From 447b7e0e2be031409b1421b49c81f020353bf7c5 Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Tue, 21 Dec 2021 16:35:34 -0500
Subject: Language experiments (#2068)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Moved to experiments.
Added some more tests.

* More tests around associated types.

* Return interface tests.

* More tests.
---
 tests/experiments/generic/fixed-array-5.slang | 61 +++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 tests/experiments/generic/fixed-array-5.slang

(limited to 'tests/experiments/generic/fixed-array-5.slang')

diff --git a/tests/experiments/generic/fixed-array-5.slang b/tests/experiments/generic/fixed-array-5.slang
new file mode 100644
index 000000000..6d0c6f8b9
--- /dev/null
+++ b/tests/experiments/generic/fixed-array-5.slang
@@ -0,0 +1,61 @@
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj
+
+/* A test around use of an array like container. 
+
+Here the attempt is to make the equality test separate from the type. 
+This isn't a great answer because it relies on the right types set
+for T and E to work together.
+
+This doesn't work because...
+.slang(25): error 30019: expected an expression of type 'Type', got 'T'
+            if (E::isEqual(v, elements[i]))
+
+ */
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+interface IEquality
+{
+    associatedtype Type;
+    static bool isEqual(Type a, Type b);
+};
+
+struct IntEquality : IEquality
+{
+    typedef int Type;
+    static bool isEqual(Type a, Type b) { return a == b; }
+};
+
+struct FixedArray<T, E : IEquality> 
+{
+    static const int SIZE = 4;
+    
+    [mutating] void setAt(int i, T value) { elements[i] = value; }
+    T getAt(int i) { return elements[i]; }
+    int indexOf(T v)
+    {
+        for (int i = 0; i < SIZE; ++i)
+        {
+            if (E::isEqual(v, elements[i]))
+            {
+                return i;
+            }
+            return -1;
+        }
+    }
+    T elements[SIZE];
+};
+
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    int index = dispatchThreadID.x;
+
+    FixedArray<int, IntEquality> arr;
+    arr.setAt(0, index);
+    
+	outputBuffer[index] = 1 + arr.getAt(0);
+}
+
-- 
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