May 2004 - Boost-users - lists.preview.boost.org

Regex++ Installation Problems
by kinshuk srivastava 30 May '04

30 May '04

Hi I had written earlier too regarding installation problems with the regex++...sorry for not providing the complete details last time..But I am again sending the errors... The Gcc compiler which m using is gcc3.2 nd the operating system is SuSE 9.6...I think the regex++ version is 331... the following are the errors: make -fgcc.mak mkdir -p gcc mkdir -p gcc/boost_regex g++ -o gcc/boost_regex/c_regex_traits.o -c -O2 -I../../../ ../src/c_regex_traits.cpp g++ -o gcc/boost_regex/c_regex_traits_common.o -c -O2 -I../../../ ../src/c_regex_traits_common.cpp g++ -o gcc/boost_regex/cpp_regex_traits.o -c -O2 -I../../../ ../src/cpp_regex_traits.cpp g++ -o gcc/boost_regex/cregex.o -c -O2 -I../../../ ../src/cregex.cpp ../../../boost/regex/v3/regex_match.hpp: In member function `unsigned int boost::RegEx::GrepFiles(bool (*)(const char*, const boost::RegEx&), const char*, bool, unsigned int)': ../../../boost/regex/v3/regex_match.hpp:1937: Internal compiler error in expand_call, at calls.c:3049 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions. make: *** [gcc/boost_regex/cregex.o] Fehler 1 Thanx in advance... -Kinshuk ________________________________________________________________________ Yahoo! India Matrimony: Find your partner online. http://yahoo.shaadi.com/india-matrimony/

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bjam build failed (winxp, mingw)
by krejci.lukas＠volny.cz 29 May '04

29 May '04

Hi, today I downloaded boost 1.31.0 and precompiled bjam. then I invoked bjam: cd C:\_projects\_coding\_sdk\boost_1_31_0 bjam -s"TOOLS=mingw" -s"MINGW_ROOT_DIRECTORY=C:\Program Files\Dev-Cpp" --prefix=C:\_projects\_coding\@mingw --with-python-root="C:\Program Files\Python23" --with-pydebug install and this was the output: ...patience... ...found 9330 targets... ...updating 3796 targets... MkDir1 bin spawn: No such file or directory I am new to jam/bjam. Can anyone help me with this problem? Thanks for your help, L.

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Re: Using filenames starting with a dot
by Steven Woolgar 28 May '04

28 May '04

> I wanted to create a hidden files (for configuration etc) by starting > the filename with a dot on a Linux system. > The following line aborts the program when filename is a std::string > starting with a dot: > > > boost::filesystem::path filename_complete = basepath / filename; > > Are there any tricks for that? I think in fact an exception is being thrown. Wrap it in a try block to find out what is getting thrown. Once you know, you will find that the code has traits to control the behavior in regards to non-standard naming conventions. Woolie

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Calling thread::join from another thread?
by Wolfgang Meyer 28 May '04

28 May '04

Given a thread A created by a thread B. Is calling the join-method of A from a thread C a well-defined operation? (With C != B && C != A) It seems to work fine, but I want to make sure that this was not just 'luck'. Assumed, the operation is not defined: Can someone imagine a way to wrap a thread such that is can be joined by an arbitrary other thread? Thanks for clarification, Wolfgang Meyer

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Using filenames starting with a dot
by Uli Türk 28 May '04

28 May '04

Hi everyone! I wanted to create a hidden files (for configuration etc) by starting the filename with a dot on a Linux system. The following line aborts the program when filename is a std::string starting with a dot: > boost::filesystem::path filename_complete = basepath / filename; Are there any tricks for that? Thanks! Uli

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Re: [Boost-users] boost::thread, boost::bind, and member functions
by Mike Feldmeier 27 May '04

27 May '04

Hah! I found the answer in a python mailing list from someone who was having trouble building the python part of boost in conjunction with stlport. Changing my build batch to the following was the key: set stlport-iostream="on" set STLPORT_VERSION="4.6.2" set STLPORT_PATH="C:/" bjam "-sTOOLS=vc7.1-stlport" "-sBUILD=debug release" install Thanks to everyone for their help! Mike _________________________________________________________________ MSN Toolbar provides one-click access to Hotmail from any Web page FREE download! http://toolbar.msn.click-url.com/go/onm00200413ave/direct/01/

