July 2006 - Boost - lists.preview.boost.org

Exception lib?
by Emil Dotchevski 09 Jul '06

09 Jul '06

Hello, After the promising initial interest in the Exception lib I wrote, I ported the source code to Boost, and posted a link to the documentation. But so far there has not been even a single reply to my post :| I am not quite sure how to inerpret this... Is it "go ahead, we'll discuss the details during the formal review process"? Or is it complete lack of interest for adding such a library to Boost? I'm even more puzzled because my initial post did get a bunch of responses, without even having posted source code or documentation! Anyway... Here is the link to the documentation again: http://www.revergestudios.com/exception/exception.htm If you click "download", you'll get the source code, as well as an example and a test suite, complete with Boost Build jamfiles. Thanks, Emil

11 39

Thanks Bjam!
by Andy Little 08 Jul '06

08 Jul '06

Whenever I invoke bjam I get this first: warning: Python location is not configured warning: the Boost.Python library won't be built Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (and if you don't know what ICU is then you probably don't need it). Thanks Bjam. You know what? I really don't care! ;-) regards Andy Little

13 26

building boost on i386 OSX
by Oliver Gräser 08 Jul '06

08 Jul '06

Hello, I'm trying to build boost on my Macbook, which runs OSX 10.4.7 on intel core duo with 2GB of ram. I downloaded boost_1_33_1.tar.gz, untared the file, ran configure, sudo make, sudo make install. Apparently, this installs some 1k + libraries, but not all - 6 libraries are not installed. If I re-run configure and make, it tries to update only these libs, but failes again. I attach the full output, however, the failure seems to originate from some undefined symbols (what ever a symbol is...) ld: Undefined symbols: __Z20init_unit_test_suiteiPPc /usr/bin/libtool: internal link edit command failed All these symbols are called whatsoeverPPc, so I think it might be caused by my intel CPU. Is there any workaround for this? I found the same problem posted on another mailing list, but with no replies so far. Can anyone help? Thanks a lot Oliver ---------------------terminal output----------------------------------------- ./tools/build/jam_src/bin.macosxx86/bjam -sPYTHON_ROOT=/System/ Library/Frameworks/Python.framework/Versions/2.3 -sPYTHON_VERSION=2.3 --prefix=/usr/local --exec-prefix=/usr/local --libdir=/usr/local/lib --includedir=/usr/local/include -sTOOLS=darwin install Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (and if you don't know what ICU is then you probably don't need it). ...found 13486 targets... ...updating 12 targets... darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/debug/shared-linkable-true/ libboost_prg_exec_monitor-d-1_33_1.dylib ld: Undefined symbols: __Z8cpp_mainiPPc /usr/bin/libtool: internal link edit command failed DYLD_LIBRARY_PATH=bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/debug/shared-linkable-true export DYLD_LIBRARY_PATH ld -dynamic -m -r -d -o "bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/debug/shared-linkable-true/ libboost_prg_exec_monitor-d-1_33_1.lo" "bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/debug/shared-linkable-true/ execution_monitor.o" "bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/debug/shared-linkable-true/ cpp_main.o" \ && \ c++ -g -o "bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/debug/shared-linkable-true/ libboost_prg_exec_monitor-d-1_33_1.dylib" "bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/debug/shared-linkable-true/ libboost_prg_exec_monitor-d-1_33_1.lo" \ \ -dynamiclib -install_name "libboost_prg_exec_monitor- d-1_33_1.dylib" \ && \ rm -f "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/ darwin/debug/shared-linkable-true/libboost_prg_exec_monitor-d-1_33_1.lo" ...failed darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/debug/shared-linkable-true/ libboost_prg_exec_monitor-d-1_33_1.dylib... ...skipped <@boost!lib>libboost_prg_exec_monitor-d-1_33_1.dylib for lack of <@boost!libs!test!build/libboost_prg_exec_monitor.dylib/ darwin/debug/shared-linkable-true>libboost_prg_exec_monitor- d-1_33_1.dylib... darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/release/shared-linkable-true/ libboost_prg_exec_monitor-1_33_1.dylib ld: Undefined symbols: __Z8cpp_mainiPPc /usr/bin/libtool: internal link edit command failed DYLD_LIBRARY_PATH=bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/release/shared-linkable-true export DYLD_LIBRARY_PATH ld -dynamic -m -r -d -o "bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/release/shared-linkable-true/ libboost_prg_exec_monitor-1_33_1.lo" "bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/release/shared-linkable-true/ execution_monitor.o" "bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/release/shared-linkable-true/ cpp_main.o" \ && \ c++ -Wl,-x -o "bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/release/shared-linkable-true/ libboost_prg_exec_monitor-1_33_1.dylib" "bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/release/shared-linkable-true/ libboost_prg_exec_monitor-1_33_1.lo" \ \ -dynamiclib -install_name "libboost_prg_exec_monitor-1_33_1.dylib" \ && \ rm -f "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/ darwin/release/shared-linkable-true/libboost_prg_exec_monitor-1_33_1.lo" ...failed darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/release/shared-linkable-true/ libboost_prg_exec_monitor-1_33_1.dylib... ...skipped <@boost!lib>libboost_prg_exec_monitor-1_33_1.dylib for lack of <@boost!libs!test!build/libboost_prg_exec_monitor.dylib/ darwin/release/shared-linkable- true>libboost_prg_exec_monitor-1_33_1.dylib... darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ libboost_test_exec_monitor-d-1_33_1.dylib ld: Undefined symbols: __Z9test_mainiPPc /usr/bin/libtool: internal link edit command failed DYLD_LIBRARY_PATH=bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true export DYLD_LIBRARY_PATH ld -dynamic -m -r -d -o "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ libboost_test_exec_monitor-d-1_33_1.lo" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ compiler_log_formatter.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ execution_monitor.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ framework.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ plain_report_formatter.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ progress_monitor.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ results_collector.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ results_reporter.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ test_main.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ test_tools.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ unit_test_log.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ unit_test_main.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ unit_test_monitor.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ unit_test_parameters.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ unit_test_suite.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ xml_log_formatter.