Using a visitor to systematically replace lookup scopes of generic function's return type expression.

fixes #336

Add a `ReplaceScopeVisitor` to replace the scopes of the return type expression tree to use the generic decl's scope instead of module's scope after parser has determined the decl is a generic function header decl.

2 files changed, 32 insertions, 0 deletions

diff --git a/tests/compute/generics-syntax-2.slang b/tests/compute/generics-syntax-2.slang
new file mode 100644
index 000000000..29ed64825
--- /dev/null
+++ b/tests/compute/generics-syntax-2.slang
@@ -0,0 +1,28 @@
+//TEST(compute):COMPARE_COMPUTE:-xslang -use-ir
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):dxbinding(0),glbinding(0),out
+// Confirm that generics syntax can be used in user
+// code and generates valid output.
+
+RWStructuredBuffer<float> outputBuffer;
+
+struct GenStruct<T>
+{
+    T x;
+};
+
+GenStruct<T> test<T>(T val)
+{
+    GenStruct<T> rs;
+    rs.x = val;
+    return rs;
+}
+
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    uint tid = dispatchThreadID.x;
+    float inVal = float(tid);
+    GenStruct<float> outVal = test(inVal);
+    outputBuffer[tid] = outVal.x;
+}
\ No newline at end of file
diff --git a/tests/compute/generics-syntax-2.slang.expected.txt b/tests/compute/generics-syntax-2.slang.expected.txt
new file mode 100644
index 000000000..98798bd61
--- /dev/null
+++ b/tests/compute/generics-syntax-2.slang.expected.txt
@@ -0,0 +1,4 @@
+0
+3F800000
+40000000
+40400000
\ No newline at end of file