Fix crash when compiling associatedtypes with generic interface constraints. (#5200)

* Fix crash when compiling associatedtypes with generic interface constraints.

* delete hlsl.meta.slang.temp.h.

* Fix.

1 files changed, 44 insertions, 0 deletions

diff --git a/tests/language-feature/generics/generic-assoc-type-constraint.slang b/tests/language-feature/generics/generic-assoc-type-constraint.slang
new file mode 100644
index 000000000..6b9aa1b01
--- /dev/null
+++ b/tests/language-feature/generics/generic-assoc-type-constraint.slang
@@ -0,0 +1,44 @@
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -shaderobj -output-using-type
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -vk -shaderobj -output-using-type
+
+// Test that an associated type can be constrained to a generic interface.
+
+
+interface IB<let DIM : int>
+{
+    int bar();
+}
+
+interface IA<let DIM : int>
+{
+    associatedtype B : IB<DIM>;
+    B getB();
+}
+
+struct BImpl<int x> : IB<x>
+{
+    int bar() { return x; }
+}
+
+struct AImpl<int y> : IA<y>
+{
+    typealias B = BImpl<y>;
+    B getB() { BImpl<y> b = {}; return b; }
+}
+
+int test<int z, T : IA<z>>(T t)
+{
+    T.B bb = t.getB();
+    return bb.bar();
+}
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<int> outputBuffer;
+
+[numthreads(1,1,1)]
+void computeMain()
+{
+    AImpl<5> a;
+    // CHECK: 5
+    outputBuffer[0] = test(a);
+}
\ No newline at end of file