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ xml_report_formatter.o" \ && \ c++ -g -o "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ libboost_test_exec_monitor-d-1_33_1.dylib" "bin/boost/libs/test/ build/libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable- true/libboost_test_exec_monitor-d-1_33_1.lo" \ \ -dynamiclib -install_name "libboost_test_exec_monitor- d-1_33_1.dylib" \ && \ rm -f "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ libboost_test_exec_monitor-d-1_33_1.lo" ...failed darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/debug/shared-linkable-true/ libboost_test_exec_monitor-d-1_33_1.dylib... ...skipped <@boost!lib>libboost_test_exec_monitor-d-1_33_1.dylib for lack of <@boost!libs!test!build/libboost_test_exec_monitor.dylib/ darwin/debug/shared-linkable-true>libboost_test_exec_monitor- d-1_33_1.dylib... darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ libboost_test_exec_monitor-1_33_1.dylib ld: Undefined symbols: __Z9test_mainiPPc /usr/bin/libtool: internal link edit command failed DYLD_LIBRARY_PATH=bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true export DYLD_LIBRARY_PATH ld -dynamic -m -r -d -o "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ libboost_test_exec_monitor-1_33_1.lo" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ compiler_log_formatter.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ execution_monitor.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ framework.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ plain_report_formatter.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ progress_monitor.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ results_collector.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ results_reporter.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ test_main.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ test_tools.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ unit_test_log.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ unit_test_main.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ unit_test_monitor.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ unit_test_parameters.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ unit_test_suite.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ xml_log_formatter.o" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ xml_report_formatter.o" \ && \ c++ -Wl,-x -o "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ libboost_test_exec_monitor-1_33_1.dylib" "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ libboost_test_exec_monitor-1_33_1.lo" \ \ -dynamiclib -install_name "libboost_test_exec_monitor-1_33_1.dylib" \ && \ rm -f "bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ libboost_test_exec_monitor-1_33_1.lo" ...failed darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_test_exec_monitor.dylib/darwin/release/shared-linkable-true/ libboost_test_exec_monitor-1_33_1.dylib... ...skipped <@boost!lib>libboost_test_exec_monitor-1_33_1.dylib for lack of <@boost!libs!test!build/libboost_test_exec_monitor.dylib/ darwin/release/shared-linkable- true>libboost_test_exec_monitor-1_33_1.dylib... darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ libboost_unit_test_framework-d-1_33_1.dylib ld: Undefined symbols: __Z20init_unit_test_suiteiPPc /usr/bin/libtool: internal link edit command failed DYLD_LIBRARY_PATH=bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true export DYLD_LIBRARY_PATH ld -dynamic -m -r -d -o "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ libboost_unit_test_framework-d-1_33_1.lo" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ compiler_log_formatter.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ execution_monitor.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ framework.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ plain_report_formatter.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ progress_monitor.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ results_collector.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ results_reporter.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ test_tools.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ unit_test_log.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ unit_test_main.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ unit_test_monitor.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ unit_test_parameters.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ unit_test_suite.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ xml_log_formatter.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ xml_report_formatter.o" \ && \ c++ -g -o "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ libboost_unit_test_framework-d-1_33_1.dylib" "bin/boost/libs/test/ build/libboost_unit_test_framework.dylib/darwin/debug/shared-linkable- true/libboost_unit_test_framework-d-1_33_1.lo" \ \ -dynamiclib -install_name "libboost_unit_test_framework- d-1_33_1.dylib" \ && \ rm -f "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ libboost_unit_test_framework-d-1_33_1.lo" ...failed darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable-true/ libboost_unit_test_framework-d-1_33_1.dylib... ...skipped <@boost!lib>libboost_unit_test_framework-d-1_33_1.dylib for lack of <@boost!libs!test!build/ libboost_unit_test_framework.dylib/darwin/debug/shared-linkable- true>libboost_unit_test_framework-d-1_33_1.dylib... darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/libboost_unit_test_framework-1_33_1.dylib ld: Undefined symbols: __Z20init_unit_test_suiteiPPc /usr/bin/libtool: internal link edit command failed DYLD_LIBRARY_PATH=bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable-true export DYLD_LIBRARY_PATH ld -dynamic -m -r -d -o "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/libboost_unit_test_framework-1_33_1.lo" "bin/boost/libs/test/ build/libboost_unit_test_framework.dylib/darwin/release/shared- linkable-true/compiler_log_formatter.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/execution_monitor.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/framework.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/plain_report_formatter.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/progress_monitor.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/results_collector.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/results_reporter.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/test_tools.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/unit_test_log.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/unit_test_main.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/unit_test_monitor.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/unit_test_parameters.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/unit_test_suite.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/xml_log_formatter.o" "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/xml_report_formatter.o" \ && \ c++ -Wl,-x -o "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/libboost_unit_test_framework-1_33_1.dylib" "bin/boost/libs/test/ build/libboost_unit_test_framework.dylib/darwin/release/shared- linkable-true/libboost_unit_test_framework-1_33_1.lo" \ \ -dynamiclib -install_name "libboost_unit_test_framework-1_33_1.dylib" \ && \ rm -f "bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/libboost_unit_test_framework-1_33_1.lo" ...failed darwin-Link-DyLib-action bin/boost/libs/test/build/ libboost_unit_test_framework.dylib/darwin/release/shared-linkable- true/libboost_unit_test_framework-1_33_1.dylib... ...skipped <@boost!lib>libboost_unit_test_framework-1_33_1.dylib for lack of <@boost!libs!test!build/libboost_unit_test_framework.dylib/ darwin/release/shared-linkable- true>libboost_unit_test_framework-1_33_1.dylib... ...failed updating 6 targets... ...skipped 6 targets... Not all Boost libraries built properly. Oliver Gräser Physics Department, University of Konstanz Soft Condensed Matter Theory Group Universitätsstrasse 10 / M671 D-78457 Konstanz phone: +49 7531 882550 mailto:oliver.graeser@uni-konstanz.de

