feat: defer 延迟执行 — defer { stmts; } 在 return 前按 LIFO 执行

Token(73): +TOK_DEFER, AST(28): +AST_DEFER_STMT, 新增 38_defer.l parser: defer { ... } 块 + defer expr; 表达式两种形式 codegen: defer 栈压入 block, emit_deferred() 在 return 前 LIFO 发射 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-06-07 13:51:10 +08:00
parent e60021b684
commit 0088347576
10 changed files with 62 additions and 6 deletions
@@ -0,0 +1,7 @@
+fn main() -> i64 {
+    var x = 10;
+    defer { print_str("deferred"); }
+    print_str("normal");
+    print_i64(x);
+    return 0;
+}