March 2004 - Boost-users - lists.boost.org

Lambda question
by Anders Sundman 31 Mar '04

31 Mar '04

Hi all! I'm using the lambda library to compute the sum of squared differences, but I have encountered a puzzling problem. I would really appreciate if someone could explain it to me. This doesn't compile: std::inner_product(i1, i1+x, i2, 0.0, (_1 + _2), (_1*_1)(_1 - _2)); however, this does: std::inner_product(i1, i1+x, i2, 0.0, std::plus<double>(), (_1*_1)(_1 - _2)); The compiler message is very voluminous and hard to read. But I think this part might be of importance, the (double&, double) looks strange: /usr/include/c++/3.3/bits/stl_numeric.h:119: error: no match for call to `( boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambd a::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder <1> >, boost::lambda::lambda_functor<boost::lambda::placeholder<2> >, 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> > >) (double&, double)' /usr/include/boost/lambda/detail/lambda_functors.hpp:142: error: candidates are: typename T::sig<boost::tuples::null_type>::type boost::lambda::lambda_functor<Base>::operator()() const [with T = boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::la mbda::plus_action>, Many thanks in advance Anders Sundman

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Error building Boost_1_30_0
by Albert Gome 31 Mar '04

31 Mar '04

Hi, I am build Boost_1_30_0 on HPUX11.11 using gcc 3.3.3. I m getting these errors. skipping Boost.Python library build due to missing or incorrect configuration couldn't find Python.h in "/usr/local/include/python2.2" . . . . . ...patience... ...found 2254 targets... ...updating 295 targets... gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/c_regex_traits.o libs/regex/src/c_regex_traits.cpp: In static member function `static void boost::c_regex_traits<char>::update()': libs/regex/src/c_regex_traits.cpp:655: call of overloaded `getlocale(int)' is ambiguous /usr/include/locale.h:114: candidates are: locale_data* getlocale(int) libs/regex/src/c_regex_traits.cpp:62: const char* <unnamed>::getlocale(int) libs/regex/src/c_regex_traits.cpp:658: call of overloaded `getlocale(int)' is ambiguous /usr/include/locale.h:114: candidates are: locale_data* getlocale(int) libs/regex/src/c_regex_traits.cpp:62: const char* <unnamed>::getlocale(int) libs/regex/src/c_regex_traits.cpp:660: call of overloaded `getlocale(int)' is ambiguous /usr/include/locale.h:114: candidates are: locale_data* getlocale(int) libs/regex/src/c_regex_traits.cpp:62: const char* <unnamed>::getlocale(int) libs/regex/src/c_regex_traits.cpp:663: call of overloaded `getlocale(int)' is ambiguous /usr/include/locale.h:114: candidates are: locale_data* getlocale(int) libs/regex/src/c_regex_traits.cpp:62: const char* <unnamed>::getlocale(int) g++ -c -Wall -ftemplate-depth-100 -DBOOST_REGEX_NO_LIB=1 -DBOOST_REGEX_STATIC_LINK=1 -g -O0 -fno-inline -I"libs/regex/build" -I "/mnt/r7/apal3/lib/boost_1_30_0" -o "libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/c_regex_traits.o" "libs/regex/build/../src/c_regex_traits.cpp" ...failed gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/c_regex_traits.o... gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/c_regex_traits_common.o gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/cpp_regex_traits.o gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/cregex.o gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/fileiter.o gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/posix_api.o gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/regex.o gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/regex_debug.o gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/regex_synch.o gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/debug/runtime-link-dynamic/w32_regex_traits.o . . . . . ...skipped <libs!regex!build/libboost_regex.a/gcc/debug/runtime-link-dynamic>libboost_regex_debug.a for lack of <libs!regex!build/libboost_regex.a/gcc/debug/runtime-link-dynamic>libboost_regex_debug.a(c_regex_traits.o)... ...skipped <!libs!regex!build!bin-stage>libboost_regex_debug.a for lack of <libs!regex!build/libboost_regex.a/gcc/debug/runtime-link-dynamic>libboost_regex_debug.a... gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/release/runtime-link-dynamic/c_regex_traits.o libs/regex/src/c_regex_traits.cpp: In static member function `static void boost::c_regex_traits<char>::update()': libs/regex/src/c_regex_traits.cpp:655: call of overloaded `getlocale(int)' is ambiguous /usr/include/locale.h:114: candidates are: locale_data* getlocale(int) libs/regex/src/c_regex_traits.cpp:62: const char* <unnamed>::getlocale(int) libs/regex/src/c_regex_traits.cpp:658: call of overloaded `getlocale(int)' is ambiguous /usr/include/locale.h:114: candidates are: locale_data* getlocale(int) libs/regex/src/c_regex_traits.cpp:62: const char* <unnamed>::getlocale(int) libs/regex/src/c_regex_traits.cpp:660: call of overloaded `getlocale(int)' is ambiguous /usr/include/locale.h:114: candidates are: locale_data* getlocale(int) libs/regex/src/c_regex_traits.cpp:62: const char* <unnamed>::getlocale(int) libs/regex/src/c_regex_traits.cpp:663: call of overloaded `getlocale(int)' is ambiguous /usr/include/locale.h:114: candidates are: locale_data* getlocale(int) libs/regex/src/c_regex_traits.cpp:62: const char* <unnamed>::getlocale(int) g++ -c -Wall -ftemplate-depth-100 -DNDEBUG -DBOOST_REGEX_NO_LIB=1 -DBOOST_REGEX_STATIC_LINK=1 -O3 -finline-functions -Wno-inline -I"libs/regex/build" -I "/mnt/r7/apal3/lib/boost_1_30_0" -o "libs/regex/build/bin/libboost_regex.a/gcc/release/runtime-link-dynamic/c_regex_traits.o" "libs/regex/build/../src/c_regex_traits.cpp" ...failed gcc-C++-action libs/regex/build/bin/libboost_regex.a/gcc/release/runtime-link-dynamic/c_regex_traits.o... Does anybody know how to reolve this? Thnks Albert --------------------------------- Do you Yahoo!? Yahoo! Finance Tax Center - File online. File on time.

