From d25829760949e585a3785a41c359c55067be9178 Mon Sep 17 00:00:00 2001
From: Luke <luke.k.xu@hotmail.com>
Date: Mon, 1 Sep 2025 09:23:21 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E6=94=AF=E6=8C=81=E7=BB=93=E6=9E=84?=
 =?UTF-8?q?=E4=BD=93=E7=BB=A7=E6=89=BF?=
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- 添加对结构体继承的支持，允许使用 "extends" 关键字定义父结构体
- 修改 StructNode 构造函数以支持父结构体名称参数
- 优化结构体解析逻辑，处理可选的继承语句
---
 .../jcnc/snow/compiler/parser/struct/StructParser.java | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/jcnc/snow/compiler/parser/struct/StructParser.java b/src/main/java/org/jcnc/snow/compiler/parser/struct/StructParser.java
index b035c1b..da74137 100644
--- a/src/main/java/org/jcnc/snow/compiler/parser/struct/StructParser.java
+++ b/src/main/java/org/jcnc/snow/compiler/parser/struct/StructParser.java
@@ -53,6 +53,14 @@ public class StructParser implements TopLevelParser {
         ts.expect("struct");
         ts.expect(":");
         String structName = ts.expectType(TokenType.IDENTIFIER).getLexeme();
+
+        // 解析可选 extends
+        String parentName = null;
+        if ("extends".equals(ts.peek().getLexeme())) {
+            ts.expect("extends");
+            parentName = ts.expectType(TokenType.IDENTIFIER).getLexeme();
+        }
+
         ts.expectType(TokenType.NEWLINE);
 
         /* -------- 初始化容器 -------- */
@@ -112,7 +120,7 @@ public class StructParser implements TopLevelParser {
                     ts.expect("end");
                     ts.expect("struct");
                     // 返回完整结构体 AST 节点
-                    return new StructNode(structName, fields, init, methods,
+                    return new StructNode(structName, parentName, fields, init, methods,
                             new NodeContext(line, col, file));
                 }