2 4

Convert function pointer type to function type
by Peter Soetens 08 Jul '06

08 Jul '06

Hi, I'm desperately seeking for doing this conversion using the boost libraries. User code often provides a function pointer, while library code often works with function types. For example (function_conversion does the 'magic' here): int foo(int); template<class T, class R = typename function_conversion<T>::type > boost::function<R> function_wrapper(T t) { return boost::function<R>(t); } Such that the user can write: function_wrapper( &foo )(1); Thus no longer needs to specify the int(int) function type to boost::function. Is it possible to construct such a 'function_conversion' type ? Any answer is greatly appreciated, Peter -- Peter Soetens -- FMTC -- <http://www.fmtc.be>

4 6

Shmem shared_ptr issue with gcc 3.3.x
by Ryan, Paul L. 07 Jul '06

07 Jul '06

Ion and boost list, I've been working with the shmem version of shared_ptrs and have come accross and interesting issue. When using the library on a 3.4.x gcc compiler I have on issues however when compiling with a gcc 3.3.x compiler the #error Unrecongnized threading platform gets thrown from /boost/shmem/smart_ptr/sp_counted_base.hpp. It also apears that this compilation is successful when using standard boost shared_ptrs instead of the ones included with boost. Any assitance with this issue would be greatly appreciated. Paul Ryan SAIC - Tactical Systems

