脚本节点新增对Char字面量的支持

Serein.Script/SereinScriptLexer.cs

@@ -11,7 +11,7 @@ namespace Serein.Script
         /// </summary>
         Null,
         /// <summary>
-        /// 标识符
+        /// 标识符（变量）
         /// </summary>
         Identifier,
         /// <summary>
@@ -27,6 +27,10 @@ namespace Serein.Script
         /// </summary>
         String,
         /// <summary>
+        /// Char字符
+        /// </summary>
+        Char,
+        /// <summary>
         /// 插值字符串
         /// </summary>
         InterpolatedString,
@@ -163,6 +167,20 @@ namespace Serein.Script
                 return ReadString();
             }
 
+            if (currentChar == '\'')
+            {
+                if (_input[_index + 2] == '\'')
+                {
+
+                    return ReadChar();
+                }
+                else
+                {
+                    throw new Exception($"not is char: {currentChar},in Line.{_row}.");
+                }
+            }
+
+
             // 跳过注释
             if (_input[_index] == '/' && _input[_index + 1] == '/')
             {
@@ -332,6 +350,23 @@ namespace Serein.Script
             //return new Token(TokenType.String, value.ToString());
         }
 
+        /// <summary>
+        /// 读取硬编码的Char字符
+        /// </summary>
+        /// <returns></returns>
+        /// <exception cref="Exception"></exception>
+        private Token ReadChar()
+        {
+            _index++;  // 跳过开头的引号
+            var start = _index;
+            var cahrValue = _input.Slice(start, 1).ToString();
+            _index++; // 跳过Char字符串后的引号
+            return CreateToken(TokenType.Char, cahrValue);
+
+            // _index++;  // 跳过结束的引号
+            //return new Token(TokenType.String, value.ToString());
+        }
+
         /// <summary>
         /// 获取对应行的代码文本
         /// </summary>