interface IRWArray<T>
Description
Represents types that provide a subscript operator so that they can be used like a mutable array.
Generic Parameters
T
The element type returned by the subscript operator.
Methods
Remarks
This interface is implemented by Array, vector, matrix, StructuredBuffer and RWStructuredBuffer types.
Example
The follow example shows how to define a generic function uses the IRWArray interface to mutate an array-like value.
void writeToArray<U, T : IRWArray<U>>(inout T array, int index, U value) { array[index] = value; }
void writeToBuffer<U, T : IRWArray<U>>(T array, int index, U value) { array[index] = value; }
U readFromArray<U, T:IArray<U>>(T array, int index) { return array[index]; }
//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
RWStructuredBuffer<float> outputBuffer;
[numthreads(1, 1, 1)]
void computeMain(int3 dispatchThreadID: SV_DispatchThreadID)
{
float arr[3] = { 1.0, 2.0, 3.0 };
float4 v = float4(1.0, 2.0, 3.0, 4.0);
float2x2 m = float2x2(1.0, 2.0, 3.0, 4.0);
// treat `outputBuffer` as a mutable array of `float`.
writeToBuffer(outputBuffer, 0, 1.0f);
// treat `arr` as a mutable array of `float`.
writeToArray(arr, 0, 4.0f);
outputBuffer[1] = readFromArray(arr, 0); // 4.0
// treat `v` as a mutable array of `float`.
writeToArray(v, 3, 3.0f);
outputBuffer[2] = readFromArray(v, 3); // 3.0
// treat `m` as a mutable array of `float2`.
writeToArray(m, 1, float2(10.0f, 20.0f));
outputBuffer[3] = readFromArray(m, 1).x + readFromArray(m, 1).y; // 30.0
writeToBuffer(outputBuffer, 0, readFromArray(outputBuffer, 0));
}