From d33e6b7475a87d5a62101afc81813e9c9e458a70 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Sun, 14 Jan 2018 16:22:11 -0500
Subject: allow extension of a concrete type to implement additional interface

Also support the scenario that the extension declares conformance to interface I, and a method M in I is already supported by the base implementation.
---
 tests/compute/multi-interface.slang | 45 +++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 tests/compute/multi-interface.slang

(limited to 'tests/compute/multi-interface.slang')

diff --git a/tests/compute/multi-interface.slang b/tests/compute/multi-interface.slang
new file mode 100644
index 000000000..1f9775211
--- /dev/null
+++ b/tests/compute/multi-interface.slang
@@ -0,0 +1,45 @@
+//TEST(compute):COMPARE_COMPUTE:-xslang -use-ir
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):dxbinding(0),glbinding(0),out
+
+RWStructuredBuffer<float> outputBuffer;
+
+interface IAdd
+{
+    float addf(float u, float v);
+}
+
+interface ISub
+{
+    float subf(float u, float v);
+}
+
+interface IAddAndSub
+{
+    float addf(float u, float v);
+    float subf(float u, float v);    
+}
+
+struct Simple : IAdd, ISub, IAddAndSub
+{
+    float addf(float u, float v)
+    {
+        return u+v;
+    }
+    float subf(float u, float v)
+    {
+        return u-v;
+    }
+};
+
+float testAddSub<T:IAddAndSub>(T t)
+{
+    return t.subf(t.addf(1.0, 1.0), 1.0);
+}
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    Simple s;
+	float outVal = testAddSub(s);
+	outputBuffer[dispatchThreadID.x] = outVal;
+}
\ No newline at end of file
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