- Boost-users - lists.boost.org

Visual Studio Professional 2012
by Scott Alexander 03 Jun '13

03 Jun '13

Hi, Does Boost 1.51 support Visual Studio Professional 2012? I would like to use Boost 1.53 but the latest installer I can find is for 1.51 (from http://www.boostpro.com/download/) Where can I find and installer for the latest version? Thanks, Scott

3 2

Fwd: Compile error using BOOST_FUSION_DONT_USE_PREPROCESSED_FILES
by Fernando Gomes da Silva 03 Jun '13

03 Jun '13

Em quarta-feira, 29 de maio de 2013 17h11min09s UTC-3, Fernando Gomes da Silva escreveu: > > I'm having trouble setting the max template parameters for Boost Fusion > Tuples. > > I've read the source code and found that I can set > BOOST_FUSION_DONT_USE_PREPROCESSED_FILES and set FUSION_MAX_VECTOR_SIZE to > the given number. > > Using MSVC 2012 and using a value of 51, I get the following error: > > \boost_1_53_0\boost\fusion\container\vector\detail\vector_n_chooser.hpp(65): > error C2143: syntax error : missing ';' before '<' > \boost_1_53_0\boost\fusion\container\vector\detail\vector_n_chooser.hpp(66) > : see reference to class template instantiation > 'boost::fusion::detail::vector_n_chooser<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16,T17,T18,T19,T20,T21,T22,T23,T24,T25,T26,T27,T28,T29,T30,T31,T32,T33,T34,T35,T36,T37,T38,T39,T40,T41,T42,T43,T44,T45,T46,T47,T48,T49,T50>' > being compiled > \boost_1_53_0\boost\fusion\container\vector\detail\vector_n_chooser.hpp(65): > error C4430: missing type specifier - int assumed. Note: C++ does not > support default-int > \boost_1_53_0\boost\fusion\container\vector\detail\vector_n_chooser.hpp(65): > error C2238: unexpected token(s) preceding ';' > > Thank you for any inputs! > > Fernando >

1 0

Using boost from XCODE 4.6.1 - what are the proper build settings?
by B Hart 01 Jun '13

01 Jun '13

I downloaded boost 1.53 and extracted to Users/user/Desktop/boost_1_53_0 I built boost as static libraries following instructions at: http://libcinder.org/docs/v0.8.5/_cinder_boost.html I changed XCODE's "Build Settings" "Header Search Paths" to /Users/user/Desktop/boost_1_53_0 as well as the "Library Search Paths" to Users/user/Desktop/boost_1_53_0/stage/lib Then I build and get errors: The first error I'm getting is "has_binary_operator.hpp" Parse issue Expected member name or ';' after declaration specifiers at the line: template < typename Lhs, typename Rhs > struct operator_exists { ... Does anyone have tips for what the build settings should be? The project contains some files that are cocoa/objective C (.m) and others that are C++(.mm) using boost. I'm completely new to trying to use boost under OSX mountain lion and XCODE 4.6.1.

2 1

[mpl] Using max_element inside a fold while constructing a vector
by Brendon Costa 01 Jun '13

01 Jun '13

Hi, I have been using boost.mpl for the first time recently and have solved a number of tasks with boost.mpl now but have a problem with a bit of code I thought should be working. What is wrong with this bit of code using boost.mpl? typedef vector<int_<0>, int_<3>, int_<2> > v1; // I want to use max_element on a vector I am in the process of constructing using a fold typedef typename fold<v1, vector<int_<0> >, push_back<_1, deref<max_element<_1>::type >::type> >::type v2; // This code below compiles and runs fine to illustrate that max_element on a vector works, but is not what I am after. // I thought _1 in the max_element above would be a vector just as v1 below is, but the one below works and the one above does not. // typedef typename fold<v1, vector<int_<0> >, push_back<_1, deref<max_element<v1>::type >::type> >::type v2; I know this code is only going to create v2 like [0, 0, 0, 0] in this case but this is a smaller part of a larger expression that is failing and I cut it down to the minimum to show the problem at hand. In case it is useful I am using gcc 4.5.3 and boost 1.50

2 4

[Thread] Can't compile package_task code with 1.54
by Szymon Gatner 01 Jun '13

01 Jun '13

Hi, I just tried to compile my 1.52- based code with 1.54 beta and run into package_task compilation issue. In 1.52 I was using BOOST_THREAD_VERSION=3 define but with 1.54 I complied with =4. Test program: #define BOOST_THREAD_VERSION 4 #include <boost/thread/future.hpp> #include <boost/function.hpp> struct MyFunc { void operator()()const {} }; int main() { boost::function<void()> f; MyFunc mf; boost::packaged_task<void()> t1(f); // error 1 boost::packaged_task<void()> t2(mf); // error 2 } error 1 being: d:\devel\boost_1_54_0_beta1\boost\thread\future.hpp(2848): error C2664: 'boost::detail::task_object<F,R>::task_object(boost::detail::task_object<F,R> &)' : cannot convert parameter 1 from 'boost::function<Signature>' to 'boost::detail::task_object<F,R> &' and error 2 similarly: d:\devel\boost_1_54_0_beta1\boost\thread\future.hpp(2848): error C2664: 'boost::detail::task_object<F,R>::task_object(boost::detail::task_object<F,R> &)' : cannot convert parameter 1 from 'MyFunc' to 'boost::detail::task_object<F,R> &' (I tried with custom functor because I thought maybe error was related to boost function) Compiling with Visual Studio 2012 Update 3 Regards, Szymon Gatner