2 1

Comments on Value Semantics vs. OOP et. al.
by Sean Parent 07 Jul '06

07 Jul '06

A couple of passing comments (okay - it turned into a lecture, I've been doing to much public speaking lately...) Generic programming is the processes of defining algorithms in terms of semantic requirements on types and operations with the goal of achieving maximum efficiency _and_ the highest level of abstraction. I have a presentation with the following table relating generic programming to abstract algebra. Generic Programming Mathematics ____________________________________________________ Semantic Requirement Axiom Concept Algebraic Structure Model (types and operations) Model Algorithms Theorems Regular Function Function Refined Concept - a Concept defined by adding requirements to an existing concept. monoid: semigroup with an identity element BidirectionalIterator: ForwardIterator with constant complexity decrement Refined Algorithm - an algorithm performing the same function as another but with lower complexity or space requirements given a refined concept. One of my favorite quotes from Alex is "Software is defined on algebraic structures." We don't make the semantic requirements up - we discover them in the algorithms we write on the machine model we're given. I like to bash on OOPs as much as the next Generic guy - but the fact is that the same Concepts _must_ be reflected in OOP or the algorithms _can't_ work. Generic programming is as much about understanding how software works as how to write software. The most common point of contention I hear is that the current practice of Generic programming ignores "move" as a semantic requirement (we speak in terms of assignment which is often too strong) where as OOP (as currently practiced with heavy use of heap allocated objects) gets "move" for free (as a side effect of an implementation detail to get polymorphism) - hence OOP programmers don't see the strong need for copy and assignment. Nearly all of the STL algorithms could be recast in terms of move and would be more efficient. We can do a pretty good job of an efficient move with swap() - but _really_ swap should be defined in terms of move instead of being a primitive. An interesting point is that move() is much more necessary with the current style of OOP because of the need to use factory functions instead of constructors for object creation - so us Generic guys would rather just create the object in place. The requirement of polymorphism comes from the desire to perform algorithms on heterogeneous collections (different types modeling the same Concept(s)). Since a model is a collection of types and operations, imposing the requirement of polymorphism through inheritance on closed classes is unnecessarily intrusive and limiting. Inheritance becomes a significant barrier to code reuse. The need for heap allocations stems from the fact that heterogeneous types will be of different sizes - dealing with these pointers (and the significant ensuing issues) is purely a side effect of that implementation detail. Non-mutable values have the advantage that pointers to a non-mutable value have the same semantics (practically) as just a const value (hence FP languages have value semantics even though they're typically implemented with references). The difference with pointers only appear with multiple write access; which in practice is relatively rare, even by accident in systems with rampant use of ref counted pointers. Trying to eliminate all mutating operations is foolhardy. That's not just my opinion, John Backus told me he always knew that mutating operations were necessary, he just didn't know how to deal with them systematically - he is impressed by Alex's work in this area. The difference between having operator=() mean "move" and operator=() mean "assign" is purely one of syntax - not semantics. It is desirable to settle on a single syntax for the Regular operations (copy, assign, move, equality comparison) and that implies the use of copy_ctor, operator=(), swap (until we have a good move), and operator==() for consistency with built in types (including the pointers used to refer to the OOPs objects). It is more important to define algorithms in terms of concepts then to debate the syntactic issues. Algorithms are our theorems. Seek to _understand_ what is going on with OOPs instead of simply slamming it. The fact is, programming with runtime polymorphism using the current Generic programming style is cumbersome and often requires significant language abuse to achieve the same results that can be had with simple inheritance. Of course, thanks to Boost much of that abuse comes pre-packaged and ready to use. -- Sean Parent Sr. Engineering Manager Adobe Software Technology Lab sparent(a)adobe.com

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tr1/test_bind_tricky patch
by Peter Dimov 07 Jul '06

07 Jul '06

I just applied the following patch to test_bind_tricky.cpp; since boost::bind's placeholders are sometimes inline functions, they can't be passed to const T&. It might be better to have something that at least has a chance to pass. Index: libs/tr1/test/test_bind_tricky.cpp ===================================================== RCS file: /cvsroot/boost/boost/libs/tr1/test/test_bind_tricky.cpp,v retrieving revision 1.2 retrieving revision 1.3 diff -u -r1.2 -r1.3 --- libs/tr1/test/test_bind_tricky.cpp 12 Nov 2005 17:34:36 -0000 1.2 +++ libs/tr1/test/test_bind_tricky.cpp 7 Jul 2006 19:25:00 -0000 1.3 @@ -13,12 +13,12 @@ #include "verify_return.hpp" template <class T> -void check_placeholder(const T&) +void check_placeholder( T ) { T t; T t2(t); (void)t2; - BOOST_STATIC_ASSERT(::std::tr1::is_placeholder<T>::value); + BOOST_STATIC_ASSERT( ::std::tr1::is_placeholder<T>::value > 0 ); }

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Boost regression notification (2006-07-07 [RC_1_34_0])
by Douglas Gregor 07 Jul '06

