以下代码收到编译错误：
const D_Value_BufRef_Vec& values = records.at(record_type);
// return begin/end zip iterators for traversing field:value list.
return std::make_pair(
boost::make_zip_iterator(
boost::make_tuple(fields.begin(),
values.begin())
),
boost::make_zip_iterator(
boost::make_tuple(fields.end(),
values.end())
)
); // <-- Line 752
字段是std::vector<string>。 值为std::vector<MemRef>。以前，值是std::vector<string>并且编译正常。 MemRef是替换string的自定义类。
错误是：
In file included from /usr/include/boost/tuple/tuple.hpp:33,
from /mxhome/charrison/git/sdcore/libs/CommUtils/include/Block.h:20,
from ./c/Block.cpp:1:
/usr/include/boost/tuple/detail/tuple_basic.hpp: In constructor 'boost::tuples::cons<HT, boost::tuples::null_type>::cons(const boost::tuples::cons<HT2, boost::tuples::null_type>&) [with HT2 = __gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, HT = __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >]':
/usr/include/boost/tuple/detail/tuple_basic.hpp:373: instantiated from 'boost::tuples::cons<HT, TT>::cons(const boost::tuples::cons<HT2, TT2>&) [with HT2 = __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, TT2 = boost::tuples::cons<__gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type>, HT = __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, TT = boost::tuples::cons<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::tuples::null_type>]'
/usr/include/boost/tuple/detail/tuple_basic.hpp:635: instantiated from 'boost::tuples::tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::tuple(const boost::tuples::cons<HT2, TT2>&) [with U1 = __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, U2 = boost::tuples::cons<__gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type>, T0 = __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, T1 = __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, T2 = boost::tuples::null_type, T3 = boost::tuples::null_type, T4 = boost::tuples::null_type, T5 = boost::tuples::null_type, T6 = boost::tuples::null_type, T7 = boost::tuples::null_type, T8 = boost::tuples::null_type, T9 = boost::tuples::null_type]'
/usr/include/boost/iterator/zip_iterator.hpp:488: instantiated from 'boost::zip_iterator<IteratorTuple>::zip_iterator(const boost::zip_iterator<OtherIteratorTuple>&, typename boost::enable_if_convertible<OtherIterator, Iterator>::type*) [with OtherIteratorTuple = boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>, IteratorTuple = boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]'
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_pair.h:107: instantiated from 'std::pair<_T1, _T2>::pair(std::pair<_U1, _U2>&&) [with _U1 = boost::zip_iterator<boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >, _U2 = boost::zip_iterator<boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >, _T1 = boost::zip_iterator<boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >, _T2 = boost::zip_iterator<boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >]'
./c/Block.cpp:752: instantiated from here
/usr/include/boost/tuple/detail/tuple_basic.hpp:451: error: no matching function for call to '__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::__normal_iterator(const __gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >&)'
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_iterator.h:686: note: candidates are: __gnu_cxx::__normal_iterator<_Iterator, _Container>::__normal_iterator(const _Iterator&) [with _Iterator = std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, _Container = std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >]
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_iterator.h:683: note: __gnu_cxx::__normal_iterator<_Iterator, _Container>::__normal_iterator() [with _Iterator = std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, _Container = std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >]
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_iterator.h:669: note: __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::__normal_iterator(const __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&)
偶尔出现“iterator”这个词，我想知道编译器是否不知道如何处理values.begin()或.end()。如果这是问题，我不明白为什么计算std::vector<string>.end()与计算std::vector<MemRef>.end()有任何不同。如果迭代器是一个抽象指针，只需要是可解除引用和可递增的，那么需要了解存储在std::vector中的特定内容需要多少？
另一方面，该错误消息可能比我看到的更多： - /
更新1： @ MikeSeymour的建议我发现封闭函数被声明为返回
std::pair< boost::zip_iterator<
boost::tuple<
std::vector<string>::iterator,
std::vector<string>::iterator > // should be vector<MemRef> !!