2 10

[1.54.0] Beta Release Candidates available
by Marshall Clow 01 Jun '13

01 Jun '13

Release candidate files for 1.54.0 beta 1 are available at http://boost.cowic.de/rc/ As always, the release managers would appreciate it if you download the candidate of your choice and give building it a try. Please report both success and failure, and anything else that is noteworthy. This helps ensure the candidates build OK before we push them out to SourceForge. The files (and associated md5s) are: 31266b7dcc6f557ad839e4e87317cd6e *boost_1_54_0_beta1_rc1.tar.gz fbf7be9cbaf9ea6fb21ae73d0c17100d *boost_1_54_0_beta1_rc1.tar.bz2 7de4299ab69c941e83fe3fc46dddc15f *boost_1_54_0_beta1_rc1.zip c73e5118ff585d9f1d68542f96a0758a *boost_1_54_0_beta1_rc1.7z Thanks, --The release managers

4 5

[Xpressive] Nested patterns and sub-matches' semantic values
by Simon 30 May '13

30 May '13

Hi, For one part of a large project, I need to parse math and turn the "mathematical objects" into a C++ abstraction of them. Is it possible that a nested pattern hold semantic values within itself and can be queried for that value somehow? As if a match were a function of its sub-patterns' matches, if that makes sense... Code might speak better than my english: class math_number {...}; class math_addition {...}; class math_arglist {...}; class math_funcdef {...}; sregex integer = (s1= +_d) [ return math_number( as<int>(s1) ) ]; sregex addition = (s1= integer) >> '+' >> (s2= integer) [ return math_addition( as<math_number>(s1), as<math_number>(s2) ) ]; sregex arglist = (s1= identifier) >> *( ',' >> (s2= arglist)) [ std::vector<math_id> ids( as<math_arglist>(s2).begin(), as<math_arglist>(s2).end() ); ids.push_back(as<math_id>(s1)); return ids; ] sregex funcdef = ((s1= identifier) >> '(' >> (s2= arglist) >> ")=" >> (s3= addition)) [ return math_funcdef( as<math_id>(s1), as<math_arglist>(s2), as<math_addition>(s3) ) ]; I just want to avoid the funcdef above to be responsible for the construction of the various math_* objects the funcdef will hold (some of which will be complex to construct). And if I really must store the objects in an external stack, how should the parent-objects find their child-objects? Thanks, Simon

2 2

Confused with BGL-- Six Degrees of Kevin Bacon example
by lizy10b 30 May '13

30 May '13

Hi there, I am new to BGL library. I am walking through the online tutorial and just finished the "10.2. Six Degrees of Kevin Bacon". As it is said at the end of the example: "Note that vertex descriptor objects can not always be used as indices into vectors or arrays such as bacon_number. This is valid with the adjacency_list class with VertexList=vecS, but not with other variations of adjacency_list. A more generic way to index based on vertices is to use the ID property map (vertex_index_t) in coordination with the iterator_property_map.". So I turn to have a look at the iterator_property_map page and its sample. First, this sample uses VertexList=vecS too. Second, I know this sample is using iterator_property_map to build a property map, but I think the property is still indexed by the edge descriptor objects. So what is the difference? Thanks. Zhiyu LI 2013-05-29 lizy10b

2 5

[program options] parsing std::string
by Michael Powell 30 May '13

30 May '13

Hello, I want to parse std::string, perhaps into a vector<string>, but I do not want the command line argument to be positional in nature (i.e. like the examples demonstrate), because there may be a handful of parameters I need to capture into string or vector<string>. I've been able to parse integral types like int, even vector<int>, but haven't had much success with string. Possible or is this a program options "feature" and/or bug? Regards, Michael Powell

2 1

Does the Proactor of boost uses edge-triggered epoll on linux?
by Journeyer J. Joh 30 May '13

30 May '13

Hello list, I have some questions about boost's async IO implementation for linux. 1. Does it use edge-triggered epoll to implement the Proactor (in terms of Reactor)? http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/overview/core/asyn… The guide above says that boost's Proactor is implemented in terms of Reactor when it comes to Linux. If it is based on Reactor, I guess it should be level-triggered epoll. 2. Am I right? Then my question is 3. Does boost use edge-triggered epoll in any kind of async IO on linux? 4. Isn't edge-triggered epoll a good method to implement async IO on linux? Thank you very much. Sincerely Journeyer ---------------------------------------- Journeyer J. Joh o o s a p r o g r a m m e r a t g m a i l d o t c o m ----------------------------------------

3 5