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RE: [Boost-users] lexical_cast tests failed
by Rozental, Gennadiy 27 May '04

27 May '04

> I was testing out lexical_cast, and I would expect that for > any value v of type T, it should be true that > > v == lexical_cast<T>(lexical_cast<string>(v)) > > but this does not appear to work for float or double in all > cases. In particular, the following tests failed: > > float value = numeric_values<float>::min(); > BOOST_CHECK_EQUAL(value, > lexical_cast<float>(lexical_cast<string>(value))); > value = numeric_values<float>::max(); > BOOST_CHECK_EQUAL(value, > lexical_cast<float>(lexical_cast<string>(value))); > > double dvalue = numeric_values<double>::min(); > BOOST_CHECK_EQUAL(dvalue, > lexical_cast<double>(lexical_cast<string>(dvalue))); > dvalue = numeric_values<double>::max(); > BOOST_CHECK_EQUAL(dvalue, > lexical_cast<double>(lexical_cast<string>(dvalue))); > > Should I have expected these tests to pass? > > thanks, > > --chris Try to use BOOST_CHECK_CLOSE instead. Don't use BOOST_CHECK_EQUAL to compare floats. Gennadiy.

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lexical_cast tests failed
by Chris Surridge 27 May '04

27 May '04

I was testing out lexical_cast, and I would expect that for any value v of type T, it should be true that v == lexical_cast<T>(lexical_cast<string>(v)) but this does not appear to work for float or double in all cases. In particular, the following tests failed: float value = numeric_values<float>::min(); BOOST_CHECK_EQUAL(value, lexical_cast<float>(lexical_cast<string>(value))); value = numeric_values<float>::max(); BOOST_CHECK_EQUAL(value, lexical_cast<float>(lexical_cast<string>(value))); double dvalue = numeric_values<double>::min(); BOOST_CHECK_EQUAL(dvalue, lexical_cast<double>(lexical_cast<string>(dvalue))); dvalue = numeric_values<double>::max(); BOOST_CHECK_EQUAL(dvalue, lexical_cast<double>(lexical_cast<string>(dvalue))); Should I have expected these tests to pass? thanks, --chris

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[regex] invalid syntax for non-gready repeats
by Thorsten Ottosen 27 May '04

27 May '04

Hi, this inocent code throws an exception: static const regex rpath( "Return-Path:(.*?)Received: ", regex_constants::icase ); according to http://www.boost.org/libs/regex/doc/syntax.html this is how non-gready repeats are specified. Can anybody figure out what is wrong? Thanks Thorsten

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Use of a member pointer to a member function in for_each - is it possible?
by Vesselin Kostadinov 27 May '04

27 May '04

Hi, I am struggling to find the proper combination of ataptors/binders to use a member pointer to a member function in a for_each. Is this possible at all? Any help is appreciated. Here is the code: #include <iostream> #include <algorithm> #include <vector> #include <boost/bind.hpp> #include <boost/ref.hpp> using namespace std; class foo { private: int value; void default_proc(int& x) { cout << "default_proc. Value = " << value << ", Param = " << x << "\n";} void init1_proc(int& x) { cout << "init1_proc. Value = " << value << ", Param = " << x << "\n";} public: void (foo::*func_ptr)(int& x); //yes, I need the reference here foo(int init) : value(init), func_ptr(init == 1 ? &foo::init1_proc : &foo::default_proc) {} }; int main() { vector<foo> foos; foos.push_back(foo(0)); foos.push_back(foo(1)); foos.push_back(foo(2)); int param = 3; //i need this functionality: //prints "default_proc. Value = 0, Param = 3": (foos[0].*foos[0].func_ptr)(param); //prints "init1_proc. Value = 1, Param = 3": (foos[1].*foos[1].func_ptr)(param); //prints "default_proc. Value = 2, Param = 3": (foos[2].*foos[2].func_ptr)(param); //using the right combination of for_each, bind, ref, mem_fn, etc: // std::for_each(foos.begin(), foos.end(), // boost::bind(???????), // _1, boost::ref(param)); } The compiler is Borland C++ 5.6.4 for Win32. Thanks in advance

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