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boost::variant's and > 10 supported types
by Preston A. Elder 31 Mar '04

31 Mar '04

Hi, How do I support > 10 types in a variant without having support for make_variant_over (since I wish to still support Borland and MSVC 6/.NET (aka. 7, not 7.1), as well as gcc). To be precise, I need 18 types to be supported. -- PreZ Founder The Neuromancy Society http://www.neuromancy.net

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boost::filesystem::exists() & GetfileAttributesA
by Sebastian Orfino 31 Mar '04

31 Mar '04

Hi, I am experiencig a problem with exists() and its Windows implementation with GetFileAttributes API. I am using exists() prior to the scan of a directory to see if it exists; the fact is that on W2K (just tested it on that OS) after a day or two GetFileAttributesA() returns INVALID_FILE_ATTRIBUTES but the path does exists (it is a UNC-style path). After a restart of the app, all works fine. So, should I use exists() this way ? I don't know why not. Or just use directory_iterator and scan the hot-folder right away catching any exceptions ?. I don't want to iterate over a direcotry that doesn't exists if I could knew that in advance; besides, I don't know if that will work anyway. Does anyone know somthing about this GetFileAttributesA/boost::exists() behavior ? Thanks in advance, Sebastian.

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vc7.1-stlport
by GoochRules! 31 Mar '04

31 Mar '04

Greetings, I am attempting to build boost using "-sTools=vc7.1-stlport". I have copied the STLport libaries to C:\src\lib. The STLport headers are in c:\src\include\stlport. I extracted the STLport archive to c:\src\STLport-4.6.1. I have tried STLPORT_PATH=c:\src, c:\src\lib, c:\src\include, and c:\src\include\stlport with STLPORT_VERSION unset, and set to 4.6.1, as well as both unset. Boost succeeds in building, yet does not link against the STLport libraries (as reported by depends.exe), but rather to MSVCP71.DLL and MSVCP71.DLL (the C++ and C runtime libraries provided by vc7.1 I presume). I have ensured that c:\src\lib is first in %LIB% and c:\src\include\stlport;c:\src\include; is first in %INCLUDE% Any suggestions for what my STLport setup should look like are appreciated, as well as pointers on getting boost to link against the STLport libraries. --Matthew Peltzer

