#include <emscripten/bind.h>

// Bring Emscripten namespace into scope for the sake of readability
using namespace emscripten;

// Struct that is treated in JS like an array. 'returnX(Point(1,5))' => 'Module.returnX([1,5])'
// This struct is treated like an array because it is being registered as a 'value_array'
struct Point
{
    int x;
    int y;
};

int returnX(Point pt)
{
    return pt.x;
}

EMSCRIPTEN_BINDINGS(Module)
{
    value_array<Point>("Point") // <-- Register 'value_array' called 'Point'. 'value_arrays'
                                //     are structs that are treated like arrays in JS.
        .element(&Point::x)     // <-- Set 'Point::X' to be the first element
        .element(&Point::y);    // <-- Set 'Point::Y' to be the second element

    function("returnX", &returnX); // <-- Register method to return the X value of 'Point' struct
}