September 2004 - Boost-users

boost graph meant to contain classes and functions?
by Stephen torri 22 Sep '04

22 Sep '04

I see that the boost graph library is used to contain data but can it be used to contain a class which a visitor moves along the graph per a preset algorithm calling interfacing functions as it moves along? Here is an example. class Color_Base { virtual ~Color_Base(){} virtual std::string get_Name () = 0; }; class Red : Color_Base { virtual ~Red (){} virtual std::string get_Name () { return std::string("Red"); } }; class Yellow : Color_Base { virtual ~Yellow (){} virtual std::string get_Name () { return std::string("Yellow"); } }; class Blue : Color_Base { virtual ~Blue (){} virtual std::string get_Name () { return std::string("Blue"); } }; So we could have a graph like | Blue -- Red | / | / | / Yellow I have a visitor called Color_Visitor which has the following pseudo code: for each vertice in graph visit vertice call get_Name() print result Stephen -- Email: storri(a)torri.org

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No defines using bjam on Windows with msvc
by Phillip Seaver 22 Sep '04

22 Sep '04

As I said in an earlier post, I'm trying to start using jam for our projects. I'm using Boost.Jam ver 3.1.4. When I build on Windows with TOOLS=msvc and use "bjam -d2", the command-line doesn't have any define flags on it. Several of our source files rely on "WIN32", e.g. to determine the platform. Has anyone seen this before? I feel like I'm overlooking something obvious, but I haven't been able to figure it out. Here's the beginning of the output from "bjam -d2": ***** ...found 156 targets... ...updating 11 targets... vc-Cc ..\..\libs\ETSopt\bin\libetsopt.lib\msvc\debug\runtime-link-dynamic\etsopt .obj "cl" /Zm800 -nologo -c /Z7 /Od /Ob0 /GX /GR /MDd -I"..\..\libs\ETSopt" -I"C:\PROGRA~1\MICROS~2\VC98\include" -Fo"..\..\libs\ETSopt\bin\libetsopt.lib\ msvc\debug\runtime-link-dynamic\etsopt.obj" "etsopt.c" etsopt.c ***** Thanks in advance, Phillip

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Re: [Boost-users] [Linker error] undefined reference to`boost::gregorian::greg_month::as_short_string() const'
by aqsis＠mail.tele2.co.uk 21 Sep '04

21 Sep '04

I understand what you mean now. In that case you would need to pass the filter name into the DSO function as a parameter. So your DSO declaration would look like... SHADEOP_TABLE(shadeopname) = { { "float shadeopname_fs(float, string)", "", "" }, . . }; And the argv[] argument passed to the method would contain the filter name as it's second value, i.e. SHADEOP(shadeopname_fs) { float *result = (float *)argv[0]; float x = *(float *)argv[1]; STRING_DESC *filt = (STRING_DESC *)argv[1]; if(strcmp(filt->s, "box")==0) { /* Filter with a box filter */ . . . Hope this helps. Paul G Original Message: ----------------- From: Jeff Garland jeff(a)crystalclearsoftware.com Date: Tue, 21 Sep 2004 05:15:39 -0700 To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] [Linker error] undefined reference to`boost::gregorian::greg_month::as_short_string() const' On Mon, 20 Sep 2004 20:33:51 -0700 (PDT), Zhoujie Mao wrote I'm going to presume the built library file libboost_date_time-gcc-1_31.a is in D:/boost/lib. Please double check that. > Below is part of my make file > CPP = g++.exe > CC = gcc.exe > WINDRES = windres.exe > RES = > OBJ = main.o $(RES) > LINKOBJ = main.o $(RES) > LIBS = -L"D:/Dev-Cpp499/lib" -L"D:/boost/lib" > -L"D:/boost/lib/libboost_date_time-gcc-1_31.a" ^^^^^^^^^^^^ this looks wrong ^^^^^^^^^^^ change it to the following: -lboost_date_time-gcc-1_31 so your LIBS line looks like: LIBS = -L"D:/Dev-Cpp499/lib" -L"D:/boost/lib" -lboost_date_time-gcc-1_31 > I did include the libboost_date_time-gcc-1_31 but it > did not work. Well, not actually because the -L controls the search path and you can't point it directly to the library.... HTH, Jeff _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ .

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setting thread priority?
by Simmons, Aaron 21 Sep '04

21 Sep '04

In Boost.Threads, are there plans to allow adjustment of a thread's priority? Thanks, aaron

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sockets/pipes
by Simmons, Aaron 21 Sep '04

21 Sep '04

Does Boost have named-pipes and/or sockets classes? If no... Are any in the works? Does anyone know of a good C++ pipes and/or sockets wrapper classes? Thanks, Aaron Simmons

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RE: [Boost-users] sockets/pipes
by Richard Reitmeyer 20 Sep '04

20 Sep '04

I'd suggest ACE. Look for Douglas Schmidt's stuff at wustl. > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Simmons, Aaron > Sent: Monday, September 20, 2004 2:12 PM > To: boost-users(a)lists.boost.org > Subject: [Boost-users] sockets/pipes > > > Does Boost have named-pipes and/or sockets classes? > > If no... Are any in the works? Does anyone know of a good C++ pipes > and/or sockets wrapper classes? > > > > Thanks, > Aaron Simmons > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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RE: [Boost-users] Can boost::tokenizer tokenize 2byte character s tring?
by Rozental, Gennadiy 20 Sep '04

20 Sep '04

If it 2byte why are you using boost::char_separator<char>? Shouldn't you be using boost::char_separator<wchar_t>? Gennadiy. > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Lee, Joo-Young > Sent: Saturday, September 18, 2004 12:39 AM > To: boost-users(a)lists.boost.org > Subject: [Boost-users] Can boost::tokenizer tokenize 2byte > character string? > > > Hi. > > I try to use 'boost::tokenizer<boost::char_separator<char> >' > to separate 2byte character string like Korean, Japanese, or Chinese. > > But, I found that it does not works correctly. > > Is there a solution? > > Thanks for the help, > > Lee Joo-Young > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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RE: [Boost-users] Can boost::tokenizer tokenize 2byte character string?
by Ben Hutchings 20 Sep '04

20 Sep '04

Gennadiy Rozental <gennadiy.rozental(a)thomson.com> wrote: > If it 2byte why are you using boost::char_separator<char>? > > Shouldn't you be using boost::char_separator<wchar_t>? I think Lee Joo-Young is talking about multibyte strings in an encoding such as GB2312 and Shift_JIS that uses 1 or 2 bytes per character rather than wide strings that use a fixed 2 bytes per character on certain platforms (or rather, used to until UTF-16 came along). Ben.

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RE: [Boost-users] Can boost::tokenizer tokenize 2byte character string?
by Ben Hutchings 20 Sep '04

20 Sep '04

Joo-Young Lee <trowind(a)gmail.com> wrote: > I try to use 'boost::tokenizer<boost::char_separator<char> >' > to separate 2byte character string like Korean, Japanese, or > Chinese. > > But, I found that it does not works correctly. > > Is there a solution? You should probably convert them to wide strings and use the wchar_t version instead. The standard C++ library and Boost libraries tend not to work well with multibyte encodings.

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boost::serialization problem, derived class through shared_ptr
by Jedediah Smith 20 Sep '04

20 Sep '04

I'm trying to serialize a derived class through a shared_ptr<> to the base class. I'm getting an unregistered class exception even though my derived class is registered with register_type<>. It seems the exception is being thrown while trying to serialize boost::detail::sp_counted_base which I believe is part of shared_ptr. Could this be an internal error in the serialization library?

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