This small C++11 library provides some additional functionality using tuples: iterate through all elements in a tuple and apply a function(functor) to those elements, unpack tuple at the compile time and apply tupe elements to a function as an arguments.
#include <iostream>
#include "unpack_tuple.hpp"
// -------- Free functions ------
void one(int i, double d)
{
std::cout << "function one(" << i << ", " << d << ");\n";
}
int two(int i)
{
std::cout << "function two(" << i << ");\n";
return i;
}
int main()
{
std::tuple<int, double> tup(23, 4.5);
// unpack tuple and apply to the function
tuple11::apply(one, tup);
int d = tuple11::apply(two, std::make_tuple(2));
return 0;
}#include <iostream>
#include "for_each.hpp"
// -------------- Example classes ------
struct Foo {
void doSomething() const { std::cout << "Foo" << std::endl; }
};
struct Bar{
void doSomething() const { std::cout << "Bar" << std::endl; }
};
struct Beer{
void doSomething() const { std::cout <<"Beer" << std::endl; }
};
// ---------- FUNCTOR ----------
struct Functor
{
template<typename T>
void operator()(T& t) const { t.doSomething(); }
};
int main()
{
// iterate through the tuple elements.
std::tuple<Foo, Bar, Beer> foobarbeer = std::make_tuple(Foo(), Bar(), Beer());
tuple11::for_each(foobarbeer, Functor() );
return 0;
}BSD
The library is header only. Some tests are provided in 'test' directory. Tested with compilers g++ and clang++:
g++ test_for_each.cpp -std=c++11 -I../ where library header files exist.