应用SFINAE模式与通用参考

我有以下代码:

#include <utility>
#include <iostream>
#include <queue>
#include <functional>
#include <stdio.h>
#include <future>

class Runner {
public:
    virtual void run() = 0;
    virtual ~Runner() {
    }
};

class Command: public Runner {
public:
    Command() {
        std::cout << "constructor" << std::endl;
    }
    virtual void run() {
    }
};

#define EXTEND(T, F) , typename = typename std::enable_if<std::is_base_of<F, typename std::decay<T>::type>::value, typename std::decay<T>::type>::type
#define NOT_EXTEND(T, F) , typename = typename std::enable_if<!std::is_base_of<F, typename std::decay<T>::type>::value, typename std::decay<T>::type>::type

class Executor {
private:
    std::queue<std::function<void(void)> > q;
public:
    template<class T EXTEND(T, Runner)>
    void push(T&& toBepushed) {
        q.push(
                std::bind(&std::decay<T>::type::run,
                        std::forward<T>(toBepushed)));
    }
    template<typename T NOT_EXTEND(T, Runner)>
    void push(T&& toBepushed) {
        q.push(std::forward<T>(toBepushed));
    }
    void perform() {
        std::function<void(void)>&& f = std::move(q.front());
        f();
    }
};

int main() {
    Executor b;
    Command c;
    b.push(c);
    b.perform();
    return 0;
}

g++-std=c++0x-O2-g3-Wall-c-fmessage length=0-MMD-MP -MF“main.d”-MT“main.o”-o“main.o”“../main.cpp”。/main.cpp:45:7:错误:模板无效条::推送(T&&)不可能 超负荷空推(T&&(被推挤){ ^~~~../main.cpp:39:7:错误:使用模板无效栏::推送(T&&)无效推力(T&&(被推挤){ ^~~~生成:**[subdir.mk:20:main.o]错误1

我正在尝试应用SFINAE,以便根据所使用的类型应用push方法。如何解决?