"DY, JERRY U (SBCSI)" <jd2419@sbc.com> writes:
In trying to compile the filesystem library, I'm getting an error that the compiler cannot find the operator== for the following function:
bool is_empty_directory( const fs::path & dir_path ) { return fs::directory_iterator(dir_path) == end_itr; }
aCC-C++-action ../../../bin/boost/libs/filesystem/build/libboost_filesystem.a/acc/debug /operations_posix_windows.o Error 226: "../../../libs/filesystem/build/../src/operations_posix_windows.cpp", line 176 # No appropriate function found for call of 'operator =='.
class directory_iterator doesn't declare it, neither do ancestors iterator_facade and iterator_facade_types. Can't find free function for operator==(directory_iterator&, directory_iterator&), operator==(iterator_facade&, iterator_facade&), operator==(iterator_facade_types&, iterator_facade_types&) or any of its variants. Is it using the default compiler-generated operator== in directory_iterator?
The compiler is wrong. There is an operator== that takes two iterator_facade specializations in iterator_facade.hpp, generated by this line: BOOST_ITERATOR_FACADE_RELATION(==, return, equal) Try preprocessing the source if you need to see it. -- Dave Abrahams Boost Consulting http://www.boost-consulting.com