c++ bind what are placeholders
// C++ code to demonstrate bind() and // placeholders #include <iostream> #include <functional> // for bind() using namespace std; // for placeholders using namespace std::placeholders; // Driver function to demonstrate bind() void func(int a, int b, int c) { cout << (a - b - c) << endl; } int main() { // for placeholders using namespace std::placeholders; // Use of bind() to bind the function // _1 is for first parameter and assigned // to 'a' in above declaration. // 2 is assigned to b // 3 is assigned to c auto fn1 = bind(func, _1, 2, 3); // 2 is assigned to a. // _1 is for first parameter and assigned // to 'b' in above declaration. // 3 is assigned to c. auto fn2 = bind(func, 2, _1, 3); // calling of modified functions fn1(10); fn2(10); return 0; }
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