[Boost-users] lambda/bind trouble

From: Sebastian Weber (sebastian.weber_at_[hidden])
Date: 2006-04-20 02:41:49

Hello everybody!

I'm starting to use the boost lambda library. My first steps with it
were quite amazing, but now I'm comming to some more advanced problems
and I don't see my fault. The code in question is

      std::for_each(vertices(bg).first,
                    vertices(bg).second,
                    bind(ll::fill_n(),   // line 197, supposenly wrong
                         std::back_inserter(vs),
                         bind(out_degree, _1, bg),
                         _1));

which does not compile with the error message:

box_cover.hpp: In function `size_t boost::box_cover(Graph&,
RandomGenerator&,
   BoxMap, unsigned int, unsigned int)':
box_cover.hpp:197: error: parse error before `::' token

    "g++-3.3"   -Wall -ftemplate-depth-100 -msse2 -mfpmath=sse,387 -O3
-finline-functions -Wno-inline-fPIC -msse2 -mfpmath=sse,387
-DBOOST_DATE_TIME_DYN_LINK=1 -DDATE_TIME_INLINE -DNDEBUG  -I"."
-I"/home/sebi/projects/diplom/src/boost_1_33_1"  -c -o
"../../bin/graph/gcc-3.3/release/boxTest.o"  "boxTest.cpp"

I thought, I could realize this stuff with the boost::bind library as
well and tried the construct

      std::for_each(vertices(bg).first,
                    vertices(bg).second,
                    boost::bind(std::fill_n,
                                std::back_inserter(vs),
                                boost::bind(boost::out_degree, _1, bg), _1) );

which does not compile as well:

box_cover.hpp: In function `size_t boost::box_cover(Graph&,
RandomGenerator&,
   BoxMap, unsigned int, unsigned int) [with Graph = main(int,
   char**)::graph_t, RandomGenerator = base_rand_gen_t, BoxMap =
size_t*]':
boxTest.cpp:140:   instantiated from here
box_cover.hpp:202: error: no matching function for call to
`bind(<unknown
   type>, boost::arg<1>&, boost::adjacency_list<boost::vecS,
boost::vecS,
   boost::undirectedS, boost::no_property, boost::no_property,
   boost::no_property, boost::listS>&)'

    "g++-3.3"   -Wall -ftemplate-depth-100 -msse2 -mfpmath=sse,387 -O3
-finline-functions -Wno-inline-fPIC -msse2 -mfpmath=sse,387
-DBOOST_DATE_TIME_DYN_LINK=1 -DDATE_TIME_INLINE -DNDEBUG  -I"."
-I"/home/sebi/projects/diplom/src/boost_1_33_1"  -c -o
"../../bin/graph/gcc-3.3/release/boxTest.o"  "boxTest.cpp"

Any help would be greatly appreciated. Thanks a lot!

Almost forgot: My Boost version is 1.33.1 and the compiler I use is g++
3.3.5 from Debian sarge.

Greetings,

Sebastian