定义:
#include <functional>
std::function<void(const QString&)> myPrintFunction;
函数指针
void directPrint(const QString &msg)
{
qDebug()<<"direct print:"<<msg;
}
myPrintFunction = directPrint;
lambda
myPrintFunction = [](const QString &s)
{
qDebug()<<"lambda print:"<<s;
};
std::bind
Screen* screen = new Screen();
PrintFunction=
std::bind(&Screen::print, screen, std::placeholders::_1);
std::function赋值的几种方法,布布扣,bubuko.com
原文地址:http://www.cnblogs.com/danju/p/3777439.html