should be it

external/duckdb/third_party/skiplist/IntegrityEnums.h

@@ -0,0 +1,62 @@
+#ifndef SkipList_IntegrityEnums_h
+#define SkipList_IntegrityEnums_h
+
+/**
+ * @file
+ *
+ * Project: skiplist
+ *
+ * Integrity codes for structures in this code.
+ *
+ * Created by Paul Ross on 11/12/2015.
+ *
+ * Copyright (c) 2015-2023 Paul Ross. All rights reserved.
+ *
+ * @code
+ * MIT License
+ *
+ * Copyright (c) 2015-2023 Paul Ross
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ * @endcode
+ */
+
+/**
+ * Various integrity codes for structures in this code.
+ */
+enum IntegrityCheck {
+    INTEGRITY_SUCCESS = 0,
+    // SwappableNodeRefStack integrity checks
+    NODEREFS_WIDTH_ZERO_NOT_UNITY = 100,
+    NODEREFS_WIDTH_DECREASING,
+    // Node integrity checks
+    NODE_HEIGHT_ZERO = 200,
+    NODE_HEIGHT_EXCEEDS_HEADNODE,
+    NODE_NON_NULL_AFTER_NULL,
+    NODE_SELF_REFERENCE,
+    NODE_REFERENCES_NOT_IN_GLOBAL_SET,
+    // HeadNode integrity checks
+    HEADNODE_CONTAINS_NULL = 300,
+    HEADNODE_COUNT_MISMATCH,
+    HEADNODE_LEVEL_WIDTHS_MISMATCH,
+    HEADNODE_DETECTS_CYCLIC_REFERENCE,
+    HEADNODE_DETECTS_OUT_OF_ORDER,
+};
+
+#endif