std::regex_traits::transform
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< cpp | regex | regex traits
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| template< class ForwardIt > string_type transform( ForwardIt first, ForwardIt last) const |
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[first, last)，例如，如果一个排序键比另一种键与operator<比较少，那么第一个排序键的字符序列来之前的字符序列，产生了第二个排序关键字，在目前取得的排序关键字的字符序列充满语言环境的整理秩序原文：
Obtains the sort key for the character sequence
[first, last), such that if a sort key compares less than another sort key with operator<, then the character sequence that produced the first sort key comes before the character sequence that produced the second sort key, in the currently imbued locale's collation order.例如，当正则表达式的标志std::regex_constants::collate设置，然后将匹配字符序列
[a-b]c1traits.transform("a") <= traits.transform(c1) <= traits.transform("b")。请注意，该函数接受一个字符序列作为参数，以适应像[[.ae.]-d]定义的范围.....原文：
For example when the regex flag std::regex_constants::collate is set, then the sequence
[a-b] would match some character c1 if traits.transform("a") <= traits.transform(c1) <= traits.transform("b"). Note that this function takes a character sequence as the argument to accomodate to the ranges defined like [[.ae.]-d].std::regex_traits回报std::use_facet<std::collate<CharT>>(getloc()).transform(&*str.begin(), &*str.begin() + str.length())一些临时字符串的标准库专业
str构造string_type str(first, last).原文：
Standard library specializations of std::regex_traits return std::use_facet<std::collate<CharT>>(getloc()).transform(&*str.begin(), &*str.begin() + str.length()) for some temporary string
str constructed as string_type str(first, last).[编辑] 参数
| first, last | - | ，一对
ForwardIterators确定要比较的字符序列原文： a pair of ForwardIterators which determines the sequence of characters to compare |
| 类型要求 | ||
-ForwardIt 必须满足 ForwardIterator 的要求。
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[编辑] 返回值
整理键的字符序列
[first, last)在目前充满的区域设置.原文：
The collation key for the character sequence
[first, last) in the currently imbued locale.[编辑] 示例
| 本章尚未完成 原因：暂无示例 |
