Re: [問題] realloc在cpp中有替代方案嗎?
推 cplusplus:原因我是忘了 找看看C++ Object Model吧 裡面有提到
您好, 在您提的書我剛找來翻了 :)
因為書中提到的部份是根據spec來的,
所以我摘spec中對於data member順序配置的部份出來.
大意是說, 同一access下有要求先宣告先配置,
但不同access下的順序沒有明定.
C++98與C++03的定義一樣, 內文如下:
9.2 Class members
12.
Nonstatic data members of a (non-union) class declared without an
intervening access-specifier are allocated so that later members have
higher addresses withing a class object. The order of allocation of
nonstatic data members separated by an access-specifier is unspecified
(11.1). Implementation alignment requirements might cause two adjacent
members not to be allocated immediately after each other; so might
requirements for space for managing virtual functions (10.3) and
virtual base classese (10.1).
然後作者提到, 雖然不同access下的順序沒有定義, 但整個class仍是要
配成連序空間.
原文在 Inside The C++ Object Model (3.2 Data member layout)
感謝cplusplus提供書藉資訊 :p
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06/14 20:46, , 1F
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