#include <metal_stdlib>

using namespace metal;

template<typename T, size_t N>
struct tint_array {
    const constant T& operator[](size_t i) const constant { return elements[i]; }
    device T& operator[](size_t i) device { return elements[i]; }
    const device T& operator[](size_t i) const device { return elements[i]; }
    thread T& operator[](size_t i) thread { return elements[i]; }
    const thread T& operator[](size_t i) const thread { return elements[i]; }
    threadgroup T& operator[](size_t i) threadgroup { return elements[i]; }
    const threadgroup T& operator[](size_t i) const threadgroup { return elements[i]; }
    T elements[N];
};

struct S {
  /* 0x0000 */ packed_int3 v;
  /* 0x000c */ tint_array<int8_t, 4> tint_pad;
};

void f(device S* const tint_symbol) {
  (*(tint_symbol)).v = int3(1, 2, 3);
  (*(tint_symbol)).v[0] = 1;
  (*(tint_symbol)).v[1] = 2;
  (*(tint_symbol)).v[2] = 3;
}