Add `IArray`. (#3281)

* Initial support for generic interfaces.

* Cleanup.

* Add generic syntax for interfaces.

* Add `IArray`.

* Fix.

* Fix.

* Fix.

---------

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/tests/language-feature/generics/iarray.slang b/tests/language-feature/generics/iarray.slang
new file mode 100644
index 000000000..c2314f106
--- /dev/null
+++ b/tests/language-feature/generics/iarray.slang
@@ -0,0 +1,37 @@
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -shaderobj -output-using-type
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -vk -shaderobj -output-using-type
+
+T sum<T:__BuiltinArithmeticType>(IArray<T> array)
+{
+    T result = T(0);
+    for (int i = 0; i < array.getCount(); i++)
+    {
+        result = result + array[i];
+    }
+    return result;
+}
+vector<T,N> sum<T:__BuiltinArithmeticType, let N:int>(IArray<vector<T,N>> array)
+{
+    vector<T,N> result = vector<T,N>(T(0));
+    for (int i = 0; i < array.getCount(); i++)
+    {
+        result = result + array[i];
+    }
+    return result;
+}
+//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);
+    outputBuffer[0] = sum(arr);
+    outputBuffer[1] = sum(v);
+    outputBuffer[2] = sum(sum(m));
+    // CHECK: 6.0
+    // CHECK: 10.0
+    // CHECK: 10.0
+}