07 Jul '06

Boost Regression test failures Report time: 2006-07-07T11:05:25Z This report lists all regression test failures on release platforms. Detailed report: http://engineering.meta-comm.com/boost-regression/CVS-RC_1_34_0/developer/i… 459 failures in 33 libraries algorithm/string (1) concept_check (1) conversion (1) filesystem (4) graph (6) integer (3) io (1) iostreams (60) iterator (1) lambda (2) math (5) mpl (20) numeric/conversion (4) numeric/interval (2) numeric/ublas (7) optional (2) parameter (33) pool (3) program_options (19) python (92) random (1) rational (5) serialization (46) signals (16) smart_ptr (1) spirit (12) test (8) tr1 (79) type_traits (11) typeof (9) utility (2) utility/enable_if (1) wave (1) |algorithm/string| replace: vc-7_1-stlport |concept_check| class_concept_check_test: vc-7_1-stlport |conversion| lexical_cast_test: sun-5.8 |filesystem| fstream_test: sun-5.8 mbcopy: sun-5.8 operations_test_dll: vc-7_1-stlport wide_test: sun-5.8 |graph| adjacency_matrix_test: vc-7_0 bidir_remove_edge: vc-7_0 csr_graph_test: sun-5.8 graphviz_test: msvc-8.0 msvc-8.0 vc-7_1-stlport |integer| integer_traits_test: qcc-3.3.5_gpp qcc-3.3.5_gpp qcc-3.3.5_gpp |io| ios_state_unit_test: gcc-4.1.0_linux_x86_64 |iostreams| array_test: vc-6_5 auto_close_test: sun-5.8 vc-6_5 buffer_size_test: sun-5.8 vc-6_5 bzip2_test: msvc-7.1 msvc-8.0 sun-5.8 code_converter_test: sun-5.8 vc-6_5 component_access_test: sun-5.8 vc-6_5 compose_test: borland-5_6_4 sun-5.8 vc-6_5 copy_test: vc-6_5 counter_test: sun-5.8 vc-6_5 direct_adapter_test: vc-6_5 example_test: vc-6_5 vc-6_5-stlport file_descriptor_test: vc-6_5 file_test: vc-6_5 filtering_stream_test: sun-5.8 vc-6_5 finite_state_filter_test: cw-9.4 sun-5.8 flush_test: sun-5.8 vc-6_5 gzip_test: msvc-7.1 msvc-8.0 sun-5.8 invert_test: vc-6_5 line_filter_test: sun-5.8 vc-6_5 mapped_file_test: vc-6_5 newline_test: sun-5.8 vc-6_5 null_test: vc-6_5 pipeline_test: sun-5.8 vc-6_5 positioning_test: vc-6_5 regex_filter_test: sun-5.8 vc-6_5 restrict_test: sun-5.8 vc-6_5 seekable_file_test: sun-5.8 vc-6_5 seekable_filter_test: sun-5.8 vc-6_5 stdio_filter_test: sun-5.8 vc-6_5 symmetric_filter_test: sun-5.8 vc-6_5 tee_test: sun-5.8 vc-6_5 wide_stream_test: sun-5.8 vc-6_5 zlib_test: msvc-7.1 msvc-8.0 |iterator| is_lvalue_iterator: sun-5.8 |lambda| extending_rt_traits: sun-5.8 operator_tests_simple: sun-5.8 |math| octonion_test: sun-5.8 quaternion_mult_incl_test: sun-5.8 quaternion_test: sun-5.8 vc-7_1-stlport special_functions_test: sun-5.8 |mpl| apply: gcc-4.1.0_linux_x86_64 gcc-4.1.1_sunos_i86pc sun-5.8 count: sun-5.8 count_if: sun-5.8 equal: sun-5.8 erase: sun-5.8 find: sun-5.8 insert: sun-5.8 insert_range: sun-5.8 lambda_args: sun-5.8 multiset: gcc-3.4.5_linux_x86_64 gcc-4.0.3_linux gcc-4.1.0_linux gcc-4.1.0_linux_x86_64 gcc-4.1.1_sunos_i86pc gcc-4_0_3_tru64 partition: sun-5.8 stable_partition: sun-5.8 vector_c: sun-5.8 |numeric/conversion| converter_test: borland-5_8_2 traits_test: borland-5_8_2 udt_example_0: borland-5_8_2 udt_support_test: borland-5_8_2 |numeric/interval| det: sun-5.8 test_float: vc-7_1-stlport |numeric/ublas| concepts: vc-7_1-stlport test2: vc-7_1-stlport test3: vc-7_1-stlport vc-7_1-stlport test4: vc-7_1-stlport test5: vc-7_1-stlport test6: vc-7_1-stlport |optional| optional_test: sun-5.8 optional_test_ref: sun-5.8 |parameter| basics: borland-5_6_4 borland-5_8_2 sun-5.8 duplicates: borland-5_6_4 borland-5_8_2 earwicker: borland-5_6_4 borland-5_8_2 macros: borland-5_6_4 borland-5_8_2 sun-5.8 maybe: vc-6_5 vc-6_5-stlport vc-7_0 mpl: borland-5_6_4 borland-5_8_2 preprocessor: borland-5_6_4 borland-5_8_2 sun-5.8 vc-6_5 vc-6_5-stlport python-parameter-test: vc-6_5 vc-6_5-stlport vc-7_0 