std::collate
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| Defined in header <locale>
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| template< class CharT > class collate; |
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类std::collate封装区域设置特定的排序规则（比较）和散列字符串。这方面是使用std::basic_regex，std::locale::operator()手段，可应用于所有的标准算法，期望字符串比较谓词.
Original:
Class std::collate encapsulates locale-specific collation (comparison) and hashing of strings. This facet is used by std::basic_regex and can be applied, by means of std::locale::operator(), directly to all standard algorithms that expect a string comparison predicate.
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Inheritance diagram
两个专业所提供的标准库和所有语言环境中创建的对象在C + +程序实现
Original:
Two specializations are provided by the standard library and are implemented by all locale objects created in a C++ program:
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| Defined in header
<locale> | |
| std::collate<char> | 实现字节字符串的字典序
Original: implements lexicographical ordering of byte strings The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| std::collate<wchar_t> | 实现宽字符串的字典序
Original: implements lexicographical ordering of wide strings The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
目录 |
[编辑] 会员类型
| 会员类型
Original: Member type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Definition |
char_type
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charT
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string_type
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std::basic_string<charT>
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[编辑] 成员函数
| 构造一个新的整理方面 Original: constructs a new collate facet The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数） | |
| 解构一个整理方面 Original: destructs a collate facet The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （受保护的成员函数） | |
| 调用 do_compare Original: invokes do_compare The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数） | |
| 调用 do_transform Original: invokes do_transform The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数） | |
| 调用 do_hash Original: invokes do_hash The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数） | |
[编辑] 会员对象
| static std::locale::id id |
“ID”的语言环境 Original: id of the locale The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员对象） |
[编辑] 受保护的成员函数
| [虚拟的] </ SPAN></div></div>
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使用这方面的排序规则比较两个字符串 Original: compares two strings using this facet's collation rules The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （虚拟保护成员函数） |
| [虚拟的] </ SPAN></div></div>
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转换的字符串排序规则，以便通过比较可以被替换 Original: transforms a string so that collation can be replaced by comparison The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （虚拟保护成员函数） |
| [虚拟的] </ SPAN></div></div>
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生成一个整数的哈希值，使用这方面的排序规则 Original: generates an integer hash value using this facet's collation rules The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （虚拟保护成员函数） |
[编辑] 为例
#include <locale> #include <iostream> #include <string> #include <vector> #include <algorithm> int main() { std::wcout.imbue(std::locale("")); std::vector<std::wstring> v = {L"ar", L"zebra", L"\u00f6grupp", L"Zebra", L"\u00e4ngel", L"\u00e5r", L"f\u00f6rnamn"}; std::wcout << "Default locale collation order: "; std::sort(v.begin(), v.end()); for(auto s : v) std::wcout << s << ' '; std::wcout << '\n'; std::wcout << "English locale collation order: "; std::sort(v.begin(), v.end(), std::locale("en_US.UTF-8")); for(auto s : v) std::wcout << s << ' '; std::wcout << '\n'; std::wcout << "Swedish locale collation order: "; std::sort(v.begin(), v.end(), std::locale("sv_SE.UTF-8")); for(auto s : v) std::wcout << s << ' '; std::wcout << '\n'; }
Output:
Default locale collation order: Zebra ar förnamn zebra ängel år ögrupp English locale collation order: ängel ar år förnamn ögrupp zebra Zebra Swedish locale collation order: ar förnamn zebra Zebra år ängel ögrupp
[编辑] 另请参阅
| lexicographically compares two strings using this locale's collate facet （公共成员函数of std::locale）
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| 创建一个命名的语言环境的整理方面 Original: creates a collate facet for the named locale The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （类模板） | |
