const std = @import("std");
const writer = std.io.getStdOut().writer();
const expect = std.testing.expect;

fn Vec3(comptime T: type) type {
    return struct {
        const Self = @This();
        x: T,
        y: T,
        z: T,
        fn init(this: *Self, x: T, y: T, z: T) void {
            this.x = x;
            this.y = y;
            this.z = z;
        }
        
        fn print(this: Self) !void {
            try writer.print("X: {d}\nY: {d}\nZ: {d}\n", .{this.x, this.y, this.z});
        }
        
        fn add(this: *Self, other: Self) void {
            this.x = this.x + other.x;
            this.y = this.y + other.y;
            this.z = this.z + other.z;
        } 
    };
}

pub fn main() !void {
    var vec1: Vec3(u64) = undefined;
    var vec2: Vec3(u64) = undefined;
    vec1.init(2, 4, 3);
    vec2.init(1, 1, 1);
    try vec1.print();
    vec1.add(vec2);
    try vec1.print();
}