SPIRV-Cross/reference/opt/shaders-msl/comp/struct-layout.comp

#pragma clang diagnostic ignored "-Wmissing-braces"
#pragma clang diagnostic ignored "-Wunused-variable"

#include <metal_stdlib>
#include <simd/simd.h>
	
template <typename T, size_t Num>
struct unsafe_array
{
	T __Elements[Num ? Num : 1];
	
	constexpr size_t size() const thread { return Num; }
	constexpr size_t max_size() const thread { return Num; }
	constexpr bool empty() const thread { return Num == 0; }
	
	constexpr size_t size() const device { return Num; }
	constexpr size_t max_size() const device { return Num; }
	constexpr bool empty() const device { return Num == 0; }
	
	constexpr size_t size() const constant { return Num; }
	constexpr size_t max_size() const constant { return Num; }
	constexpr bool empty() const constant { return Num == 0; }
	
	constexpr size_t size() const threadgroup { return Num; }
	constexpr size_t max_size() const threadgroup { return Num; }
	constexpr bool empty() const threadgroup { return Num == 0; }
	
	thread T &operator[](size_t pos) thread
	{
		return __Elements[pos];
	}
	constexpr const thread T &operator[](size_t pos) const thread
	{
		return __Elements[pos];
	}
	
	device T &operator[](size_t pos) device
	{
		return __Elements[pos];
	}
	constexpr const device T &operator[](size_t pos) const device
	{
		return __Elements[pos];
	}
	
	constexpr const constant T &operator[](size_t pos) const constant
	{
		return __Elements[pos];
	}
	
	threadgroup T &operator[](size_t pos) threadgroup
	{
		return __Elements[pos];
	}
	constexpr const threadgroup T &operator[](size_t pos) const threadgroup
	{
		return __Elements[pos];
	}
};

using namespace metal;

struct Foo
{
    float4x4 m;
};

struct SSBO2
{
    unsafe_array<Foo,1> out_data;
};

struct SSBO
{
    unsafe_array<Foo,1> in_data;
};

kernel void main0(device SSBO2& _23 [[buffer(0)]], const device SSBO& _30 [[buffer(1)]], uint3 gl_GlobalInvocationID [[thread_position_in_grid]])
{
    _23.out_data[gl_GlobalInvocationID.x].m = _30.in_data[gl_GlobalInvocationID.x].m * _30.in_data[gl_GlobalInvocationID.x].m;
}