HLSL: Struct/class members

[xen2]

Didn't see this mentionned in #362:

• Struct members are not supported (such as Test.T1() in the next example)
• Optional: class keyword doesn't work (I think class and struct are the same thing?)

struct Test
{
    float4 T;
    float4 T1(float4 a)
    {
        return T + a;
    }
};

float4 PSMain() : SV_Target0 {
   Test test;
   test.T = 3.0f;
   return test.T1(5.0f);
}

ERROR: test.frag:4: ',' : Expected
ERROR: test.frag:4: 'struct member declarations' : Expected
test.frag(4): error at column 14, HLSL parsing failed.

[johnkslang]

Agreed these are not supported, will add to the list, thank you.

[johnkslang]

Issue #362 now points to this one.

[johnkslang]

Basic functionality like this is generating correct-looking SPIR-V, so I think this is done, minus having more specific detail on what's not working that needs to work. If you can help test, that would be great, thanks.

[johnkslang]

@gwihlidal the following appears to work:

struct type1
{
    void setmem(float4 m) { memVar = m; }
    void seti(int si) { i = si; }
    float4 memVar;
    float4 memFun(float4 a) : SV_Position
    {
        return i * a + memVar;
    }
    int memFun(int a) : SV_Position
    {
        return i + a - memVar.z;
    }
    int i;
};

static float2 j = i;

struct type2
{
    float2 memFun() { return i; }
};

float4 main() : SV_Target0
{
   type1 test;
   test.setmem(float4(2.0,2.0,2.0,2.0));
   test.seti(17);
   float4 f4 = float4(1.0,1.0,1.0,1.0);
   f4 += test.memFun(float4(5.0f,5.0f,5.0f,5.0f));
   f4 += test.memFun(7);
   return f4;
}