C++
x
26
1
2
3
template <class T> class MyVector {4
private:5
std::vector<T> m_vector;6
public:7
void add(T value) {8
m_vector.push_back(value);9
}10
std::vector<T>::iterator begin() { // <==== エラー！！11
return m_vector.begin();12
}13
std::vector<T>::iterator end() { // <==== エラー！！14
return m_vector.end();15
}16
};17
18
int main() {19
MyVector<int> values;20
values.add(1);21
values.add(2);22
for (auto it=values.begin(); it!=values.end(); it++) {23
// 反復24
}25
return 0;26
}$ g++ prog.cc -Wall -Wextra -std=c++11 -pedantic
Start
prog.cc:10:3: error: need 'typename' before 'std::vector<T>::iterator' because 'std::vector<T>' is a dependent scope
10 | std::vector<T>::iterator begin() { // <==== エラー！！
| ^~~
| typename
prog.cc:13:3: error: need 'typename' before 'std::vector<T>::iterator' because 'std::vector<T>' is a dependent scope
13 | std::vector<T>::iterator end() { // <==== エラー！！
| ^~~
| typename
prog.cc: In function 'int main()':
prog.cc:22:23: error: 'class MyVector<int>' has no member named 'begin'
22 | for (auto it=values.begin(); it!=values.end(); it++) {
| ^~~~~
prog.cc:22:43: error: 'class MyVector<int>' has no member named 'end'
22 | for (auto it=values.begin(); it!=values.end(); it++) {
| ^~~
1
Finish