#include <nickel/nickel.hpp>

// Declare the names
NICKEL_NAME(width_name, width);
NICKEL_NAME(height_name, height);

// Declare the function
auto rectangle_area() {
    return nickel::wrap(width_name, height_name)([](int width, int height) {
        // The actual definition of the function
        return width * height;
    });
}

int foo() {
    // Call the function
    return rectangle_area()
        .width(42)      // Bind named arguments
        .height(35)();  // Bind `height`, then perform the actual call
    // Returns 42 * 35 = 1470
}