Header Only C++ implicit lambda overload struct. Use with std::visit and std::variant
as if it was type safe switch-case.
This struct is designed specifically to be used in conjunction with std::variand and
std::visit like the example below. Note that std::visit prefers to use const references.
int main(int argc, char** argv) {
std::variant<int,float,bool> example_variable = 3;
std::visit(overload(
[](const int& i){ std::cout << i << " integer" << std::endl; },
[](const float& f){ std::cout << f << " float" << std::endl; },
[](const bool& b){ std::cout << std::boolalpha << b << " bool" << std::endl; }
), example_variable);
return 0;
}If you don't want to define all of your type cases, you can even use the universal reference, like below. However BE AWARE! The universal reference will overrule other overloads defined after it, so make sure to put the universal reference overload as the last overload.
int main(int argc, char** argv) {
std::variant<int,float,bool> example_variable = 3;
std::visit(overload(
[](auto&& v){ std::cout << v << std::endl; }
), example_variable);
return 0;
}
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