Import YamlDotNet.

2022-12-12 22:23:49 +08:00
parent f559cea826
commit 1477e907e6
462 changed files with 27142 additions and 0 deletions
--- a/Assets/YamlDotNet/Serialization/NodeDeserializers/NullNodeDeserializer.cs
+++ b/Assets/YamlDotNet/Serialization/NodeDeserializers/NullNodeDeserializer.cs
@@ -0,0 +1,63 @@
+// This file is part of YamlDotNet - A .NET library for YAML.
+// Copyright (c) Antoine Aubry and contributors
+//
+// 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.
+
+using System;
+using YamlDotNet.Core;
+using YamlDotNet.Core.Events;
+
+namespace YamlDotNet.Serialization.NodeDeserializers
+{
+    public sealed class NullNodeDeserializer : INodeDeserializer
+    {
+        bool INodeDeserializer.Deserialize(IParser parser, Type expectedType, Func<IParser, Type, object?> nestedObjectDeserializer, out object? value)
+        {
+            value = null;
+            if (parser.Accept<NodeEvent>(out var evt))
+            {
+                if (NodeIsNull(evt))
+                {
+                    parser.SkipThisAndNestedEvents();
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        private bool NodeIsNull(NodeEvent nodeEvent)
+        {
+            // http://yaml.org/type/null.html
+
+            if (nodeEvent.Tag == "tag:yaml.org,2002:null")
+            {
+                return true;
+            }
+
+            if (nodeEvent is Scalar scalar && scalar.Style == Core.ScalarStyle.Plain)
+            {
+                var value = scalar.Value;
+                return value == "" || value == "~" || value == "null" || value == "Null" || value == "NULL";
+            }
+
+            return false;
+        }
+    }
+}