[HLSL 2021] Setter array subscript operator overload

[tomjohnstone]

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Hi,

How can I implement a setter array subscript operator overload? A getter works like this but doesn't require references like C does.

Thanks, Tom

struct MyArray {
  float4 A[MAX_SIZE];
  
  float4 operator[](int ix) {
    if (ix >= MAX_SIZE)
      return 0.0;
    return A[ix];
  };
};

[natevm]

Running into the same issue about a year later. How can we assign to the subscript operator?

[pow2clk]

Unfortunately, this is not currently possible due to lack of reference support in HLSL. It is something we want to improve in later versions.

[llvm-beanz]

This is caused by broken behavior in DXC's overload resolution. We have a bunch of related issues that will need to be addressed in order to support this planned fix for HLSL 202x.

That feature is effectively going to result in us adopting C++ overload rules completely for HLSL, which should solve this and related issues.