snapshot before regression test

TransPyV/Test/App/new_test.py

@@ -0,0 +1,119 @@
+import stdio
+import t, c
+
+
+# ============================================================
+# __new__ 函数测试：验证 __new__ 在创建 OOP 结构体前被调用，
+# 返回的指针作为结构体存储空间。
+#
+# __new__ 签名默认和 __init__ 一样（self + args），返回 Ptr(struct_ty)。
+# 如果 __new__ 返回 self，则使用默认 alloca 作为存储空间。
+# ============================================================
+
+
+# ============================================================
+# Test 1: __new__ 返回 self（默认 alloca）
+# 验证 __new__ 被调用且不破坏 __init__ 正常功能
+# ============================================================
+class WithNew:
+    value: t.CInt
+
+    def __new__(self, v: t.CInt):
+        stdio.printf("new: WithNew.__new__ called\n")
+        return self
+
+    def __init__(self, v: t.CInt):
+        stdio.printf("new: WithNew.__init__ called\n")
+        self.value = v
+
+    def GetValue(self) -> t.CInt:
+        return self.value
+
+
+# ============================================================
+# Test 2: __new__ 不接受额外参数（仅 self）
+# 验证 __new__ 签名可以与 __init__ 不同
+# ============================================================
+class WithNewNoArgs:
+    value: t.CInt
+
+    def __new__(self):
+        stdio.printf("new: WithNewNoArgs.__new__ called\n")
+        return self
+
+    def __init__(self, v: t.CInt):
+        self.value = v
+
+    def GetValue(self) -> t.CInt:
+        return self.value
+
+
+# ============================================================
+# Test 3: __new__ + @t.CVTable 虚表类
+# 验证 __new__ 与虚表机制兼容（__new__ 不进入虚表）
+# ============================================================
+@t.CVTable
+class WithNewVTable:
+    value: t.CInt
+
+    def __new__(self, v: t.CInt):
+        stdio.printf("new: WithNewVTable.__new__ called\n")
+        return self
+
+    def __init__(self, v: t.CInt):
+        self.value = v
+
+    def GetValue(self) -> t.CInt:
+        return self.value
+
+    def Speak(self) -> t.CInt:
+        return self.value + 1
+
+
+def new_test() -> int:
+    stdio.printf("new: === Test Start ===\n")
+
+    # ============================================================
+    # Test 1: __new__ 返回 self
+    # ============================================================
+    stdio.printf("new: === Test 1: __new__ returns self ===\n")
+
+    w: WithNew = WithNew(42)
+    v: int = w.GetValue()
+    stdio.printf("new: w.GetValue()=%d (expected 42)\n", v)
+    if v != 42:
+        stdio.printf("[FAIL] w.GetValue()=%d expected 42\n", v)
+        return 1
+
+    # ============================================================
+    # Test 2: __new__ 不接受额外参数
+    # ============================================================
+    stdio.printf("new: === Test 2: __new__ no extra args ===\n")
+
+    n: WithNewNoArgs = WithNewNoArgs(99)
+    nv: int = n.GetValue()
+    stdio.printf("new: n.GetValue()=%d (expected 99)\n", nv)
+    if nv != 99:
+        stdio.printf("[FAIL] n.GetValue()=%d expected 99\n", nv)
+        return 1
+
+    # ============================================================
+    # Test 3: __new__ + 虚表类
+    # ============================================================
+    stdio.printf("new: === Test 3: __new__ + vtable ===\n")
+
+    vt: WithNewVTable = WithNewVTable(10)
+    vtv: int = vt.GetValue()
+    stdio.printf("new: vt.GetValue()=%d (expected 10)\n", vtv)
+    if vtv != 10:
+        stdio.printf("[FAIL] vt.GetValue()=%d expected 10\n", vtv)
+        return 1
+
+    vts: int = vt.Speak()
+    stdio.printf("new: vt.Speak()=%d (expected 11)\n", vts)
+    if vts != 11:
+        stdio.printf("[FAIL] vt.Speak()=%d expected 11\n", vts)
+        return 1
+
+    stdio.printf("new: === All Tests Passed ===\n")
+    return 0