[英]C++ template not compiling on Linux GCC
我有一段代碼可以在Microsoft Visual Studio上編譯,但不能在Linux Eclipse GCC上編譯。
這是代碼:
template <class KEY, class BASEMAP>
class CGenericKeyToPointerMap : public std::map<KEY, BASEMAP>
{
private:
iterator tmpSearchIterator;
};
編譯輸出是:
Invoking: GCC C++ Compiler
g++ -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"src/test.d" -MT"src/test.o" -o "src/test.o" "../src/test.cpp"
../src/test.cpp:22:2: error: invalid use of template-name ‘std::iterator’ without an argument list
iterator tmpSearchIterator;
^~~~~~~~
../src/test.cpp:22:2: note: class template argument deduction is only available with -std=c++17 or -std=gnu++17
In file included from /usr/include/c++/8/bits/stl_algobase.h:65,
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 ../src/test.cpp:9:
/usr/include/c++/8/bits/stl_iterator_base_types.h:118:12: note: ‘template<class _Category, class _Tp, class _Distance, class _Pointer, class _Reference> struct std::iterator’ declared here
struct iterator
避免使用的另一個原因
using namespace std;
我猜你想std::map<KEY, BASEMAP>::iterator
使用std::map<KEY, BASEMAP>::iterator
而不是std::iterator
iterator tmpSearchIterator;
在那種情況下,使用
using iterator = typename std::map<KEY, BASEMAP>::iterator;
iterator tmpSearchIterator;
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