我一直在试图定义一个使用在类命名空间中声明的返回类型的类方法:C++“......没有指定类型”
template<class T, int SIZE>
class SomeList{
public:
class SomeListIterator{
//...
};
using iterator = SomeListIterator;
iterator begin() const;
};
template<class T, int SIZE>
iterator SomeList<T,SIZE>::begin() const {
//...
}
当我尝试编译代码,我得到这个错误:
Building file: ../SomeList.cpp
Invoking: GCC C++ Compiler
g++ -std=c++0x -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"SomeList.d" -MT"SomeList.d" -o "SomeList.o" "../SomeList.cpp"
../SomeList.cpp:17:1: error: ‘iterator’ does not name a type
iterator SomeList<T,SIZE>::begin() const {
^
make: *** [SomeList.o] Error 1
我也试过这样定义的方法:
template<class T, int SIZE>
SomeList::iterator SomeList<T,SIZE>::begin() const {
//...
}
这:
template<class T, int SIZE>
SomeList<T,SIZE>::iterator SomeList<T,SIZE>::begin() const {
//...
}
结果:
Building file: ../SomeList.cpp
Invoking: GCC C++ Compiler
g++ -std=c++0x -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"SomeList.d" -MT"SomeList.d" -o "SomeList.o" "../SomeList.cpp"
../SomeList.cpp:17:1: error: invalid use of template-name ‘SomeList’ without an argument list
SomeList::iterator SomeList<T,SIZE>::begin() const {
^
make: *** [SomeList.o] Error 1
我在做什么错?
'SomeList :: iterator SomeList :: begin()const {' –
Lol4t0