I have a bit of code (which I didn't write, but am trying to compile) -- iostream_combo.cc--, and doing so gives me the following error:
./moses/moses/comboreduct/combo/iostream_combo.cc: In function ‘std::__cxx11::string opencog::combo::l2ph(const string&, const std::vector<std::__cxx11::basic_string<char> >&)’: ./moses/moses/comboreduct/combo/iostream_combo.cc:543:64: error: call of overloaded ‘distance(std::vector<std::__cxx11::basic_string<char> >::const_iterator, __gnu_cxx::__normal_iterator<const std::__cxx11::basic_string<char>*, std::vector<std::__cxx11::basic_string<char> > >&)’ is ambiguous arity_t idx = distance(labels.begin(), found_it) + 1; ^ In file included from /usr/include/c++/8/bits/stl_algobase.h:66, from /usr/include/c++/8/bits/char_traits.h:39, from /usr/include/c++/8/ios:40, from /usr/include/c++/8/ostream:38, from /usr/include/c++/8/iostream:39, from ./moses/moses/comboreduct/combo/iostream_combo.h:28, from ./moses/moses/comboreduct/combo/iostream_combo.cc:24: /usr/include/c++/8/bits/stl_iterator_base_funcs.h:138:5: note: candidate: ‘typename std::iterator_traits<_Iterator>::difference_type std::distance(_InputIterator, _InputIterator) [with _InputIterator = __gnu_cxx::__normal_iterator<const std::__cxx11::basic_string<char>*, std::vector<std::__cxx11::basic_string<char> > >; typename std::iterator_traits<_Iterator>::difference_type = long int]’ distance(_InputIterator __first, _InputIterator __last) ^~~~~~~~ In file included from /usr/local/include/boost/range/distance.hpp:18, from /usr/local/include/boost/range/functions.hpp:21, from /usr/local/include/boost/range/iterator_range_core.hpp:38, from /usr/local/include/boost/lexical_cast.hpp:30, from ./moses/moses/comboreduct/combo/iostream_combo.h:30, from ./moses/moses/comboreduct/combo/iostream_combo.cc:24: /usr/local/include/boost/iterator/distance.hpp:49:9: note: candidate: ‘constexpr typename boost::iterators::iterator_difference<Iterator>::type boost::iterators::distance_adl_barrier::distance(SinglePassIterator, SinglePassIterator) [with SinglePassIterator = __gnu_cxx::__normal_iterator<const std::__cxx11::basic_string<char>*, std::vector<std::__cxx11::basic_string<char> > >; typename boost::iterators::iterator_difference<Iterator>::type = long int]’ distance(SinglePassIterator first, SinglePassIterator last) ^~~~~~~~
I'm using Ubuntu 16.04 x64, Boost 1.68 and gcc 8.2. So, the steps to reproduce the problem would be as follows:
- On Ubuntu 16.04
- install
gcc-8
- Use it to build boost 1.68 from source
- Git clone the moses repository sand follow the instructions from there: basically 1) git clone and build
cogutil
; 2) try to makemoses
:cd build
,cmake ..
,make
.
I understand C++ enough (I think) that I can see that the call to std::distance
is overloaded. What I don't see is the way to disambiguate it, although I guess it must include some re-writing of found_it
or some explicit castings instead of auto
.