Support generic interfaces. (#3278)

* Initial support for generic interfaces.

* Cleanup.

* Add generic syntax for interfaces.

---------

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

1 files changed, 37 insertions, 0 deletions

diff --git a/tests/language-feature/generics/generic-interface-1.slang b/tests/language-feature/generics/generic-interface-1.slang
new file mode 100644
index 000000000..217e7f06f
--- /dev/null
+++ b/tests/language-feature/generics/generic-interface-1.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
+
+interface IEqlTestable<T>
+{
+    bool testEql(T v1);
+}
+
+bool test<T>(IEqlTestable<T> v0, T v1)
+{
+    return v0.testEql(v1);
+}
+
+struct MyType : IEqlTestable<MyType>
+{
+    int val;
+    bool testEql(MyType v1)
+    {
+        return val == v1.val;
+    }
+}
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<int> outputBuffer;
+
+[numthreads(2, 1, 1)]
+void computeMain(int3 dispatchThreadID : SV_DispatchThreadID)
+{
+    int tid = dispatchThreadID.x;
+    MyType obj1, obj2;
+    obj1.val = tid;
+    obj2.val = 1;
+    let result = test(obj1, obj2);
+    outputBuffer[tid] = result ? 1 : 0;
+    // CHECK: 0
+    // CHECK: 1
+}