lambda.cpp
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	#include <iostream>

	void foo1() { std::cout << "Hey" << std::endl; }

	int main() {

	// call a standard function
	foo1();

	auto foo2 = []() { std::cout << "Hey again !" << std::endl; };

	foo2();

	auto foo3 = [](int a, double b) { std::cout << a << "," << b << std::endl; };

	foo3(10, 102.3);

	int toto = 2;
	// captures 'toto' variable
	auto foo4 = [toto]() { std::cout << toto << std::endl; };

	foo4();

	// captures all in current scope
	auto foo5 = [&]() { std::cout << toto << std::endl; };

	foo5();

	// explicit declaration
	auto foo6 = []() -> int { return 19; };
	auto res = foo6();

	// implicit declaration
	auto foo7 = []() { return 19.3; };
	auto res2 = foo7();
	}