint.hpp:171: #error defaults not correct; you must hand modify boost/cstdint.hpp I'd like to get it working with MSVC6 or Intel5. Any help much appreciated. Louis.

3 4

BLL for other compilers than GCC and Kai C++
by tslettebo1 19 May '02

19 May '02

Hi all. Have anybody got the Boost Lambda Library to work on other compilers than GCC and Kai C++ (which are mentioned in the documentation)? I have Intel C++ 6.0, which is quite standards compliant, but I get a zillion error messages, just by trying to compile boost/libs/lambda/test/bind_tests_simple.hpp. Trying it with MSVC 6.0 gives an ICE, but that's hardly unexpected. :) Also, are there any plans, on ongoing work, to make it more portable? (I post here, rather than the Boost list, as it's about use of a library) Regards, Terje

1 0

Boost threads compile with Sun WS6U2?
by NYSSEN Peter (BMB) 18 May '02

18 May '02

Hi all, I'm working on a multithreaded application on Sun Solaris 8 with Sun Workshop 6 update 2 installed. Currently my application uses the pthreads library. I've been looking at the Boost.threads library and I would like to use this instead of pthreads. I see that the Sun WS compiler is not in the supported toolsets list and there is no appropriate jam file available. In the Compiler Status: solaris page I see that this compiler is being tested, but no refference to the threads lib. Can anybody point me in the right direction as how I should build this lib in my environment? Is it enough if I try to create a jam file? Has anybody already done this (preferably for release 1_28)? What is the reason this compiler is not in the supported toolsets list? Kind regards, Peter Nyssen **** DISCLAIMER **** "This e-mail and any attachment thereto may contain information which is confidential and/or protected by intellectual property rights and are intended for the sole use of the recipient(s) named above. Any use of the information contained herein (including, but not limited to, total or partial reproduction, communication or distribution in any form) by other persons than the designated recipient(s) is prohibited. If you have received this e-mail in error, please notify the sender either by telephone or by e-mail and delete the material from any computer". Thank you for your cooperation. For further information about Proximus mobile phone services please see our website at http://www.proximus.be or refer to any Proximus agent.

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Graph: Multiple edge properties with MSVC
by Siegel, Matthew 18 May '02

18 May '02

Hi, First off . . . great graph library. I can not get Visual C++ 6 SP5 to compile when I try to put multiple properties on the edges. Seems like a problem with the 3rd parameter that a boost::property can take another boost::property. When the 2nd property is taken out of the edge property list, everything works fine. Thanks for the help! Matt Example: // Vertex property - name as a string typedef boost::property<boost::vertex_name_t, std::string> VertexProperties; // Edge property - name as string, weight as a double typedef boost::property< boost::edge_weight_t, double, boost::property< boost::edge_name_t, std::string> > EdgeProperties; // Graph definition typedef boost::adjacency_list< boost::vecS, // Store out-edges in a std::vector boost::vecS, // Store vertex set in a std::vector boost::directedS, // Graph is directed VertexProperties, // Vertex properties EdgeProperties> Graph; // Edge properties Produces the following compiler error: Compiling... routetable.cpp c:\dev\lib\stlport-4.5.3\stlport\stl\char_traits.h(138) : fatal error C1001: INTERNAL COMPILER ERROR (compiler file 'msc1.cpp', line 1794) Please choose the Technical Support command on the Visual C++ Help menu, or open the Technical Support help file for more information Error executing cl.exe. routing.exe - 1 error(s), 0 warning(s)

3 2

Boost in Visual C++ 6.0
by imi123_1999 17 May '02

17 May '02

I am a newbie so please help me a little. I am using Visual C++ 6.0 in order to compile a program given as an example of threads. I am also copying the program below. But the problem is that the program is giving errors of unresolved externals. Please tell me how to change the settings of VC++ options. Here is the program: #include <boost/thread/thread.hpp> #include <iostream> int count = 0; boost::mutex mutex; void increment_count() { boost::mutex::lock lock(mutex); std::cout << "count = " << ++count << std::endl; } int main(int argc, char* argv[]) { boost::thread_group threads; for (int i = 0; i < 10; ++i) threads.create_thread(&increment_count); threads.join_all(); } The errors i am getting are: C:\Windows\Desktop\threadImI\imi.cpp(9) : error C2039: 'lock' : is not a member of 'mutex' c:\program files\microsoft visual studio\vc98 \include\boost\thread\mutex.hpp(35) : see declaration of 'mutex' C:\Windows\Desktop\threadImI\imi.cpp(9) : error C2065: 'lock' : undeclared identifier C:\Windows\Desktop\threadImI\imi.cpp(9) : error C2146: syntax error : missing ';' before identifier 'lock' C:\Windows\Desktop\threadImI\imi.cpp(19) : warning C4508: 'main' : function should return a value; 'void' return type assumed Error executing cl.exe. Creating browse info file... threadImI.exe - 3 error(s), 3 warning(s)

2 4

RE: [Boost-Users] Boost threads compile with Sun WS6U2?
by schalk_cronje＠nai.com 17 May '02

17 May '02

> I'm working on a multithreaded application on Sun Solaris 8 with Sun > Workshop 6 update 2 installed. > Currently my application uses the pthreads library. > I've been looking at the Boost.threads library and I would like to use > this instead of pthreads. We use it with suncc and build it from a makefile. (We don't actually build any of the boost libs using Jam).

1 0

Call for Volunteers
by William E. Kempf 16 May '02

16 May '02

The Boost-install mail list is up and running (http://lists.boost.org/mailman/listinfo.cgi/boost-install to subscribe), and several people have subscribed. However, traffic is non-existent on the list. I'm concerned that the effort will die if we don't start some momentum. Currently, I have 4 people who volunteered to help with this effort. Hopefully these volunteers are just pressed for time right now and will start contributing shortly, but in any event we need more volunteers. So, I'm calling on people once again. The goal is to create a set of procedures for both the Boost developers and the Boost "installers" that will facilitate the creation of an installation "script" or set of "scripts" for supported platforms. The volunteers will help to define the procedures and to implement the "script(s)" for the target platforms so that Boost users can easily install Boost for use. We need volunteers with a lot of different qualifications. We need someone familiar with every supported platform (I don't mean that a single volunteer needs to know every platform) so that we can insure we define the procedures correctly and can provide an installation solution for every platform. We need people to help us document the procedures and to code the "script(s)". If you're interested in helping with this effort, please join the Boost-install list and let us know how you'd like to contribute. Thanks, Bill Kempf

1 0

Boost 1.28.0 released
by Beman Dawes 16 May '02

16 May '02

Boost release 1.28.0 is available. See the www.boost.org home page for news of what's in the release, how to download, and how to build. (Remember that only the Python, Regex, and Thread libraries currently require a build; the others are entirely implemented in the headers.) This is a major release, with both new libraries and lots of general improvements. Much effort has gone into smoothing out the build process for those who use the Python, Regex, and Thread libraries. Among other changes, the release .zip and .tar.gz files are being built via a new procedure, using CVS export. Please let me know right away if you have any problems with either file. --Beman

