Implement C++ style default member initializer (#7087)

close #7069.

We just insert the assignment expression to the beginning of the user-defined ctor, where the assignee is the member with init expression.

1 files changed, 100 insertions, 0 deletions

diff --git a/tests/initializer-list/cpp-style-default-member-init.slang b/tests/initializer-list/cpp-style-default-member-init.slang
new file mode 100644
index 000000000..48ee221cf
--- /dev/null
+++ b/tests/initializer-list/cpp-style-default-member-init.slang
@@ -0,0 +1,100 @@
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=BUFFER):-shaderobj -vk -output-using-type
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=BUFFER):-shaderobj -output-using-type
+
+struct NonCStyle
+{
+  int x = 3;
+  float y = 4.0f;
+  int z[2] = {5, 6};
+  float2 w = {7.0f, 8.0f};
+
+  __init(int x)
+  {
+    this.x = x;
+  }
+
+  __init(int x, float y)
+  {
+    this.x = x;
+    this.y = y;
+  }
+
+  __init(int arr[2])
+  {
+    this.z[0] = arr[0];
+    this.z[1] = arr[1];
+  }
+
+  __init(float2 vec)
+  {
+    this.w= vec;
+  }
+}
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0 0 0   0 0 0 0 0 0   0 0 0 0 0 0   0 0 0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+void test()
+{
+  int idx = 0;
+  NonCStyle s1 = NonCStyle(1);
+  outputBuffer[idx++] = s1.x;
+  // BUFFER: 1
+  outputBuffer[idx++] = s1.y;
+  // BUFFER: 4.0
+  outputBuffer[idx++] = s1.z[0];
+  // BUFFER: 5
+  outputBuffer[idx++] = s1.z[1];
+  // BUFFER: 6
+  outputBuffer[idx++] = s1.w.x;
+  // BUFFER: 7
+  outputBuffer[idx++] = s1.w.y;
+  // BUFFER: 8
+
+  NonCStyle s2 = NonCStyle(1, 12.0);
+  outputBuffer[idx++] = s2.x;
+  // BUFFER: 1
+  outputBuffer[idx++] = s2.y;
+  // BUFFER: 12.0
+  outputBuffer[idx++] = s2.z[0];
+  // BUFFER: 5
+  outputBuffer[idx++] = s2.z[1];
+  // BUFFER: 6
+  outputBuffer[idx++] = s2.w.x;
+  // BUFFER: 7
+  outputBuffer[idx++] = s2.w.y;
+  // BUFFER: 8
+
+  NonCStyle s3 = NonCStyle(Array<int, 2>(21u, 22u));
+  outputBuffer[idx++] = s3.x;
+  // BUFFER: 3
+  outputBuffer[idx++] = s3.y;
+  // BUFFER: 4.0
+  outputBuffer[idx++] = s3.z[0];
+  // BUFFER: 21
+  outputBuffer[idx++] = s3.z[1];
+  // BUFFER: 22
+  outputBuffer[idx++] = s3.w.x;
+  // BUFFER: 7
+  outputBuffer[idx++] = s3.w.y;
+  // BUFFER: 8
+
+  NonCStyle s4 = NonCStyle(float2(31, 32));
+  outputBuffer[idx++] = s4.x;
+  // BUFFER: 3
+  outputBuffer[idx++] = s4.y;
+  // BUFFER: 4.0
+  outputBuffer[idx++] = s4.z[0];
+  // BUFFER: 5
+  outputBuffer[idx++] = s4.z[1];
+  // BUFFER: 6
+  outputBuffer[idx++] = s4.w.x;
+  // BUFFER: 31
+  outputBuffer[idx++] = s4.w.y;
+  // BUFFER: 32
+}
+
+[shader("compute")]
+void computeMain()
+{
+    test();
+}