sfinae: borland-5_6_4 borland-5_8_2 vc-6_5-stlport singular: borland-5_6_4 borland-5_8_2 unnamed: borland-5_6_4 borland-5_8_2 unnamed_fail: vc-6_5 vc-6_5-stlport vc-7_0 |pool| test_pool_alloc: qcc-3.3.5_cpp qcc-3.3.5_cpp qcc-3.3.5_cpp |program_options| cmdline_test: sun-5.8 cmdline_test_dll: cw-9.4 sun-5.8 options_description_test: sun-5.8 options_description_test_dll: cw-9.4 sun-5.8 parsers_test: sun-5.8 parsers_test_dll: cw-9.4 sun-5.8 positional_options_test: sun-5.8 positional_options_test_dll: cw-9.4 sun-5.8 unicode_test_dll: borland-5_8_2 cw-9.4 variable_map_test: sun-5.8 variable_map_test_dll: borland-5_8_2 cw-9.4 sun-5.8 winmain_dll: cw-9.4 |python| andreas_beyer: sun-5.8 args: sun-5.8 auto_ptr: sun-5.8 back_reference: sun-5.8 bases: gcc-3.2.3_linux gcc-3.3.6_linux gcc-3.4.5_linux sun-5.8 ben_scott1: sun-5.8 bienstman1: sun-5.8 bienstman2: sun-5.8 bienstman3: sun-5.8 borrowed: sun-5.8 callbacks: sun-5.8 const_argument: sun-5.8 crossmod_exception: sun-5.8 data_members: sun-5.8 defaults: sun-5.8 dict: sun-5.8 docstring: sun-5.8 enum: sun-5.8 exception_translator: sun-5.8 exec: cw-9.4 darwin-4.0.1 gcc-3.2.3_linux gcc-3.3.6_linux gcc-3.4.5_linux msvc-8.0 qcc-3.3.5_cpp qcc-3.3.5_cpp qcc-3.3.5_gpp qcc-3.3.5_gpp sun-5.8 extract: sun-5.8 implicit: sun-5.8 indirect_traits_test: sun-5.8 injected: sun-5.8 iterator: sun-5.8 keywords: sun-5.8 list: sun-5.8 long: sun-5.8 minimal: sun-5.8 multi_arg_constructor: sun-5.8 nested: sun-5.8 numpy: sun-5.8 object: sun-5.8 object_manager: sun-5.8 opaque: sun-5.8 operators: sun-5.8 pearu1: sun-5.8 pickle1: sun-5.8 pickle2: sun-5.8 pickle3: sun-5.8 pickle4: sun-5.8 pointee: gcc-3.2.3_linux gcc-3.3.6_linux gcc-3.4.5_linux sun-5.8 pointer_type_id_test: gcc-3.2.3_linux gcc-3.3.6_linux gcc-3.4.5_linux sun-5.8 pointer_vector: sun-5.8 polymorphism: sun-5.8 polymorphism2: sun-5.8 polymorphism2_auto_ptr: sun-5.8 properties: sun-5.8 raw_ctor: sun-5.8 return_arg: sun-5.8 select_arg_to_python_test: sun-5.8 select_from_python_test: darwin-4.0.1 qcc-3.3.5_cpp qcc-3.3.5_gpp sun-5.8 select_holder: sun-5.8 shared_ptr: sun-5.8 slice: sun-5.8 staticmethod: sun-5.8 stl_iterator: sun-5.8 str: sun-5.8 string_literal: sun-5.8 test_pointer_adoption: sun-5.8 try: sun-5.8 tuple: sun-5.8 upcast: gcc-3.2.3_linux gcc-3.3.6_linux gcc-3.4.5_linux sun-5.8 vector_indexing_suite: sun-5.8 virtual_functions: sun-5.8 voidptr: sun-5.8 wrapper_held_type: sun-5.8 |random| random_test: intel-linux-9.0 |rational| rational_test: borland-5_6_4 sun-5.8 vc-6_5 vc-6_5-stlport vc-7_0 |serialization| test_codecvt_null: qcc-3.3.5_gpp qcc-3.3.5_gpp qcc-3.3.5_gpp test_demo_fast_archive: sun-5.8 test_demo_fast_archive_dll: sun-5.8 test_demo_portable_archive_dll: vc-6_5 test_deque_xml_archive: msvc-8.0 test_non_default_ctor2_text_archive: qcc-3.3.5_cpp qcc-3.3.5_cpp qcc-3.3.5_cpp test_non_default_ctor2_text_archive_dll: qcc-3.3.5_cpp qcc-3.3.5_cpp qcc-3.3.5_cpp test_non_default_ctor2_text_warchive: qcc-3.3.5_cpp qcc-3.3.5_cpp qcc-3.3.5_cpp test_non_default_ctor2_text_warchive_dll: qcc-3.3.5_cpp qcc-3.3.5_cpp qcc-3.3.5_cpp test_reset_object_address: vc-7_0 test_reset_object_address_dll: vc-7_0 test_shared_ptr_132_binary_archive: sun-5.8 test_shared_ptr_132_binary_archive_dll: sun-5.8 test_shared_ptr_132_text_archive: sun-5.8 test_shared_ptr_132_text_archive_dll: sun-5.8 test_shared_ptr_132_text_warchive: sun-5.8 test_shared_ptr_132_text_warchive_dll: sun-5.8 test_shared_ptr_132_xml_archive: sun-5.8 test_shared_ptr_132_xml_archive_dll: sun-5.8 test_shared_ptr_132_xml_warchive: sun-5.8 test_shared_ptr_132_xml_warchive_dll: sun-5.8 test_shared_ptr_xml_warchive_dll: gcc-4.1.0_linux_x86_64 test_simple_class_binary_archive_dll: vc-6_5 