模板繼承

Question

我有一個C++類模板和另一個繼承它的類。後者不是類模板，你會看到。當我嘗試通過調用基類的構造函數（模板之一）來定義派生類的構造函數時，會出現此問題。我在代碼下面發佈了錯誤。

爲了簡單起見，我只添加了聲明。如果您覺得代碼可能會幫助您瞭解可能出現的問題，我很樂意將其發佈。

state2d.h

#ifndef STATE2D_H 
#define STATE2D_H 

template <typename T> 
class State2D 
{ 
public: 
    State2D(unsigned int _rows, unsigned int _columns); 
    State2D(unsigned int _rows, unsigned int _columns, const T& val); 
    State2D(const State2D<T> &st); 
    ~State2D(); 
    T& operator()(unsigned int i, unsigned int j); 
    const T& operator()(unsigned int i, unsigned int j) const; 
    unsigned int GetRowCount() const; 
    unsigned int GetColumnCount() const; 
    unsigned int GetAvailablePositionsCount() const; 

protected: 
    T** matrix; 
    unsigned int rows; 
    unsigned int columns; 
    unsigned int availablePositions; 
}; 

#endif // STATE2D_H 

TicTacToeState.h

#ifndef TICTACTOESTATE_H 
#define TICTACTOESTATE_H 

#include "state2d.h" 

class TicTacToeState : public State2D<char> 
{ 
public: 
    TicTacToeState(); 
}; 

#endif // TICTACTOESTATE_H 

TicTacToeState.cpp

#include "tictactoestate.h" 

TicTacToeState::TicTacToeState() : State2D(3,3,' ') // ERROR here; see below 
{ 
} 

error: class 'TicTacToeState' does not have any field named 'State2D' error: no matching function for call to 'State2D::State2D()' candidates are: State2D::State2D(const State2D&) [with T = char] State2D::State2D(unsigned int, unsigned int, const T&) [with T = char] State2D::State2D(unsigned int, unsigned int) [with T = char]

任何想法？

Answer 1

: State2D<char>(3,3,' ') 

也許？