October 2003 - Boost-users - lists.preview.boost.org

RE: [Boost-users] Re: Build+Install+/Zc:wchar_t in Visual studio builds
by Ben Hutchings 31 Oct '03

31 Oct '03

Edward Diener <eddielee(a)tropicsoft.com> wrote: > John Maddock wrote: > > Guys, > > > > We could of course create a new build variant to handle this, but > > with 8 regex lib/dll variants already I'm not keen to add another 8 > > (apart from anything else testing already takes too long). > > I think you have to do this John if you want to support both the C++ > wchar_t and the MS wchar_t in Boost libraries. Although there are > VC++ predefined macros, _WCHAR_T_DEFINED and _NATIVE_WCHAR_T_DEFINED, > which are defined when /Zc:wchar_t is used, they are also stupidly > defined, according to the documentation, when typedef unsigned short > wchar_t is used ( talk about idiotic MS decisions ). That appears to be a documentation bug. I checked this in VC++ 7.1 and _NATIVE_WCHAR_T_DEFINED is not defined by <cstddef>. There is no sign of a #define _NATIVE_WCHAR_T_DEFINED in the headers for version 7.0 or 7.1. > So Boost needs to use a macro which the end-programmer must define > which tells whether or not /Zc:wchar_t is being used or not, and > create another set of libraries accordingly. Even in the absence of a macro, this test works: #include <cstddef> #include <iostream> #include <ostream> #include "boost/type_traits.hpp" int main() { std::cout << "/Zc:wchar_t was "; if (!boost::is_same<wchar_t, __wchar_t>::value) std::cout << "not "; std::cout << "used\n"; }

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RE: [Boost-users] vc++
by Ben Hutchings 31 Oct '03

31 Oct '03

adel.essafi <adel.essafi(a)laposte.net> wrote: > is it possible to compile boost project directly with vc++ 6.0 without > using commande lines. if yes how? Yes - in the IDE, create a "makefile" project and enter the command lines and targets in the project settings. It would be nice to have project files included in the distributed source, but unfortunately the file format is different for every IDE and for every different version of the Visual C++ IDE so it would be difficult to keep them all up-to-date. Ben.

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[BLL] How to search in a list for an object comparing a data member?
by Gianluca Silvestri 31 Oct '03

31 Oct '03

Hi all, What I want to achieve is a code similar to this: struct Foo { int fDataMember;} int main() { std::vector<Foo> foos; Foo fo; std::find_if(foos.begin(), foos.end(), _1->fDataMember == fo.fDataMember); //<-- won't compile; } I know I could use a functor object but this is just an example for a more general need. Thanks, Gianluca

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vc++
by adel.essafi 30 Oct '03

30 Oct '03

hi list is it possible to compile boost project directly with vc++ 6.0 without using commande lines. if yes how? thanks Accédez au courrier électronique de La Poste : www.laposte.net ; 3615 LAPOSTENET (0,34/mn) ; tél : 08 92 68 13 50 (0,34/mn)

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Linker problem using boost::regex with VC6.5
by Sven Van Echelpoel 29 Oct '03

29 Oct '03

Hi, I'm having a strange problem when I try to include boost::regex in my project (VC6.5 on Win2K). I'm not using Build to build a separate regex dll but rather include the source files directly in the project (or rather in a small utility static library). I've defined BOOST_REGEX_STATIC_LINK to avoid __declspec( dllimport ) / __declspec( dllexport ). Although everything compiles just fine the linker complains that it cannot find the library boost_regex_vc6_mdsd.lib. Further investigation revealed that it is actuallty listed somewhere as an additional default library (the linker outputs this when you switch on link progress messages). Searching through the sourcecode for #pragma comment( lib, ... ) and #pragma comment( linker, ... ) directives came up empty as did a search for boost_regex_vc6_mdsd.lib in all sources and headers. I got it to link by letting the linker ignore boost_regex_vc6_mdsd.lib. Even so I still would like to know where this is comming from. Any ideas? Sven

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RE: [Boost-users] Linker problem using boost::regex with VC6.5
by Sven Van Echelpoel 29 Oct '03

29 Oct '03

Sven Van Echelpoel wrote: [...] > Are you sure that that's defined for all translation units that use or > implement Boost.Regex? Yep. Double checked it now and it is defined at the project level for every project [...] >> Searching through the sourcecode for >> #pragma comment( lib, ... ) and #pragma comment( linker, ... ) >> directives came up empty as did a search for boost_regex_vc6_mdsd.lib >> in all sources and headers. > > It's in "boost/regex/v3/regex_library_include.hpp". Found it. I can now see I need to define the guard macro BOOST_REGEX_NO_LIB to disable the auto-linking. Doing so makes everything build just fine. Thanks, Sven

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CEST timezone conversion, boost date_time
by Erik Thiele 29 Oct '03

29 Oct '03

hi. i am trying to convert between UTC and CEST/CET (Europe/Berlin) i don't find documentation or suitable functions in the Wiki, the examples or the documentation. also i don't understand the sourcecode of the time zone stuff. but i found that eu_dst_trait exists, but don't know what that is and how to use it. any ideas? cu & thx erik -- Erik Thiele

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Any thoughts on transparent marshalling?
by Hurd, Matthew 28 Oct '03

28 Oct '03

I wish to do some transparent marshalling... That is, via a policy, or some such, either call a function / functor returning a void or put stuff on a message queue for transportation. This is strictly asynch stuff, hence the void result or putting the message in the ether. The message queues I have in mind are tibrv, udp, tcp, shared mem, email, internal process queue... I see the serialization w.i.p. library will be useful here. Any tips on some useful boost libs / techniques to do this? Regards, Matt Hurd hurdm(a)sig.com +61.2.8226.5029

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Newbie uBLAS question
by J. Scott Pendergrass 28 Oct '03

28 Oct '03

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RE: [Boost-users] Linker problem using boost::regex with VC6.5
by Ben Hutchings 28 Oct '03

28 Oct '03

Sven Van Echelpoel wrote: > I'm having a strange problem when I try to include boost::regex in my > project (VC6.5 on Win2K). I'm not using Build to build a separate > regex dll but rather include the source files directly in the project > (or rather in a small utility static library). I've defined > BOOST_REGEX_STATIC_LINK to avoid __declspec( dllimport ) / __declspec( > dllexport ). Are you sure that that's defined for all translation units that use or implement Boost.Regex? > Although everything compiles just fine the linker complains that it > cannot find the library boost_regex_vc6_mdsd.lib. Further > investigation revealed that it is actuallty listed somewhere as an > additional default library (the linker outputs this when you switch > on link progress messages). Searching through the sourcecode for > #pragma comment( lib, ... ) and #pragma comment( linker, ... ) > directives came up empty as did a search for boost_regex_vc6_mdsd.lib > in all sources and headers. It's in "boost/regex/v3/regex_library_include.hpp". > I got it to link by letting the linker ignore > boost_regex_vc6_mdsd.lib. > Even so I still would like to know where this is comming from. Any > ideas? I know I had some kind of problem with the above-mentioned header generated the wrong library name when I first started using Boost.Regex so I disabled the header by defining its guard macro before including "boost/regex.hpp". However, I removed that just now and didn't have any problems. Have you created your own project definition which uses a different library name? It's probably easier just to use the makefile (vc6.mak) in Visual Studio. You can do this by selecting "Insert Project into Workspace", selecting "vc6.mak" from the build directory, and thus creating a project that calls nmake on the makefile. Then you just need to edit the project settings to specify what the target names are for each configuration.

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