Tuple swizzling, concat, comparison and `countof`. (#4856)

* Tuple swizzling and element access.

* Update proposal status.

* Cleanup.

* Fix merrge error.

* Address review.

1 files changed, 20 insertions, 0 deletions

diff --git a/tests/language-feature/tuple/tuple-parameter.slang b/tests/language-feature/tuple/tuple-parameter.slang
new file mode 100644
index 000000000..788b2cc31
--- /dev/null
+++ b/tests/language-feature/tuple/tuple-parameter.slang
@@ -0,0 +1,20 @@
+// Test using tuples in shader parameters.
+
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-shaderobj
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-dx12 -use-dxil -shaderobj
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-vk -shaderobj
+
+//TEST_INPUT:ubuffer(data=[1 2 3 4], stride=4):out,name=outputBuffer
+RWStructuredBuffer<int> outputBuffer;
+
+//TEST_INPUT: set g_texture = new Tuple<Texture2D, SamplerState>{Texture2D(size=4, content=one), Sampler}
+ConstantBuffer<Tuple<Texture2D, SamplerState>> g_texture;
+//TEST_INPUT: set g_texture2 = new Tuple<Texture2D, SamplerState>{Texture2D(size=4, content=one), Sampler}
+ConstantBuffer<Tuple<Texture2D, SamplerState>> g_texture2;
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    // CHECK: 4
+    outputBuffer[0] = (int)g_texture2._0.SampleLevel(g_texture._1, float2(0.0), 0).x;
+}