我有以下代码(尽可能简化):
#include <vector>
#include <algorithm>
using std::vector;
enum class Foo {
BAR, BAZ
};
void print_to_file(const vector<const vector<Foo> >& sequences) {
std::for_each(sequences.begin(), sequences.end(), [](const vector<Foo>& sequence) {
});
}
int main(int argc, char **argv) {
return EXIT_SUCCESS;
}
编译时g++ (SUSE Linux) 4.7.1 20120723 [gcc-4_7-branch revision 189773]
出现g++ --std=c++11 test.cpp
以下错误消息:
In file included from /usr/include/c++/4.7/x86_64-suse-linux/bits/c++allocator.h:34:0,
from /usr/include/c++/4.7/bits/allocator.h:48,
from /usr/include/c++/4.7/vector:62,
from test.cpp:1:
/usr/include/c++/4.7/ext/new_allocator.h: In instantiation of ‘struct __gnu_cxx::new_allocator<const std::vector<Foo> >’:
/usr/include/c++/4.7/bits/allocator.h:89:11: required from ‘class std::allocator<const std::vector<Foo> >’
/usr/include/c++/4.7/bits/alloc_traits.h:89:43: required from ‘struct std::allocator_traits<std::allocator<const std::vector<Foo> > >’
/usr/include/c++/4.7/ext/alloc_traits.h:109:10: required from ‘struct __gnu_cxx::__alloc_traits<std::allocator<const std::vector<Foo> > >’
/usr/include/c++/4.7/bits/stl_vector.h:76:28: required from ‘struct std::_Vector_base<const std::vector<Foo>, std::allocator<const std::vector<Foo> > >’
/usr/include/c++/4.7/bits/stl_vector.h:208:11: required from ‘class std::vector<const std::vector<Foo> >’
test.cpp:11:25: required from here
/usr/include/c++/4.7/ext/new_allocator.h:83:7: error: ‘const _Tp* __gnu_cxx::new_allocator<_Tp>::address(__gnu_cxx::new_allocator<_Tp>::const_reference) const [with _Tp = const std::vector<Foo>; __gnu_cxx::new_allocator<_Tp>::const_pointer = const std::vector<Foo>*; __gnu_cxx::new_allocator<_Tp>::const_reference = const std::vector<Foo>&]’ cannot be overloaded
/usr/include/c++/4.7/ext/new_allocator.h:79:7: error: with ‘_Tp* __gnu_cxx::new_allocator<_Tp>::address(__gnu_cxx::new_allocator<_Tp>::reference) const [with _Tp = const std::vector<Foo>; __gnu_cxx::new_allocator<_Tp>::pointer = const std::vector<Foo>*; __gnu_cxx::new_allocator<_Tp>::reference = const std::vector<Foo>&]’
相同的代码在 VS2012 上编译得很好,但在 g++ 下严重失败,我一点也不知道如何解释错误消息。