macro_rules! vec3 { ($x: expr, $y: expr, $z: expr) => { ... }; }
use gfxmath_vec3::{Vec3, vec3}; let v = vec3!(1.0, 2.0, 3.0); assert_eq!(1.0, v.x); assert_eq!(2.0, v.y); assert_eq!(3.0, v.z);