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RE: [Boost-Users] unit testing framework for c++ in boost?
by bjorn.karlsson＠readsoft.com 16 May '02

16 May '02

Parts of this thread is becoming OT. It's fine to discuss libraries outside of Boost for comparison with their Boost equivalents, but the main topic must be about Boost. Bjorn Karlsson Moderator [Non-text portions of this message have been removed]

1 0

unit testing framework for c++ in boost?
by srivatsan raghavan 16 May '02

16 May '02

anyone know if there are plans to write a unit testing framework in boost? i've checked out unit++ , the interface doesn't seem very intuitive, and it seems rather feature limited and i kinda like CppUnit, but i get the feeling that since it's very similar to JUnit's interface, it's not as c++ friendly as it could be .. anyone know? __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com

6 6

boost::shared_ptr and NULL
by Andrew R. Thomas-Cramer 14 May '02

14 May '02

In this function declaration, is there a simpler way to express a null shared pointer as the default argument value? void foo( const boost::shared_ptr<T> & p = boost::shared_ptr<T>( ) ); In this function call, is there a simpler way to express a null shared pointer as the actual argument? foo( boost::shared_ptr<T>( ) ); ----------------------------------------------------------------------- Andrew R. Thomas-Cramer Work: artc(a)prism-cs.com http://www.prism-cs.com/ Home: artc(a)execpc.com http://www.execpc.com/~artc/ ----------------------------------------------------------------------- [Non-text portions of this message have been removed]

3 6

Building regex - VC6 SP5 + stlport
by boolean_dream 14 May '02

14 May '02

Hey all, In the past I've had no problems building with this combo, but recently did a system reinstall and got the latest versions and am having trouble. Using: - Boost 1.27.0 - VC6 with SP5 - STLport 4.5.3 STLport is in the INCLUDE and LIB variables as instructed and to complie I just type nmake vc6-stlport.mak from libs\regex\build. After a lot of sutff compling fine I get the below error... I was actually able to fix it by adding in some ifdefs in regex.hpp, but that caused some other problems - clearly I'm doing something wrong. Any ideas? Many thanks. cl /nologo /MTd /W3 /Gm /EHa /Zi /Od /I..\..\..\ /DWIN32 /D_MT /D_DE BUG /D_MBCS /D_LIB /YX /FD /GZ /c -Fpvc6-stlport/vc6-stlport- re300dm/vc6-stlport- re300dm.pch -Fo./vc6-stlport/vc6-stlport-re300dm/ -Fdvc6-stlport/vc6- stlport-re3 00dm.pdb ../src/cregex.cpp cregex.cpp ..\..\..\boost/regex.hpp(402) : error C2011: 'regex_iterator_traits<char *>' : ' struct' type redefinition ..\..\..\boost/regex.hpp(404) : error C2011: 'regex_iterator_traits<char const * >' : 'struct' type redefinition ..\..\..\boost/regex.hpp(407) : error C2011: 'regex_iterator_traits<unsigned sho rt *>' : 'struct' type redefinition ..\..\..\boost/regex.hpp(409) : error C2011: 'regex_iterator_traits<unsigned sho rt const *>' : 'struct' type redefinition NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop.

2 1

boost::shared_ptr<const T>
by Andrew R. Thomas-Cramer 13 May '02

13 May '02

Is it legal to construct a boost::shared_ptr<const T> from a raw T*? On MSVC6, it produces errors when class T has an implicit destructor, but compiles without error otherwise. ----------------------------------------------------------------------- Andrew R. Thomas-Cramer Work: artc(a)prism-cs.com http://www.prism-cs.com/ Home: artc(a)execpc.com http://www.execpc.com/~artc/ ----------------------------------------------------------------------- [Non-text portions of this message have been removed]

2 3

Re: building Boost using Jam
by jd.schmidt＠juno.com 13 May '02

13 May '02

OK, so I invoked Jam from my Boost root directory using: c:\boost_1_27_0\boost-build\jam -sBOOST_ROOT=. -sTOOLS="msvc" Now Jam is actually doing something, but I'm still getting messages like: The system cannot find the specified path. C:\Program is not recongnized as an internal or external command, operable program or batch file Also, I get a lot of messages like: ...found 1606 targets... ...updating 381 targets... [many other messages] ...failed msvc-C++-action [many other messages] ...failed updating 168 targets... ...skipped 202 targets... ...updated 11 targets... Obviously some things are happening, but I get the idea that it didn't work 100%. Do you have any advice? ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/web/.

5 4

Re: new boost.jam prebuilt's are available
by Jon Scobie 13 May '02

13 May '02

Toon, got jam to build from the latest CVS thanks but the libraries just refuse to build with vacpp. I started fixing some of the headers but have become stumped at these :- (this is just an excerpt) "./boost/regex.hpp", line 529.13: 1540-1628 (S) Every template parameter for a c onstructor template must be used in the parameter list of the constructor. "./boost/regex/detail/instances.hpp", line 104.10: 1540-0120 (S) The out of line member definition "boost::reg_expression<char,boost::regex_traits<char>,boost:: detail::allocator<char> >" of an explicit specialization should not use a templa te prefix. "./boost/regex/detail/instances.hpp", line 105.10: 1540-0120 (S) The out of line member definition "boost::reg_expression<char,boost::regex_traits<char>,boost:: detail::allocator<char> >" of an explicit specialization should not use a templa te prefix. "./boost/regex/detail/instances.hpp", line 106.10: 1540-0120 (S) The out of line member definition "boost::reg_expression<char,boost::regex_traits<char>,boost:: detail::allocator<char> >" of an explicit specialization should not use a templa te prefix. "./boost/regex/detail/instances.hpp", line 107.10: 1540-0120 (S) The out of line member definition "boost::reg_expression<char,boost::regex_traits<char>,boost:: detail::allocator<char> >" of an explicit specialization should not use a templa te prefix. Is boost completely broken on AIX vacpp v5.0.2? Jon. --- Toon Knapen <toon.knapen(a)si-lab.com> wrote: > You can find the new links in the CVS on the RC_1_28_0 branch. The difference > > is that this time, they point to a bjam.gz (remark the leading `b`) instead > of jam.gz. > __________________________________________________ Do You Yahoo!? Everything you'll ever need on one web page from News and Sport to Email and Music Charts http://uk.my.yahoo.com

2 1

Boost 1.27.0 on AIX 4.3.3
by scobiej 13 May '02

13 May '02

Hi, I've looked at all the documentation I can find on building boost on AIX for vacpp. However, I just can't get it to build! I'm using the prebuilt jam executable (not the one I built myself as it doesn't work - yacc stack overflow problems) and this is what I get :- bash-2.01$ jam -sBOOST_ROOT=. -sTOOLS="vacpp" status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:205: in link-fail status/Jamfile:237: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:205: in link-fail status/Jamfile:238: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:293: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:294: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:295: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:296: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:297: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:298: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:299: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:205: in link-fail status/Jamfile:300: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:197: in run-fail status/Jamfile:305: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:332: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:347: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:348: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:368: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope Unable to load Boost.Build, it seems that the build system files were located, but the build system is not defined. Attempted to use, as the bootstrap, this file: ./tools/build/boost-build.jam. This means that even though that file was loaded it either failed to directly load the build system files, or it failed to specify where to find and load the files by calling the 'build-system [path] ;' rule. Please consult the documentation at 'http://www.boost.org'. bash-2.01$ Any help would be appreciated! Thanks, Jon.

