Welcome!

The C++ Apply library is a King Mamphreh project to extend functionality of function std::apply to enable to work with std::vector, std::list, std::set, ...

Synopsis

#include <xt/apply.h>

#include <iostream>
#include <sstream>

const auto sum3 = [](int a, int b, int c) { return a + b + c; };

int main() {
    do {
        std::cout << "Enter three numbers: ";
        try {
            std::ostringstream os;
            os << "Result: " << xt::apply_i(sum3, std::istream_iterator<int>(std::cin));

            std::cout << os.str() << std::endl;
        } catch (std::exception& e) {
            std::cout << e.what() << std::endl;
        }
    } while(true);

    return 0;
}

#include <xt/apply.h>

#include <functional>
#include <any>
#include <vector>
#include <list>
#include <set>
#include <iostream>

using namespace std;

int sum3(int a, int b, int c) {
    return a + b + c;
}

int no_args() {
    return rand();
}

int sum(int a, int b) {
    return a + b;
}

float sum_i_f(int a, float b) {
    return a + b;
}

class Prod {
public:
    int operator()(int a, int b) {
        return a * b;
    }
};

int main() {

    vector<int> v{9, 12, 2};
    list<int> l{ 7, 5 };
    set<int> s = { 7, 5 };
    list<any> ll = { 1, 1.5f };
    list<int> l1 = {19};

    cout << xt::apply(&sum3, v) << endl; // Output: 23

    cout << xt::apply(no_args, {}) << endl;

    cout << xt::apply(&sum, l) << endl; // 12

    cout << xt::apply(sum, l) << endl; // 12

    cout << xt::apply(&sum, s) << endl; // 12

    cout << xt::apply(&sum_i_f, ll) << endl; // 2.5

    cout << xt::apply([](int a, int b) { return a + b; }, l) << endl; // 12

    cout << xt::apply(Prod(), {4, 5}) << endl;  // 20


    using namespace placeholders;

    function<int(int)> sum4 = bind(sum, 4, _1);

    cout << xt::apply(sum4, l1) << endl; // 23

    auto sum5 = [](int a) { return sum(5, a); };

    cout << xt::apply(sum5, l1) << endl; // 24

    cout << xt::apply(&sum, {1, 3}) << endl; // 4

    return 0;
}

License

Copyright (c) King Mampreh. All rights reserved.

Licensed under the MIT License.