c++ - 谁能解释一下当前C++0x标准草案的这一段？

Question

谁能解释 ISO N3242 §3.2 第 2 点中的这个陈述

A member of a set of candidate functions is odr-used if it is selected by overload resolution when referred to from a potentiallyevaluated expression. [ Note: This covers calls to named functions (5.2.2), operator overloading (Clause 13),user-defined conversions (12.3.2), allocation function for placement new (5.3.4), as well as non-default initialization(8.5).

ISO 标准 2003:说

An overloaded function is used if it is selected by overload resolution when referred to from a potentially-evaluated expression. [Note: this covers calls to named functions (5.2.2), operator overloading (clause 13), user-defined conversions (12.3.2), allocation function for placement new (5.3.4), as well as non-default initialization (8.5).

这些陈述的实际区别是什么？

任何人都可以借助示例/程序来解释这一点吗？

Answer 1

术语“重载函数”在指的是成员还是指集合之间(稍微)有歧义。 C++11 阐明了从未从潜在求值表达式中选择的函数不会被 ODR 使用。

术语“odr-used”是 C++11 中的新术语。它本质上意味着给定的对象可能在最终编译的二进制文件中表示，并且 one-definition rule适用。