4 3

Boost.Thread (VC specific)
by judoka1981 13 May '02

13 May '02

Hi, would there be any problem in generating a .pdb file for libboost_thread? I'm using Boost 1.27.0 and VC.NET. Also, would it be possible to switch on generation of debug information for release builds as well? Regards // Johan

5 11

RE: [Boost-Users] Re: building Boost using Jam
by Tom Matelich 10 May '02

10 May '02

>Don't know which version of boost jam you are using, the version I'm >using does not support windows long file names with spaces so >virtually all targets fail due to bad include paths, and I decided >not to hack my VC installation just to let JAM build. So use the short names. It's a bit of pain to track them down, but they don't have any spaces.

3 2

RE: [Boost-Users] Re: building Boost using Jam
by Tom Matelich 10 May '02

10 May '02

For cvs, I use WinCVS. Best gui I've seen. www.cvsgui.org -----Original Message----- From: dmarsh26us [mailto:david.marsh10@ntlworld.com] Sent: Friday, May 10, 2002 9:57 AM To: Boost-Users(a)yahoogroups.com Subject: [Boost-Users] Re: building Boost using Jam Any general tips on general open source use, would be good also if you have a moment. For example are there better enviroments for a Win 2k setup? Should I use GCC instead? Where can I get a Win 2k version of cvs for source forge? The boost site is a bit light on help for us newbies! Have 6 years C++ but mainly on windows ;)

1 0

prebuild jam-exec's
by Toon Knapen 10 May '02

10 May '02

As previously only posted to the boost-ml (and not the boost-users-ml), the current prebuild jam-execs are not compatible with old revisions of boost nor can they compile the current CVS due to many usefull updates in boost.jam which will ease building boost in the future. There has been a lot of hard work done by David, Rene and Vladimir to have a stable boost.build for building the upcoming Version_1_28 of boost. On monday, updates of the prebuild exec's will be made available through the boost website. Until then, you can compile your own jam executable by just doing a`make YYACC=` in the tools/build/jam_src subdirectory of boost.

1 0

Smart pointers and overloading
by artc_prismcs 10 May '02

10 May '02

The marked call in the code below requires implicit conversion between compatible shared pointer types. At least two compilers (MSVC6 and Sun Workshop6) consider the marked call ambiguous. Remove the second overloaded() function, and the marked call is compiled without error. Replace all the shared pointers by raw, and all three calls to the overloaded methods would be resolved correctly. Is this a shortcoming of the compilers, boost::shared_ptr or the language? #include <boost/shared_ptr.hpp> class MyType { }; class DerivedType : public MyType { }; class OtherType {}; void overloaded( const boost::shared_ptr<MyType> & p ) {} void overloaded( const boost::shared_ptr<OtherType> & p ) {} int main() { boost::shared_ptr<MyType> pm( new MyType() ); boost::shared_ptr<DerivedType> pd( new DerivedType() ); boost::shared_ptr<OtherType> po( new OtherType() ); overloaded( pm ); overloaded( pd ); // Compilers complain of ambiguous call to overloaded function. overloaded( po ); return 0; }

2 1

socket library
by Phil Nash 10 May '02

10 May '02

Hi all, Does anyone know what the state of the socket library is? I remember it getting started sometime last year, and there is an implementation in the files section on Yahoo, but that is far from complete and is all I can find. Has it gone off the boil or is someone still looking after it? Many thanks, [)o IhIL..

1 1

Re: [Boost-Users] Re: build setup - what have I missed?
by dick.bridges＠tais.com 10 May '02

10 May '02

Ok. I went back and built bjam and jam from .\tools\build\jam_src. Then I tried: /path-to-jam/jam -sBOOST_ROOT=. sTOOLS=msvc and got: <result> Couldn't find Python 2.1 installation in c:/tools/python skipping Boost.Python library build You can configure the location of your python installation, by setting: PYTHON_ROOT - currently "c:/tools/python" PYTHON_VERSION - currently "2.1" The following are automatically configured from PYTHON_ROOT if not otherwise set PYTHON_INCLUDES - path to Python #include directories; currently PYTHON_LIB_PATH - path to Python library; currently "c:/tools/python/libs" "c:/tools/python/PCBuild" PYTHON_STDLIB_PATH - path to Python standard library modules; currently "c:/tools/python/Lib" D:\dev\boost\tools\build\allyourbase.jam:609: in C++ warning: unknown rule C++-action D:\dev\boost\tools\build\allyourbase.jam:1065: in Object D:\dev\boost\tools\build\allyourbase.jam:1122: in Objects <snip> D:\dev\boost\tools\build\boost-base.jam:1751: in lib libs\thread\build\Jamfile:59: in load-jamfiles D:\dev\boost\tools\build\allyourbase.jam:1580: in SubInclude D:\dev\boost\tools\build\allyourbase.jam:1178: in subinclude Jamfile:3: in load-jamfiles D:\dev\boost\tools\build\bootstrap.jam:15: in boost-build D:\dev\boost\boost-build.jam:2: in module scope ...found 347 targets... ...updating 12 targets... File libs\regex\build\bin-stage\libboost_regex_debug.lib The system cannot find the file specified. copy libs\regex\build\bin\libboost_regex.lib\mvcs\debug\libboost_regex.lib libs\regex\build\bin-stage\libboost_regex_debug.lib ...failed File libs\regex\build\bin-stage\libboost_regex_debug.lib... File libs\regex\build\bin-stage\libboost_regex.lib The system cannot find the file specified. <snip> </result> Should I just wait for the 1.28.0 pre-build Jam executables (and associated instructions) to be posted? "David Abrahams" <david.abrahams@ To: boost-users(a)yahoogroups.com rcn.com> cc: Sent by: news Subject: [Boost-Users] Re: build setup - what have I missed? <news(a)main.gmane .org> 05/08/2002 09:29 PM Please respond to Boost-Users <dick.bridges(a)tais.com> wrote in message news:OFC855DCA5.CAFBF8DF-ON88256BB3.007925A3@tais.net... > This worked once. Then the [yeah, it wasn't backed up] disk drive died. > Target system is Win2000, SP5 and MS Visual C++ 6.0, SP5. <snip> > I've clearly screwed something up but I can't figure out what. Help would > be appreciated. This might hold your answer: http://aspn.activestate.com/ASPN/Mail/Message/boost/1193795 -Dave P.S. Toon, did you post this one to Boost-user? Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