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Boost Python on Mac OS X
by James Mastro 31 Mar '04

31 Mar '04

Hello all, I'm trying to use Boost Python on Mac OS X 10.3. I'm following along with what is at http://www.boost.org/libs/python/doc/tutorial/doc/ building_hello_world.html. After using bjam like this: bjam -sTOOLS=darwin the following are built: libboost_python.dylib hello.so This seems to be correct. I'm not totally sure where they are supposed to go, so I put them in next to Python in the Python framework so Python could find them to import. It found them, but an "import hello" in Python resulted in: ImportError: Failure linking new module: ../../../../bin/boost/libs/python/build/libboost_python.dylib/darwin/ debug/shared-linkable-true/libboost_python.dylib: dyld: /Applications/MacPython-2.3/PythonIDE.app/Contents/MacOS/PythonIDE can't open library: ../../../../bin/boost/libs/python/build/libboost_python.dylib/darwin/ debug/shared-linkable-true/libboost_python.dylib (No such file or directory, errno = 2) Before putting the 2 libs in, "import hello" found nothing. So I assume Python is finding the hello module now, but not liking it. Can anyone show me where I've gone wrong? Many thanks. -jim

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Installing pyste
by Yannick Patois 31 Mar '04

31 Mar '04

Hi, When running "bjam install" from top-level directory, even with PYTHON_ROOT set correctly, it only creates shared libs but doesnt build and install pyste. What should be done to install it properly ? I finally went to libs/python/pyste/install and executed: python setup.py install I would expect this to be wrapped in some top-level command. Did I miss something in the doc ? Thanks, Yannick

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Compilation problems on Linux
by mayankg＠iiitb.ac.in 31 Mar '04

31 Mar '04

Hi, We are trying to use the libboost_python.so library in Linux with our project. When we try to compile the C++ file of our project having all the boost interfaces, we get the following compilation error only on Linux. Although on Windows it works fine. We are using the Python 2.2.3 and Boost 1.30.2 versions. /usr/include/boost/python/converter/as_to_python_function.hpp:28: sorry, unimplemented: ` method_call_expr' not supported by dump_expr /usr/include/boost/python/converter/as_to_python_function.hpp:28: sorry, unimplemented: ` method_call_expr' not supported by dump_expr /usr/include/boost/python/converter/as_to_python_function.hpp:28: sorry, unimplemented: ` method_call_expr' not supported by dump_expr /usr/include/boost/python/converter/as_to_python_function.hpp:28: sorry, unimplemented: ` method_call_expr' not supported by dump_expr Please help, Regards, Mayank

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Location and namespace of a boost library (say, iterators)
by Deane Yang 31 Mar '04

31 Mar '04

I'm sorry if I'm being dumb about this, but I've run into the following difficulty a couple of times with boost libraries. I've decided to try using the new boost iterator library. Based on the documentation, I think I want to use iterator_adaptor. But scanning through the documentation, I don't immediately see - what namespace iterator_adaptor lives in. I assume it's just boost, but it probably doesn't hurt to mention this explicitly, since some boost libraries use sub-namespaces. - what header file to include. I couldn't find this in the documentation. I can figure all of this out, but it is helpful to have it specified in the documentation.

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Installing Boost 1_30_0 on HPUX
by Albert Gome 31 Mar '04

31 Mar '04

Hi, I am new to BOOST and i like to install that on HPUX11.11. I have downloaded BOOST_1_30_0 and have gcc installed on HPUX. What is the efficient way of installing it. ie the parameters with the bjam. Thanks Albert __________________________________ Do you Yahoo!? Yahoo! Finance Tax Center - File online. File on time. http://taxes.yahoo.com/filing.html

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