1 files changed, 45 insertions, 0 deletions
diff --git a/tests/language-feature/struct-field-initializers/struct-field-initializer-extension.slang b/tests/language-feature/struct-field-initializers/struct-field-initializer-extension.slang
new file mode 100644
index 000000000..1acfeeba7
--- /dev/null
+++ b/tests/language-feature/struct-field-initializers/struct-field-initializer-extension.slang
@@ -0,0 +1,45 @@
+//TEST:SIMPLE(filecheck=CHECK): -target hlsl -stage compute -entry computeMain
+RWStructuredBuffer<int> outputBuffer;
+
+//CHECK: error 30851
+
+struct DefaultStructNoInit
+{
+    int data0 = 2;
+    int data1 = 2;
+
+};
+extension DefaultStructNoInit
+{
+}
+
+struct DefaultStructWithInit
+{
+    int data0;
+    int data1 = 3;
+    int data2;
+};
+extension DefaultStructWithInit
+{
+    __init()
+    {
+        data0 = 3;
+        data2 = 3;
+    }
+}
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
+{
+    DefaultStructNoInit noInit = DefaultStructNoInit();
+    DefaultStructWithInit withInit = DefaultStructWithInit();
+    // BUF: 1
+    outputBuffer[0] = true
+        && noInit.data0 == 2
+        && noInit.data1 == 2
+
+        && withInit.data0 == 3
+        && withInit.data1 == 3
+        && withInit.data2 == 3
+        ;
+}
+\ No newline at end of file