2 1

Error report!!
by Ulises Herrera 09 May '02

09 May '02

The file... boost/random/uniform_smallint.hpp need... #include <boost/static_assert.hpp> when boost is compiled with g++-3.0 and a program is linked with it. -- _______________________________________________ Sign-up for your own FREE Personalized E-mail at Mail.com http://www.mail.com/?sr=signup

2 1

building Boost using Jam
by jd.schmidt＠juno.com 09 May '02

09 May '02

Hi, I'm new to using Boost. I've been trying to build Boost using Jam on Windows 2000. My compiler is MSVC6 SP5. As the documentation (www.boost.org/tools/build/index.html) says, I went to my Boost root directory (C:\boost_1_27_0 for me) and used the command jam -sBOOST_ROOT=. -sTOOLS="msvc" and I get the message: 'jam' is not recognized as an internal or external command, operable program, or batch file OK, fine, jam.exe is in C:\boost_1_27_0\boost-build; that's just where I downloaded it to. I've tried to run Jam from the boost-build directory, but I get the message: Jamfile: No such file or directory ...found 8 targets... This doesn't seem very straightforward. What do I need to do here so that I can build Boost? ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/web/.

2 1

build setup - what have I missed?
by dick.bridges＠tais.com 09 May '02

09 May '02

This worked once. Then the [yeah, it wasn't backed up] disk drive died. Target system is Win2000, SP5 and MS Visual C++ 6.0, SP5. Downloaded boost-build.win.zip and extracted it to c:\bin\boost-build. Added c:\bin\boost-build to the path. Set environment variables: BOOST_BUILD=c:\bin\boost-build JAM_TOOLSET=VISUALC VISUALC="c:\Program Files\Microsoft Visual Studio\VC98\bin" Checked out from CVS to d:\dev cd'd to d:\dev\boost and executed: %BOOST_BUILD%\jam -sBOOST_ROOT=. -sTOOLS=msvc <result> warning: unknown rule boost-build don't know how to make all ...found 1 target... ...can't find 1 target... </result> I've clearly screwed something up but I can't figure out what. Help would be appreciated. TIA (from the eternal newbie)

2 1

Unable to compile Boost Graph (BGL) inVisual Studio 7 (.NET)
by dmarsh26us 08 May '02

08 May '02

Have just bought the book and downloaded the source it all looks cool.... BUT Can't build a thing! Managed to get hold of AllExamples.dsw eventually converted it to a new VC7 solution ok (few errors on some projects). But no builds, cannot build any of my own code with BGL either. HELP. This is the jist of it:- ------ Build started: Project: dfs_example, Configuration: Debug Win32 ------ Compiling... dfs-example.cpp ../boost_1_25_1\boost\type_traits\cv_traits.hpp(188) : fatal error C1001: INTERNAL COMPILER ERROR (compiler file 'msc1.cpp', line 2844) Please choose the Technical Support command on the Visual C++ Help menu, or open the Technical Support help file for more information Build log was saved at "file://c:\BGL\VC++ Projects\Debug\BuildLog.htm" dfs_example - 1 error(s), 0 warning(s) ---------------------- Done ---------------------- Build: 0 succeeded, 1 failed, 0 skipped The cv traits class seems to trigger the compiler to crash horribly. I don't even know what this class does yet. (only got to page 55 of the book!) Anyone know a workaround? Anyone tried VC7 with boost yet? Is there a microsoft patch yet? Can't go back to VC6 as am using other new libraries. Thanks David Marsh

2 2

Help me pay the piper?
by dick.bridges＠tais.com 08 May '02

08 May '02

Now that I've used all this swell stuph, it's time to pay the piper: turn it over to QC and get it into "The Build". Unfortunately the QC people would like some instructions that describe which version of boost-build I'm using; how to install it; which version of the libs I'm using; etc. <some background> It's been a couple of months since I started with the boost libs, and I don't remember all the gyrations I went through to get it working and I'm POSITIVE I did a LOT more than is required. I remember that, after downloading and extracting boost_1_27_0.tar.gz, I had to get the current version from CVS before I could get a clean compile. (I tried turning over copies of my disk drives to them but it turns out that is not considered acceptable documentation. %>[ ) I've been following the jamboost and Boost-Users mailing lists so I know there've been quite a few changes - especially to boost-build. After building a "clean" testbed machine, I started by downloading boost-build.win.zip and following the instructions in the readme.html. Well, that didn't work. I can do a hand job on the path but I'm not sure what environment variables are actually required. Current plan is to pull the library source directly from CVS. Problem is, I don't know what version to tell QC I'm using and, unless all the folks at boost.org would agree not to add anything to CVS for a while, I SURE can't tell them how to re-create what I did. ;) </some background> I can always take what I've got; check it in and call it a day but that's not the path to getting boost integrated into the development environment around here. (Hey, I'm trying to be an evangelist here.) Anyone by any chance working on some updated instructions and/or docs that maybe aren't ready for prime time but would be willing to share? TIA PS: Current target systems are Win2000, SP2 and Visual C++ 6.0, SP5 and vanilla Red Had Linux 7.2.

2 1

voronoi diagram and BGL
by Louis Lavery 08 May '02

08 May '02

Hi, Is it possible to order the edges of a vertex of a boost graph? >From what I can glean from the BGL documentation, I guess the answer will be "No, but may be some time in the future". I so, how soon in the future? Thanks, Louis.

5 5

Solaris jam build
by cs_jritchie 08 May '02

08 May '02

I am receiving the following on a Solaris system when using: jam -sBOOST_ROOT=. -sTOOLS=gcc status/Jamfile:53: in failed-test-file warning: unknown rule FAIL_EXPECTED status/Jamfile:100: in fail-to-build ./tools/build/boost-base.jam:1407: in subvariant-target ./tools/build/boost-base.jam:1448: in main-target ./tools/build/boost-base.jam:1065: in declare-local-target status/Jamfile:35: in boost-test status/Jamfile:119: in compile-fail status/Jamfile:368: in SubInclude ./tools/build/allyourbase.jam:1141: in subinclude Jamfile:5: in module scope {...above repeated many times...} Unable to load Boost.Build, it seems that the build system files were located, but the build system is not defined. Attempted to use, as the bootstrap, this file: ./tools/build/boost-build.jam. This means that even though that file was loaded it either failed to directly load the build system files, or it failed to specify where to find and load the files by calling the 'build-system [path] ;' rule. Please consult the documentation at 'http://www.boost.org'. What am I doing wrong? Any help is appreciated.

