std::cout << "1) bind to a pointer to member function: "; Foo foo; // 这里的&foo就是为了补齐成员变量里面的默认参数this auto f3 = std::bind(&Foo::print_sum, &foo, 95, _1); f3(5); std::cout << "2) bind to a mem_fn that is a pointer to member function: "; } 执行...
std::function<bool()> fIsItemValid = [this](){inttimeOutCount =VALUE_0;do{if(m_parent && m_xAxis &&m_yAxis){returntrue; }else{++timeOutCount; QThread::msleep(TIME_OUT_MS);if(timeOutCount >= TIME_OUT_COUNT)returnfalse;continue; } }while(true); }; auto getItemState= [this](s...
std::cout << "bind to a pointer to member function:\n"; Foo foo; auto f3 = std::bind(&Foo::print_sum, &foo, 95, _1); f3(5); std::cout << "bind to a pointer to data member:\n"; auto f4 = std::bind(&Foo::data, _1); std::cout << f4(foo) << '\n'; std::...
返回值 就是一个function的对象,当调用时候调用的就是fn这个方法体和带上传递的参数 重点强调一下最后两个: If fn is a pointer to member, the first argument expected by the returned function is an object of the class *fn is a member (or a reference to it, or a pointer to it). 大概意思...
Callable object (function object, pointer to function, reference to function, pointer to member function, or pointer to data member) that will be bound to some arguments. bind函数简述: bind函数看做一个通用的函数适配器,它接受一个可调用对象callable,生成一个新的可调用对象newCallable。
boost::bind(&memberfunction, obj, _1, _2...)类似这样的用法,我们叫做成员函数绑定,boost库的文档中说的很清楚,第一个参数可以是value、pointer和reference,即传值、传地址和传引用都是可以的,所以在一般情况下,下面三种使用bind的形式都是成立的。 classA ...
boost::bind(&memberfunction, obj, _1, _2...)类似这样的用法,我们叫做成员函数绑定,boost库的文档中说的很清楚,第一个参数可以是value、pointer和reference,即传值、传地址和传引用都是可以的,所以在一般情况下,下面三种使用bind的形式都是成立的。 classA ...
static const std::size_t _M_max_size = sizeof(_Nocopy_types); union _Nocopy_types { void* _M_object; const void* _M_const_object; void (*_M_function_pointer)(); void (_Undefined_class::*_M_member_pointer)(); }; _M_max_size的大小被定义成一个union,我们知道union的大小取决...
Describes a pointer. Syntax C++ Kopiraj typedef union tagBINDPTR { FUNCDESC *lpfuncdesc; VARDESC *lpvardesc; ITypeComp *lptcomp; } BINDPTR, *LPBINDPTR; Members lpfuncdesc Pointer to a function. lpvardesc Pointer to a variable, constant, or data member. lptcomp The ITypeComp that b...
Thebindfunction associates a local address with a socket. Syntax C++Copy intbind( [in] SOCKET s,constsockaddr *addr, [in]intnamelen ); Parameters [in] s A descriptor identifying an unbound socket. addr A pointer to asockaddrstructure of the local address to assign to the bound socket . ...