From 3d40c7ed7d86c2afd111fee4f2d7bc3c3d0d62d6 Mon Sep 17 00:00:00 2001
From: postman01 <wanglei1949@gmail.com>
Date: Thu, 3 Aug 2023 09:25:55 +0800
Subject: [PATCH] bug fix

---
 ch19/ex19_21_22_23_24_25.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ch19/ex19_21_22_23_24_25.cpp b/ch19/ex19_21_22_23_24_25.cpp
index df36a9545..e55d51a43 100644
--- a/ch19/ex19_21_22_23_24_25.cpp
+++ b/ch19/ex19_21_22_23_24_25.cpp
@@ -46,8 +46,8 @@ void Token::copyUnion(Token&& t){
     switch (t.tok) {
         case INT  : ival = t.ival; break;
         case CHAR : cval = t.cval; break;
-        case STR  : std::move(t.sval);break;
-        case SAL  : std::move(t.item); break;
+        case STR  : new(&sval) string(std::move(t.sval));break;
+        case SAL  : new(&item) Sales_data(std::move(t.item)); break;
     }
 }
 void Token::copyUnion(const Token &t){