2 4

Re: Problems building Python lib
by pendrildurham 08 May '02

08 May '02

Sorry -- Newbie here -- I don't know exactly what the 'latest CVS state' is or how to get it. I have been trying to build boost-python on Windows95 with MSVC++6. I have boost 1.27 and activestate python 2.2.1 build 222. I can get it to compile but the link fails. Here is the linker message for the boost-example1: Linking... Creating library Debug/hello.lib and object Debug/hello.exp example1.obj : error LNK2001: unresolved external symbol "bool __cdecl boost::python::handle_exception_impl(class boost::function0<void,struct boost::empty_function_policy,struct boost::empty_function_mixin,int>)" (?handle_exception_impl@python@boos t@@YA_NV?$function0@XUempty_function_policy@boost@@Uempty_function_mix in@2@H@2@@Z) bpl_static.lib(types.obj) : error LNK2001: unresolved external symbol "bool __cdecl boost::python::handle_exception_impl(class boost::function0<void,struct boost::empty_function_policy,struct boost::empty_function_mixin,int>)" (?handle_exception_imp l@python@boost@@YA_NV?$function0@XUempty_function_policy@boost@@Uempty _function_mixin@2@H@2@@Z) bpl_static.lib(extension_class.obj) : error LNK2001: unresolved external symbol "bool __cdecl boost::python::handle_exception_impl(class boost::function0<void,struct boost::empty_function_policy,struct boost::empty_function_mixin,int>)" (?handle_exc eption_impl@python@boost@@YA_NV?$function0@XUempty_function_policy@boo st@@Uempty_function_mixin@2@H@2@@Z) bpl_static.lib(extension_class.obj) : error LNK2001: unresolved external symbol "struct _object * __cdecl boost::python::expect_non_null(struct _object *)" (?expect_non_null@python@boost@@YAPAU_object@@PAU3@@Z) bpl_static.lib(functions.obj) : error LNK2001: unresolved external symbol "struct _object * __cdecl boost::python::expect_non_null(struct _object *)" (?expect_non_null@python@boost@@YAPAU_object@@PAU3@@Z) bpl_static.lib(objects.obj) : error LNK2001: unresolved external symbol "struct _object * __cdecl boost::python::expect_non_null(struct _object *)" (?expect_non_null@python@boost@@YAPAU_object@@PAU3@@Z) example1.obj : error LNK2001: unresolved external symbol "struct _object * __cdecl boost::python::expect_non_null(struct _object *)" (?expect_non_null@python@boost@@YAPAU_object@@PAU3@@Z) bpl_static.lib(module_builder.obj) : error LNK2001: unresolved external symbol "struct _object * __cdecl boost::python::expect_non_null(struct _object *)" (?expect_non_null@python@boost@@YAPAU_object@@PAU3@@Z) bpl_static.lib(init_function.obj) : error LNK2001: unresolved external symbol "struct _object * __cdecl boost::python::expect_non_null(struct _object *)" (?expect_non_null@python@boost@@YAPAU_object@@PAU3@@Z) bpl_static.lib(classes.obj) : error LNK2001: unresolved external symbol "struct _object * __cdecl boost::python::expect_non_null(struct _object *)" (?expect_non_null@python@boost@@YAPAU_object@@PAU3@@Z) Debug/hello.dll : fatal error LNK1120: 2 unresolved externals Error executing link.exe. hello.dll - 11 error(s), 0 warning(s) Perhaps there is something simple I can do to fix this? Perhaps there is something I need to include in the project to get the link to work? Can anyone help? Thanks --- In Boost-Users@y..., Albrecht Fritzsche <albrecht.fritzsche@t...> wrote: > David Abrahams wrote: > > >1. Get the latest CVS state. Release 1.27 is broken in several ways. > > > Ooops, ok - I will try the CVS version. > > >The library works with Python 2.2.1 > > > Thanks - that's the info I was hoping for :-) > > Ali

2 1

creating a shared_ptr<T> from a weak_ptr<T>
by Toon Knapen 08 May '02

08 May '02

When creating a shared_ptr<T> from a weak_ptr<T>, I want the shared_ptr<T> to use the same count as the shared_ptr the weak_ptr was constructed from. I could create a new shared_ptr, based on the pointer I can get() from the weak_ptr. But in this case, this shared_ptr will keep its own count. Let me fill you in on my use-case. An object creates some big data-structure on request of its clients, taking into account some options specified by the client while making the request. Now I'd like the server-object to keep a weak_ptr to these big data-structure to provide quickly the same result once another client performs an identical request. The server should however not keep a shared_ptr because otherwise all datastructure will stay in memory. And therefor I need to create a shared_ptr from a weak_ptr. thanks, toon

6 7

Re: [Boost-Users] AllExamples.dsw from BGL Errata Web-site
by Lie-Quan Lee 07 May '02

07 May '02

Hi Jon, Thanks to remind me that attachment doesn't work for yahoogroups. I put the file at http://groups.yahoo.com/group/boost/files/BGLVCprojects.tgz Just in case, it is also available at: http://www.osl.iu.edu/~llee/BGLVCprojects.tgz Jeremy Siek will update the file on BGL book errata page. On Tue, 2002-05-07 at 11:43, Jon Kalb wrote: > >Hi Richard, > > > >It looks like the BGLVCprojects.tgz online is corrupted somehow. I > >attached the right file (about 466.1K) in this message. Please extracts > >the contents of the tarball using winzip 8.0 or up. The tarball includes > >the missing workspace file and project files. > > > >Thanks for reporting that problem! > >-- > >Lie-Quan Lee (AKA: Rich Lee) > >Research Associate http://www.osl.iu.edu/~llee > >Computer Science Department llee(a)cs.indiana.edu > >Indiana University at Bloomington 812-855-3608(Office) > > > >[Non-text portions of this message have been removed] > > Rich, > > As you can see from the line inserted by Yahoo! Groups in your > message, Boost-Users is configured to not allow attachments. If you > wouldn't mind uploading the attachment to the group's shared file > area you can send a link to it. Or if you want to send the file to > me, I'll take care of it. > > Thanks. > > -- > Jon Kalb > Kalb(a)LibertySoft.com -- Lie-Quan Lee (AKA: Rich Lee) Research Associate http://www.osl.iu.edu/~llee Computer Science Department llee(a)cs.indiana.edu Indiana University at Bloomington 812-855-3608(Office)

1 0

AllExamples.dsw from BGL Errata Web-site
by loopylozzysdad 07 May '02

07 May '02

Hi, I am still having no luck with this file. In the Boost Graph Library book (Great book!), Errata web page (http://siek.info/bgl.html) it says... "On the accompanying CD, the file \BGL\VC++ Projects\AllExamples.dsw is missing. You can download the missing file from here BGLVCprojects.tgz." When I download it I get a 454K file. When I open it with WinZip winzip tells me there is a single file BGLVCprojects.tgz in it. when it opens that single file it only finds ONE file in that accum_compile_times.dsw size 4639 bytes. this does not make sense fo r a file that started at 454K but I don't seem able to get any more out of it. I am using WinZip 6.2. Another machine with WinZIP 8.0 reports 'Invalid compressed header after 1 entry'. Is anyone else getting this result. If not could you email me a file that works for you? All the best and thanks - Richard Howells