> ,
boost::tuple<
std::vector<string>::iterator,
std::vector<string>::iterator > // should be vector<MemRef> !!
>
>
如上所述纠正向量后，我仍然收到错误：
In file included from /usr/include/boost/tuple/tuple.hpp:33,
from /mxhome/charrison/git/sdcore/libs/CommUtils/include/Block.h:20,
from ./c/Block.cpp:1:
/usr/include/boost/tuple/detail/tuple_basic.hpp: In constructor 'boost::tuples::cons<HT, boost::tuples::null_type>::cons(const boost::tuples::cons<HT2, boost::tuples::null_type>&) [with HT2 = __gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, HT = __gnu_cxx::__normal_iterator<MemRef*, std::vector<MemRef, std::allocator<MemRef> > >]':
/usr/include/boost/tuple/detail/tuple_basic.hpp:373: instantiated from 'boost::tuples::cons<HT, TT>::cons(const boost::tuples::cons<HT2, TT2>&) [with HT2 = __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, TT2 = boost::tuples::cons<__gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type>, HT = __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, TT = boost::tuples::cons<__gnu_cxx::__normal_iterator<MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type>]'
/usr/include/boost/tuple/detail/tuple_basic.hpp:635: instantiated from 'boost::tuples::tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::tuple(const boost::tuples::cons<HT2, TT2>&) [with U1 = __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, U2 = boost::tuples::cons<__gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type>, T0 = __gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, T1 = __gnu_cxx::__normal_iterator<MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, T2 = boost::tuples::null_type, T3 = boost::tuples::null_type, T4 = boost::tuples::null_type, T5 = boost::tuples::null_type, T6 = boost::tuples::null_type, T7 = boost::tuples::null_type, T8 = boost::tuples::null_type, T9 = boost::tuples::null_type]'
/usr/include/boost/iterator/zip_iterator.hpp:488: instantiated from 'boost::zip_iterator<IteratorTuple>::zip_iterator(const boost::zip_iterator<OtherIteratorTuple>&, typename boost::enable_if_convertible<OtherIterator, Iterator>::type*) [with OtherIteratorTuple = boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>, IteratorTuple = boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]'
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_pair.h:107: instantiated from 'std::pair<_T1, _T2>::pair(std::pair<_U1, _U2>&&) [with _U1 = boost::zip_iterator<boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >, _U2 = boost::zip_iterator<boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >, _T1 = boost::zip_iterator<boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >, _T2 = boost::zip_iterator<boost::tuples::tuple<__gnu_cxx::__normal_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, __gnu_cxx::__normal_iterator<MemRef*, std::vector<MemRef, std::allocator<MemRef> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >]'
./c/Block.cpp:752: instantiated from here
/usr/include/boost/tuple/detail/tuple_basic.hpp:451: error: no matching function for call to '__gnu_cxx::__normal_iterator<MemRef*, std::vector<MemRef, std::allocator<MemRef> > >::__normal_iterator(const __gnu_cxx::__normal_iterator<const MemRef*, std::vector<MemRef, std::allocator<MemRef> > >&)'
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_iterator.h:686: note: candidates are: __gnu_cxx::__normal_iterator<_Iterator, _Container>::__normal_iterator(const _Iterator&) [with _Iterator = MemRef*, _Container = std::vector<MemRef, std::allocator<MemRef> >]
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_iterator.h:683: note: __gnu_cxx::__normal_iterator<_Iterator, _Container>::__normal_iterator() [with _Iterator = MemRef*, _Container = std::vector<MemRef, std::allocator<MemRef> >]
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_iterator.h:669: note: __gnu_cxx::__normal_iterator<MemRef*, std::vector<MemRef, std::allocator<MemRef> > >::__normal_iterator(const __gnu_cxx::__normal_iterator<MemRef*, std::vector<MemRef, std::allocator<MemRef> > >&)