test_simple_class_text_archive_dll: vc-6_5 test_simple_class_text_warchive_dll: vc-6_5 test_simple_class_xml_archive_dll: vc-6_5 test_simple_class_xml_warchive_dll: vc-6_5 test_utf8_codecvt: qcc-3.3.5_gpp qcc-3.3.5_gpp qcc-3.3.5_gpp test_variant_xml_archive: borland-5_8_2 test_variant_xml_archive_dll: borland-5_8_2 test_variant_xml_warchive: borland-5_8_2 test_variant_xml_warchive_dll: borland-5_8_2 test_vector_text_archive: gcc-3.4.5_linux_x86_64 test_vector_text_archive_dll: gcc-3.4.5_linux_x86_64 |signals| dead_slot_test: gcc-3.3.6 gcc-3.3.6_linux qcc-3.3.5_cpp qcc-3.3.5_cpp qcc-3.3.5_cpp qcc-3.3.5_gpp qcc-3.3.5_gpp qcc-3.3.5_gpp trackable_test: gcc-3.3.6 gcc-3.3.6_linux qcc-3.3.5_cpp qcc-3.3.5_cpp qcc-3.3.5_cpp qcc-3.3.5_gpp qcc-3.3.5_gpp qcc-3.3.5_gpp |smart_ptr| shared_ptr_delete_fail: sun-5.8 |spirit| bug_fixes: sun-5.8 bug_fixes_debug: sun-5.8 char_strings_test: sun-5.8 char_strings_test_debug: sun-5.8 epsilon_tests: sun-5.8 epsilon_tests_debug: sun-5.8 file_iterator_tests: sun-5.8 file_iterator_tests_debug: sun-5.8 if_p_as_parser_tests: sun-5.8 mix_and_match_trees: sun-5.8 scanner_value_type_tests: intel-linux-9.0 while_p_as_parser_tests: sun-5.8 |test| basic_cstring_test: sun-5.8 boost_check_equal_str: sun-5.8 foreach_test: sun-5.8 ifstream_line_iterator_test: sun-5.8 output_test_stream_test: sun-5.8 parameterized_test_test: vc-6_5 vc-6_5-stlport token_iterator_test: sun-5.8 |tr1| run_complex_overloads: vc-7_0 run_random: sun-5.8 vc-7_0 std_run_complex_overloads: sun-5.8 vc-7_0 std_run_random: sun-5.8 vc-7_0 std_test_array: vc-7_0 std_test_array_tricky: vc-7_0 std_test_bind: darwin-4.0.1 sun-5.8 vc-7_0 std_test_complex: sun-5.8 vc-7_0 std_test_function: sun-5.8 vc-7_0 std_test_hash: qcc-3.3.5_gpp qcc-3.3.5_gpp qcc-3.3.5_gpp sun-5.8 std_test_mem_fn: sun-5.8 std_test_random: sun-5.8 vc-7_0 std_test_reference_wrapper: sun-5.8 vc-7_0 std_test_regex: vc-7_0 std_test_result_of: sun-5.8 vc-7_0 std_test_shared_ptr: sun-5.8 vc-7_0 std_test_tuple: sun-5.8 vc-7_0 std_test_tuple_tricky: sun-5.8 vc-7_0 std_test_type_traits: sun-5.8 vc-7_0 test_array: vc-7_0 test_array_tricky: vc-7_0 test_bind: darwin-4.0.1 vc-7_0 test_boost: vc-7_1-stlport test_complex: vc-7_0 test_function: vc-7_0 test_hash: qcc-3.3.5_gpp qcc-3.3.5_gpp qcc-3.3.5_gpp vc-7_1-stlport test_random: sun-5.8 vc-7_0 vc-7_1-stlport test_reference_wrapper: vc-7_0 test_regex: vc-7_0 vc-7_1-stlport test_result_of: vc-7_0 test_shared_ptr: vc-7_0 test_tuple: vc-7_0 test_tuple_tricky: vc-7_0 test_type_traits: sun-5.8 vc-7_0 tr1_aligned_storage_test: vc-7_0 tr1_extent_test: sun-5.8 tr1_is_abstract_test: sun-5.8 tr1_is_array_test: vc-7_0 tr1_is_const_test: vc-7_0 tr1_is_empty_test: sun-5.8 tr1_is_floating_point_test: vc-7_0 tr1_is_function_test: sun-5.8 tr1_is_integral_test: vc-7_0 tr1_is_member_func_test: sun-5.8 tr1_is_member_obj_test: sun-5.8 tr1_is_object_test: sun-5.8 tr1_is_reference_test: sun-5.8 vc-7_0 tr1_is_void_test: vc-7_0 tr1_is_volatile_test: vc-7_0 tr1_rank_test: sun-5.8 tr1_tricky_function_type_test: sun-5.8 vc-7_0 tr1_tricky_partial_spec_test: vc-7_0 |type_traits| decay_test: sun-5.8 extent_test: sun-5.8 is_abstract_test: sun-5.8 is_empty_test: sun-5.8 is_function_test: sun-5.8 is_member_func_test: sun-5.8 is_member_obj_test: sun-5.8 is_object_test: sun-5.8 is_reference_test: sun-5.8 rank_test: sun-5.8 tricky_function_type_test: sun-5.8 |typeof| function_binding_emulation: sun-5.8 function_binding_native: vc-6_5 vc-6_5-stlport vc-7_0 nested_typedef_emulation: cw-9.4 odr_no_uns: vc-6_5 vc-6_5-stlport vc-7_0 template_tpl_emulation: sun-5.8 |utility| addressof_test: sun-5.8 operators_test: gcc-3.4.5_linux_x86_64 |utility/enable_if| lazy: sun-5.8 |wave| test_re2c_lexer: sun-5.8