2 1

Association Library?
by rzako23 07 May '02

07 May '02

Are there any generic components in Boost (or elsewhere) for *directly* representing associations between classes? Generalization, composition, aggregation and association are major ideas in the object model. Generalization can be implemented fairly directly in C++ using inheritance. Composition and aggregation can be represented directly in C++ using data members (when the number of parts in each whole is small and fixed), or using STL containers (when the number of parts in each whole is large or variable). But Standard C++ (including the STL) provides no *direct* support for representing associations, i.e., collections of links between objects in two or more classes. (David Papurt makes this point in "Inside the Object Model: The Sensible Use of C++.") For example, the STL does not offer a way to *directly* represent the 1-to-many "Supervises" association from the Manager class to the Employee class. One would like to have links in both directions: forward links forthe employees a manager supervises and a back link to the manager each employee is supervised by. Of course, one could code this all "by hand" using a container of pointers to employees for each manager and a back pointer for each employee. But the implementation details really have little to do with managers and employees and would be pretty much the same for parents and children or teachers and students. Moreover, while not difficult, managing the forward and back links correctly (and in an exception-safe manner) is tedious. It would be nice to have templates that can be instantiated to implement specific associations. In brief, STL containers directly support composition and aggregation but not association. I am new to the Boost library, but was not able to find this capability in Boost. If an association library is available in Boost (or elsewhere), I would be happy to know so. If not, is an association library something that would be worth looking into? Thanks, Rob Zako

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Problems building Python lib
by Albrecht Fritzsche 03 May '02

03 May '02

Hi, since I've read in the documentation "Boost.Python is known to have been tested in the following configurations: Against Python 2.0 using the following compiler/library combinations: MSVC++6sp4 with the native library. ... Against Python 1.5.2 using the following compiler/library: MSVC++6sp4 MSVC++6sp4/STLport 4.0" and since I am using the MSVC++6sp4/STLport 4.0 combination I deinstalled Python 2.2 (for which the build failed) and installed Python 1.5.2. Running G:\Environment\boost_1_27_0>jam -sBOOST_ROOT=. -sTOOLS="msvc-stlport" I get the following errors: don't know how to make <python-library@>python21.lib ...patience... ...patience... ...found 2247 targets... ...using 2 temp targets... ...updating 132 targets... ...can't find 1 target... ...can't make 42 targets... msvc-C++-action libs\python\build\bin\libboost_python_static\msvc-stlport\debug\ runtime-link-dynamic\stlport-iostream-off\stlport-version-4.0\types.obj types.cpp .\boost/python/detail/wrap_python.hpp(24) : fatal error C1083: Include-Datei kann nicht geoeffnet werden: 'patchlevel.h': No such file or directory cl /Zm400 -nologo -GX -c -DBOOST_PYTHON_STATIC_LIB=1 -DBOOST_PYTHON_DYNAMI C_LIB -D__STL_NO_SGI_IOSTREAMS=1 -D__STL_DEBUG=1 -D__STL_DEBUG_UNINITIALIZED=1 /Zi /Od /Ob0 /GX /GR /MDd -I"libs\python\build" -I"." -I"c:/tools/python\inclu de" -I"c:/tools/python\PC" -I"\stlport" -I"D:\PROGRA~1\MICROS~1.0\VC98\include" -Fo"libs\python\build\bin\libboost_python_static\msvc-stlport\debug\runtime-li nk-dynamic\stlport-iostream-off\stlport-version-4.0\types.obj" -Tp"libs\python\ build\../src\types.cpp" ...failed msvc-C++-action libs\python\build\bin\libboost_python_static\msvc-stlp ort\debug\runtime-link-dynamic\stlport-iostream-off\stlport-version-4.0\types.ob j ... msvc-C++-action libs\python\build\bin\libboost_python_static\msvc-stlport\debug\ runtime-link-dynamic\stlport-iostream-off\stlport-version-4.0\classes.obj classes.cpp .\boost/python/detail/wrap_python.hpp(24) : fatal error C1083: Include-Datei kan n nicht geoeffnet werden: 'patchlevel.h': No such file or directory ............ [The obvious translation of this error message is: Cannot open include file 'patchlevel.h'.] What am I doing wrong? By the way, all of the other libs including tests are compiling with Jam without any problems at all. And, as a second quesion, why is there no MSVC++6sp4/STLport 4.0 support for the newer Python versions - by the way, there is already a Python v2.2. Thanks for any hints and help Ali *

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Re: [boost] boost organization and installation
by William E. Kempf 02 May '02

02 May '02

----- Original Message ----- From: "David Abrahams" <david.abrahams(a)rcn.com> > > ----- Original Message ----- > From: "William E. Kempf" <williamkempf(a)hotmail.com> > > OK, let me make this a bit more of an official request. If anyone is > > interested in volunteering for this effort send me a private e-mail. > Once I > > have, let's say at least 5, committed volunteers I'll start the effort > of > > creating and coordinating the needed community. > > I don't know whether you want to count me as a volunteer or not. I'm > willing to handle things from the Boost.Build end at some workable pace. > I don't think I can invest anything in other systems, except at the > integration boundary (e.g. if autotools builds Jam and calls it to build > boost). I'd hope that every developer with a current Boost library would be willing to volunteer to at least help with input here, and possibly to committing to some (minor) changes to procedures and/or code. I'm also glad you're volunteering to help from the Boost.Build end of things. But I won't count you as a volunteer for the actual effort here, since I know how busy you are. What I think we really need are volunteers from the user community, though I won't turn down any current Boost developers who think they have the time and experience to help out here. In any event, since I hope that we get volunteers from the user community, I'm CC:ing this to the Boost Users list. Anyone interested in helping out in this effort should e-mail me privately. Bill Kempf

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RE: [Boost-Users] MPL ?
by Aleksey Gurtovoy 01 May '02

01 May '02

Toon Knapen wrote: > Inside a templated class, I need to provide two different > implementations for > a function based on the compile-time decision > ::boost::is_convertible< value_type,double >::value. > How can I do this using MPL ? 1) A simple way: template< typename T > class my { public: typedef typename T::value_type value_type; void foo() { typedef boost::is_convertible< value_type,double > c; do_foo(mpl::bool_c<c::value>()); } private: void do_foo(mpl::true_c) { /*...*/ } void do_foo(mpl::false_c) { /*...*/ } }; Andrei has written an article that covers this technique - http://www.cuj.com/experts/1810/alexandr.htm. 2) A sophisticated one (becomes more relevant when you have several "foo"'s to handle): template< typename T, typename Derived > struct foo_impl { void foo() { Derived& self = static_cast<Derived&>(*this); // ... } }; template< typename Derived > struct foo_double_impl { void foo() { Derived& self = static_cast<Derived&>(*this); // ... } }; template< typename T > class my : public mpl::select_if< boost::is_convertible< typename T::value_type,double > , foo_impl<T, my> , foo_double_impl<T> >::type { // ... private: friend class foo_impl<T, my>; friend class foo_double_impl<T>; // ... }; HTH, Aleksey

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MPL ?
by Toon Knapen 01 May '02

