Fix generation of wgsl case arms (#7374)

* Fix generation of wgsl case arms

* Added test case to test generation of switch case

---------

Co-authored-by: Harsh Aggarwal (NVIDIA) <haaggarwal@nvidia.com>

1 files changed, 14 insertions, 6 deletions

diff --git a/source/slang/slang-emit-wgsl.cpp b/source/slang/slang-emit-wgsl.cpp
index d8a243b32..61f34d408 100644
--- a/source/slang/slang-emit-wgsl.cpp
+++ b/source/slang/slang-emit-wgsl.cpp
@@ -66,16 +66,24 @@ void WGSLSourceEmitter::emitSwitchCaseSelectorsImpl(
     // "case 2, 3, 4: ...;" instead of the C-like syntax
     // "case 2: case 3: case 4: ...;".
 
-    m_writer->emit("case ");
-    for (auto caseVal : currentCase->values)
+    if (!isDefault)
     {
-        emitOperand(caseVal, getInfo(EmitOp::General));
-        m_writer->emit(", ");
+        m_writer->emit("case ");
+        auto& values = currentCase->values;
+        for (Index i = 0; i < values.getCount(); ++i)
+        {
+            emitOperand(values[i], getInfo(EmitOp::General));
+            if (i < values.getCount() - 1)
+            {
+                m_writer->emit(", ");
+            }
+        }
     }
-    if (isDefault)
+    else
     {
-        m_writer->emit("default, ");
+        m_writer->emit("default ");
     }
+
     m_writer->emit(":\n");
 }