Fix types for `InputPatch` and `OutputPatch`

Fixes #34.

I'd declared these as if they were `InputPatch<T>`, but they are really `InputPatch<T,N>`.
This change fixes the declarations, and makes these types no longer inherit from the contrived `BuiltinGenericType`.
Instead they are more-or-less ordinary `DeclRefType`s using the same approach that `MatrixExpressionType` uses.

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/bugs/gh-34.hlsl b/tests/bugs/gh-34.hlsl
new file mode 100644
index 000000000..feaddb2ab
--- /dev/null
+++ b/tests/bugs/gh-34.hlsl
@@ -0,0 +1,16 @@
+//TEST:COMPARE_HLSL: -profile gs_5_0 -target dxbc-assembly -no-checking
+
+struct VS_OUT { float3 p : POSITION; };
+
+[maxvertexcount(3)]
+void main(InputPatch<VS_OUT, 3> input, inout TriangleStream<VS_OUT> outStream)
+{
+    VS_OUT output;
+    for (uint i = 0; i < 3; i += 1)
+    {
+        output = input[i];
+        outStream.Append(output);
+    }
+
+    outStream.RestartStrip();
+}