August 2021
Intermediate to advanced
450 pages
6h 57m
Chinese
Content preview from C++程序设计语言（第4部分：标准库）（原书第4版）
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30.3 语言支持
语言支持是标准库中一个很小但至关重要的部分，是程序正常运行所必需的，因为语言特性依赖于这些组件。
30.3.1 initializer_list支持
一个{}列表会依据11.3节中介绍的规则转换为一个std：：initializer_list<X>类型的对象。在<initializer_list>中，我们可以找到initializer_list的定义：
不幸的是，initializer_list并未提供下标运算符。如果你希望用[]而不是*，可对指针使用下标：
initializer_list自然也可用于范围for语句，例如：
30.3.2 范围for支持
如9.5.1节所介绍，一条范围for语句会借助迭代器映射为一条for语句。
在<iterator>中，标准库提供了std：：begin（）和std：：end（）两个函数，可用于内置数组及任何提供了begin（）和end（）成员的类型，见33.3节。 ...
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