01 May '02

Inside a templated class, I need to provide two different implementations for a function based on the compile-time decision ::boost::is_convertible< value_type,double >::value. How can I do this using MPL ? thanks, toon

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RE: [Boost-Users] shared_ptr and incomplete types
by bjorn.karlsson＠readsoft.com 01 May '02

01 May '02

> From: Jim Hyslop [mailto:jim.hyslop@leitch.com] > > I notice that the implementation available at boost.org does not allow > the single-argument ctor to be called on an incomplete type, e.g.: [snip] > The documentation on the single-argument ctor, though, does not state > that T must be a complete type. Is the implementation > stricter than the > documentation, or is the documentation incomplete? I believe that the implementation is correct, and that belief is confirmed by the latest documentation in the CVS - T must indeed be a complete type. Another change is the addition of a default constructor, which does not require T to be complete. > I'm writing an article on the smart pointers for the CUJ, and I'd like Cool! ;-) > to know if I can correctly state "The default behavior for > shared_ptr is > to require complete types. You can, however, manage an incomplete type > if you provide a function or function object, which will be > called when > the owned object is destroyed." Since shared_ptr requires a complete type only for a few operations, such as the constructor that you mentioned, and reset(T * p), I'd rephrase to something more explicit, like: "The instantiation of a shared_ptr typically requires a complete type. [etc]". Bjorn Karlsson [Non-text portions of this message have been removed]

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shared_ptr and incomplete types
by Jim Hyslop 01 May '02

01 May '02

The documentation at http://www.boost.org/libs/smart_ptr/shared_ptr.htm states that "T may be void, but in that case, either an explicit delete function must be passed in, or the pointed-to object must have a trivial destructor." I notice that the implementation available at boost.org does not allow the single-argument ctor to be called on an incomplete type, e.g.: class simple; simple * createSimple(); shared_ptr<simple> simpleFactory() { return shared_ptr<simple>(createSimple()); } The documentation on the single-argument ctor, though, does not state that T must be a complete type. Is the implementation stricter than the documentation, or is the documentation incomplete? I'm writing an article on the smart pointers for the CUJ, and I'd like to know if I can correctly state "The default behavior for shared_ptr is to require complete types. You can, however, manage an incomplete type if you provide a function or function object, which will be called when the owned object is destroyed." -- Jim

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Graph Library - AllExamples.dsw, anyone got it?
by loopylozzysdad 30 Apr '02

30 Apr '02

Hi All, Just read the excellent Boost Graph Library book. The AllExamples.dsw file is not on the accompanying CD. In the Errata web page (http://siek.info/bgl.html) it says... "On the accompanying CD, the file \BGL\VC++ Projects\AllExamples.dsw is missing. You can download the missing file from here BGLVCprojects.tgz." The file there is a .dsw file but it is NOT the missing one. Has anyone got the real thing? All the best and thanks - Richard Howells

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Re: Boost.Thread (VC specific)
by Holger Thiele 30 Apr '02

30 Apr '02

>-----Ursprungliche Nachricht----- >Von: bill_kempf [mailto:williamkempf@hotmail.com] >Gesendet: Dienstag, 30. April 2002 17:54 >An: Boost-Users(a)yahoogroups.com >Betreff: [Boost-Users] Re: Boost.Thread (VC specific) > > >I don't agree. If it's a good idea, then I'd expect MS to do this by >default for IDE generated builds. Such as default warning level 3? >There's some overhead involved in >generating this, there's compile time overhead (which is important to >some) Do you have figures on that? In my experience, this overhead seems to be a small price to pay for the ability to track bugs (inside your debugger!) on released code. >and there's the fact that many users will be confused by the >presence of debug information and why "stepping" through the code >behaves so strangely and unpredictably. As always, if someone doesn't know what he's doing, there's little help besides getting educated. But, seriously, I think that most users that even get into debugging release builds would surely appreciate library code that supports this. Just my 2 cents. Cheers, and thanks for one of my favorite libraries Holger Thiele D.A.V.I.D. GmbH www.david-gmbh.de

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RE: [Boost-Users] operator == in shared_ptr
by bjorn.karlsson＠readsoft.com 30 Apr '02

30 Apr '02

> From: sashan [mailto:sashang@ihug.co.nz] [snip] > Is there a better way that doesn't involve 1) having to write > a wrapper class around a basic type (or any type) and 2) > doesn't involve changing the shared_ptr::operator==. > As others have pointed out, the solution is to use a function object and std::find_if. In this case, the comparison doesn't even need a separate predicate - the (exceptionally cool) Boost.Bind library can be used instead: vector<shared_ptr<int> >::iterator it=std::find_if(vec.begin(),vec.end(),bind(std::equal_to<int>(),bind(&shared _ptr<int>::operator*, _1),42)); Bjorn Karlsson [Non-text portions of this message have been removed]

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operator == in shared_ptr
by sashan 30 Apr '02

30 Apr '02

Hi Because the operator== function compares pointers and not what they're pointing to this is what I've had to do to get it to find an integer. Basically I had to wrap the basic int type within another class called Int, as show below. class Int { private: shared_ptr<int> p; public: Int(int i) {p.reset(new int); *p = i;} bool operator==(const Int& r) {return *p.get() == *r.p.get();} ~Int() {}; }; void main() { vector < Int > vec; vec.push_back(Int(1)); vec.push_back(Int(2)); vec.push_back(Int(3)); Int p(4); if (find(vec.begin(), vec.end(), p) == vec.end()) { cout << "Couldn't find it"; } } Is there a better way that doesn't involve 1) having to write a wrapper class around a basic type (or any type) and 2) doesn't involve changing the shared_ptr::operator==. [Non-text portions of this message have been removed]

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boost::function::set()
by Douglas Gregor 29 Apr '02

29 Apr '02

Does anyone use the boost::function::set() methods? I'd like to remove them for Boost.Function v2 to cut down on the size of the interface. If you are using set() and would like to keep using it, please tell me. Doug

1 0

RE: [Boost-Users] iterating over a tuple
by Aleksey Gurtovoy 29 Apr '02

29 Apr '02

Toon Knapen wrote: > On Friday 26 April 2002 13:37, Aleksey Gurtovoy wrote: > > Toon Knapen wrote: > > > I have a list of heterogeneous objects, e.g. > [snip sample code] > > > > And now I want to have a function that can accumulate the > > > value sof all the objects in the tuple, e.g. (pseudocode since > > > my problem is exacly that I can't figure out how to code this) > > > > > > template < typename TypleType > > > > int accumulate_values(const TupleType& t) > > > { > > > int acc = 0; > > > for(int i = 0 ; i < t.size() ; ++i ) acc += (get( > t )).value(); > > > } > > > > > > Can I do this using mpl (mpl looks great but I can't figure > > > out how to do this). > > > > It's not exactly a part of MPL (the library doesn't target > "run-time" stuff > > to that extent yet; I hope it will some day), but "tuple extension" > > components I wrote some time ago > > > (http://groups.yahoo.com/group/boost/files/tuple_ext/tuple_ext-08-nov-01.zip ) > allow one to do exactly these kinds of things: > [snip aleksey's solution] > > Thanks, I like tuple_ext a _lot_ ! I am glad you found it useful. > It would be great to have complete STL-like functionality like this. Yep. The only problem with this is that we are going to end up with 3 STL-like libraries within the same language :) (the original one ("run-time"), the MPL one (pure compile time), and something in between, - HSTL (Heterogeneous Sequences Template Library :)). All three with the same algorithms, just written in different notation :). Emily's heterogeneous lists (www.oonumerics.org/tmpw01/winch.pdf, http://groups.yahoo.com/group/boost/files/alist-feb14-02.zip) 'tuple_ext' components, and MPL's v.2 half-run-time 'for_each' are obviously hanging around that "in between" thing. > Plans on adding this tuple_ext to the CVS ? Some; I think it should be a full-fledged submission that would take the prior art and build a simple framework on it. It's not a large undertaking, though - most of the concepts and some code are already here :). Aleksey

