fix:修复前端bug (#83)

Co-authored-by: jackfiled <xcrenchangjun@outlook.com>
Reviewed-on: PostGuard/Canon#83
Co-authored-by: ichirinko <1621543655@qq.com>
Co-committed-by: ichirinko <1621543655@qq.com>

Canon.Core/Exceptions/CanonException.cs

@@ -0,0 +1,19 @@
+namespace Canon.Core.Exceptions;
+
+/// <summary>
+/// 编译器中的统一异常基类
+/// </summary>
+public class CanonException : Exception
+{
+    public CanonException()
+    {
+    }
+
+    public CanonException(string message) : base(message)
+    {
+    }
+
+    public CanonException(string message, Exception innerException) : base(message, innerException)
+    {
+    }
+}

Canon.Core/Exceptions/GrammarException.cs

@@ -8,7 +8,7 @@ namespace Canon.Core.Exceptions;
 /// <summary>
 /// 语法分析中引发的异常
 /// </summary>
-public class GrammarException : Exception
+public class GrammarException : CanonException
 {
     public override string Message { get; }
 

Canon.Core/Exceptions/LexemeException.cs

@@ -3,32 +3,32 @@ using Enums;
 /// <summary>
 /// 词法分析中引发的异常
 /// </summary>
-public class LexemeException : Exception
+public class LexemeException : CanonException
 {
     public LexemeErrorType ErrorType { get; }
+
     public uint Line { get; }
+
     public uint CharPosition { get; }
-    public LexemeException()  { }
 
-    public LexemeException(string message) : base(message) { }
-
-    public LexemeException(string message, Exception innerException) :
-        base(message, innerException) { }
+    private readonly string _message;
 
     /// <param name="errorType">错误类型</param>
     /// <param name="line">单词的行号</param>
     /// <param name="charPosition">单词的列号</param>
     /// <param name="message">错误信息</param>
-    public LexemeException(LexemeErrorType errorType, uint line, uint charPosition, string message) :
-        base("line:" + line + ", charPosition:" + charPosition + " :" + message)
+    public LexemeException(LexemeErrorType errorType, uint line, uint charPosition, string message)
     {
         ErrorType = errorType;
         Line = line;
         CharPosition = charPosition;
+        _message = message;
     }
 
+    public override string Message => ToString();
+
     public override string ToString()
     {
-        return $"LexemeException: ErrorType={ErrorType}, Line={Line}, CharPosition={CharPosition}, Message={Message}\n";
+        return $"LexemeException: ErrorType={ErrorType}, Line={Line}, CharPosition={CharPosition}, Message={_message}\n";
     }
 }