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[intrusive_ptr] adding thread safety
by JOAQUIN LOPEZ MU?Z 07 Jul '06

07 Jul '06

Hello, A naive usage of intrusive_ptr involves having a refcount embedded in the pointed to object and providing add_red and release functions like: void intrusive_ptr_add_ref(const my_class* p) { ++(p->ref); } template<typename T> void intrusive_ptr_release(const my_class* p) { if(--(p->ref)==0){ // whatever } } But, AFAICS, this is not thread safe, as intrusive_ptr itself does not add any thread safety layer. So my question is how to efficiently provide add_ref and release functions which are thread safe (wrt to refcounting)? I can use a class-level boost::detail::lightweight_mutex in the obvious way, but I understand shared_ptr uses much more advanced mechanisms and maybe these are available for (semi)public consuption at boost/detail. Thank you, Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

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[Boost-bugs] [ boost-Bugs-1518640 ] bug in boost:format
by SourceForge.net 07 Jul '06

07 Jul '06

Bugs item #1518640, was opened at 2006-07-07 13:07 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1518640&group_… Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: function Group: None Status: Open Resolution: None Priority: 5 Submitted By: AndreiMS (andreims) Assigned to: Douglas Gregor (dgregor) Summary: bug in boost:format Initial Comment: Hello, software configuration: boost 1.33.1 stlport 5.0 example: std::string ret = boost::str(boost::format("%1%") % std::string("")); If you try to send as first argument the empty string to %-operator then you catch assertion failure in stl code: STLport-5.0.0\stlport\stl/debug/_string.h(308): STL error : Invalid argument to operation (see operation documentation) STLport-5.0.0\stlport\stl/debug/_string.h(308): STL assertion failure: (__s != 0) The null-pointer argument is passed from this: boost/boost/format/feed_args.hpp namespace boost { namespace io { namespace detail { template<class Ch, class Tr, class Alloc> void mk_str( std::basic_string<Ch,Tr, Alloc> & res, const Ch * beg, typename std::basic_string<Ch,Tr,Alloc>::size_type size, std::streamsize w, const Ch fill_char, std::ios_base::fmtflags f, const Ch prefix_space, // 0 if no space-padding bool center) // applies centered/left/right padding to the string [beg, beg+size[ // Effects : the result is placed in res. { typedef typename std::basic_string<Ch,Tr,Alloc>::size_type size_type; res.resize(0); if(w<=0 || static_cast<size_type>(w) <=size) { // no need to pad. res.reserve(size + !!prefix_space); if(prefix_space) res.append(1, prefix_space); res.append(beg, size); /// here "beg" is null } ... ////////////////////-------------------------- There is no assertion failure if you pass empty string as second argument, e.g. std::string ret = boost::str(boost::format("%1% %2%") % 2 % std::string("")); Best regards, Andrei Selikhanovich ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1518640&group_… Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Boost-bugs mailing list Boost-bugs(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs

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