test/expressions/swizzle/write/vec3/f32.wgsl

struct S {
    v: vec3<f32>;
};

var<private> P : S;

fn f() {
    P.v = vec3<f32>(1.0, 2.0, 3.0);

    P.v.x = 1.0;
    P.v.y = 2.0;
    P.v.z = 3.0;
}