1 0

BGL: "Supergraphs?"
by David A. Greene 29 Apr '02

29 Apr '02

Hi, I've been learning the BGL and porting some existing code over to it. First off, Kudos to Jeremy, Lie-Quan and all the BGL developers. This library is great! I find the filtered_graph potentially very useful for my application except for one case. In some (not rare) instances I need to be able to create a filtered_graph that spans two graphs. In other words, I have two separate graphs. Most of the time the information I need is entirely contained in one graph so a filtered_graph works perfectly. However, sometimes I need to create a filtered_graph from several separate graphs and link them together in a well-defined manner (i.e. I easily know where the edges should go). I need a "supergraph" that is the combination of the two filtered graphs. Right now the application handles this problem by creating a new graph from the existing graphs. But this takes time and memory. I'd like to get rid of this overhead if possible, especially since these are often short-lived graphs. The filtered_graph objects would not be induced subgraphs so a subgraph object wouldn't work (subgraph also doesn't support something that spans multiple graphs anyway). What I need is the opposite of subgraph -- a unified interface to multiple filtered_graphs. This seems very hard to do because each filtered_graph will have its own vertex and edge index mappings. An extra level of indirection would solve the problem but I'm not sure the overhead would be less than simply creating a new graph. Thoughts? Opinions? Thanks again for a great library! -Dave -- "Some little people have music in them, but Fats, he was all music, and you know how big he was." -- James P. Johnson

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Newbie: problems installing under RedHat 7.2
by Benjamin Han 28 Apr '02

28 Apr '02

I'm just trying to install Boost library under RedHat 7.2. I was following the build instructions found on the Boost website, but it seemed to fail for several targets. I'm wondering if it's because RH7.2 uses its version of gcc 2.96. Since my project work needs gcc 3.0+, my question is, what do I need to do in order to use gcc3/g++3 instead of gcc/g++? The build system seems exotic and I just want to get over with the installation asap and start to use the library. (does changing /usr/bin/gcc and /usr/bin/g++ links work?) Here is the build command I tried: jam -sBOOST_ROOT=. -sTOOLS="gcc" Errors (selected): ... libs/thread/build/../src/once.cpp: In function `void boost::call_once (void (*) (), once_flag &)': boost/thread/once.hpp:38: previous declaration of `void boost::call_once (void (*) (), once_flag &)' with C++ linkage libs/thread/build/../src/once.cpp:77: conflicts with new declaration ... MkDir1 libs/python/build/bin/libboost_python_static/gcc/debug/runtime-link-dynam ic/shared-linkable-true gcc-C++-action libs/python/build/bin/libboost_python_static/gcc/debug/runtime-li nk-dynamic/shared-linkable-true/types.o In file included from boost/python/errors.hpp:13, from boost/python/detail/call_object.hpp:8, from libs/python/build/../src/types.cpp:11: boost/python/detail/wrap_python.hpp:24:24: patchlevel.h: No such file or directo ry boost/python/detail/wrap_python.hpp:100:20: Python.h: No such file or directory ... (lots of Python-related errors) ... gcc-C++-action status/bin/is_function_test/gcc/debug/runtime-link-dynamic/is_fun ction_test.o boost/type_traits/function_traits.hpp: In instantiation of `boost::is_function': status/../libs/type_traits/tests/is_function_test.cpp:68: instantiated from he re boost/type_traits/function_traits.hpp:148: Internal error: Segmentation fault. Please submit a full bug report. See <URL:http://bugzilla.redhat.com/bugzilla/> for instructions. ... &boost::noncopyable::operator= (const boost::noncopyable &)' is private status/../libs/utility/noncopyable_test.cpp:35: within this context ...failed updating 43 targets... ...skipped 24 targets... ...updated 629 targets... The folllowing RPMs are installed on the machine: 1. gcc-2.96-110 2. gcc3-3.1-0.23.1 3. python-1.5.2-38 4. python2-2.2-16 5. glibc-2.2.5-32 6. boost-build-1.0-1 7. boost-jam-3.0-1 Other info: kernel 2.4.18 (manually built) Any comment would be greatly appreciated, Ben

3 3

RE: [Boost-Users] iterating over a tuple
by Aleksey Gurtovoy 28 Apr '02

28 Apr '02

Toon Knapen wrote: > I have a list of heterogeneous objects, e.g. > > struct Foo { > Foo(int v) : value_( v ) {} > int value() const { return value_ ; } > int value_; > }; > > struct Bar { > Bar(int v) : value_( v ) {} > int value() const { return value_ ; } > int value_; > }; > > int main() > { > Foo foo(3); > Bar bar(7); > typedef boost::tuple< Foo, Bar > MyTuple ; > MyTuple my_tuple( foo, bar ); > return 0; > } > > And now I want to have a function that can accumulate the > value sof all the objects in the tuple, e.g. (pseudocode since > my problem is exacly that I can't figure out how to code this) > > template < typename TypleType > > int accumulate_values(const TupleType& t) > { > int acc = 0; > for(int i = 0 ; i < t.size() ; ++i ) acc += (get( t )).value(); > } > > Can I do this using mpl (mpl looks great but I can't figure > out how to do this). It's not exactly a part of MPL (the library doesn't target "run-time" stuff to that extent yet; I hope it will some day), but "tuple extension" components I wrote some time ago (http://groups.yahoo.com/group/boost/files/tuple_ext/tuple_ext-08-nov-01.zip ) allow one to do exactly these kinds of things: // untested! :) template< typename Seq, typename T, typename BinaryOp > T accumulate(Seq const& s, T const& Init, BinaryOp op) { T result = Init; for_each( begin(s) , end(s) , boost::bind<T>(op, boost::ref(result), _1) ); return result; } With the above, you can do something like this: struct get_value { template< typename T > int operator()(T const& x) const { return x.value(); } }; int sum = accumulate( tuple , 0 , boost::bind(std::plus<int>() , _1 , boost::bind<int>(get_value(),_2) ) ); Hope it's not too complicated :). LL might allow to do better on this one. Aleksey

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