From 93a553ea93b7e161a39c5dafebd63d511588b5a0 Mon Sep 17 00:00:00 2001
From: Luke <luke.k.xu@hotmail.com>
Date: Wed, 16 Jul 2025 23:16:12 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=E6=95=B0=E5=AD=97?=
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- 新增 skipInvalidLexeme 方法，用于跳过无效的标识符和数字字符
- 修改错误处理逻辑，遇到词法错误时调用 skipInvalidLexeme 方法
---
 .../snow/compiler/lexer/core/LexerEngine.java    | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/jcnc/snow/compiler/lexer/core/LexerEngine.java b/src/main/java/org/jcnc/snow/compiler/lexer/core/LexerEngine.java
index 658182d..7272b77 100644
--- a/src/main/java/org/jcnc/snow/compiler/lexer/core/LexerEngine.java
+++ b/src/main/java/org/jcnc/snow/compiler/lexer/core/LexerEngine.java
@@ -87,7 +87,7 @@ public class LexerEngine {
                     errors.add(new LexicalError(
                             absPath, le.getLine(), le.getColumn(), le.getReason()
                     ));
-                    context.advance();           // 跳过问题字符
+                    skipInvalidLexeme();
                 }
                 handled = true;
                 break;
@@ -97,6 +97,20 @@ public class LexerEngine {
         }
         tokens.add(Token.eof(context.getLine()));
     }
+    /**
+     * 跳过当前位置起连续的“标识符 / 数字 / 下划线 / 点”字符。
+     * <p>这样可以把诸如 {@code 1abc} 的残余 {@code abc}、{@code _}、
+     * {@code .999} 等一次性忽略，避免后续被误识别为新的 token。</p>
+     */
+    private void skipInvalidLexeme() {
+        while (!context.isAtEnd()) {
+            char c = context.peek();
+            if (Character.isWhitespace(c)) break;           // 空白 / 换行
+            if (!Character.isLetterOrDigit(c)
+                    && c != '_' && c != '.') break;         // 符号分隔
+            context.advance();                              // 否则继续吞掉
+        }
+    }
 
     /**
      * 目前包含三条规则: <br>