std::messages_byname

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C++
 
本地化库
语言环境方面
Original:
Locales and facets
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locale
字符分类
Original:
Character classification
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转换
Original:
Conversions
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wstring_convert（C++11）
wbuffer_convert（C++11）
小面类的基类
Original:
Facet category base classes
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小面类
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Facet categories
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特定于语言环境的方面
Original:
Locale-specific facets
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代码转换方面
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Code conversion facets
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codecvt_utf8（C++11）
codecvt_utf16（C++11）
codecvt_utf8_utf16（C++11）
codecvt_mode（C++11）
C语言环境
Original:
C locale
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Defined in header <locale>
template< class CharT >
class messages_byname : public std::messages<CharT>;
std::messages_byname是一个std::messages方面，它封装在其建设中指定的区域设置的字符串消息目录检索.
Original:
std::messages_byname is a std::messages facet which encapsulates retrieval of strings from message catalogs of the locale specified at its construction.
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两个专业所提供的标准库
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Two specializations are provided by the standard library
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Defined in header <locale>
std::messages_byname<char>
窄/多字节消息目录的访问
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narrow/multibyte message catalog access
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std::messages_byname<wchar_t>
宽字符串消息目录的访问
Original:
wide string message catalog access
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目录

[编辑] 会员类型

会员类型
Original:
Member type
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 Definition
catalog std::messages_base<CharT>::catalog
string_type std::basic_string<CharT>

[编辑] 成员函数
构造一个新messages_byname方面
Original:
constructs a new messages_byname facet
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（公共成员函数）
解构一个messages_byname方面
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destructs a messages_byname facet
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（受保护的成员函数）

Inherited from std::messages

Member types

会员类型
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Member type
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 Definition
char_type charT
string_type std::basic_string<charT>

Member objects

会员名称
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Member name
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 Type
id （静态的） std::locale::id

Member functions
调用do_open
Original:
invokes do_open
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（公共成员函数of std::messages） [edit]
调用do_get
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invokes do_get
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（公共成员函数of std::messages） [edit]
调用do_close
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invokes do_close
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（公共成员函数of std::messages） [edit]

Protected member functions

[虚拟的] </ SPAN></div></div>
打开一个命名的消息目录
Original:
opens a named message catalog
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（虚拟保护成员函数of std::messages） [edit]
[虚拟的] </ SPAN></div></div>
从打开的邮件目录检索消息
Original:
retrieves a message from an open message catalog
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（虚拟保护成员函数of std::messages） [edit]
[虚拟的] </ SPAN></div></div>
关闭信息目录中
Original:
closes a message catalog
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（虚拟保护成员函数of std::messages） [edit]

</div>

[编辑] 为例

#include <iostream>
#include <locale>
 
void try_with(const std::locale& loc)
{
    const std::messages<char>& facet = std::use_facet<std::messages<char> >(loc)
;
    std::messages<char>::catalog cat = facet.open("sed", std::cout.getloc());
    if(cat < 0 )
        std::cout << "Could not open german \"sed\" message catalog\n";
    else
        std::cout << "\"No match\" "
                  << facet.get(cat, 0, 0, "No match") << '\n'
                  << "\"Memory exhausted\" " 
                  << facet.get(cat, 0, 0, "Memory exhausted") << '\n';
    facet.close(cat);
}
int main()
{
    std::locale loc("en_US.utf8");
    std::cout.imbue(loc);
 
    try_with(std::locale(loc, new std::messages_byname<char>("de_DE.utf8")));
    try_with(std::locale(loc, new std::messages_byname<char>("fr_FR.utf8")));
    try_with(std::locale(loc, new std::messages_byname<char>("ja_JP.utf8")));
}

Possible output: 

"No match" Keine Übereinstimmung
"Memory exhausted" Speicher erschöpft
"No match" Pas de concordance
"Memory exhausted" Mémoire épuisée
"No match" 照合しません
"Memory exhausted" メモリーが足りません

[编辑] 另请参阅
实现字符串消息目录的检索
Original:
implements retrieval of strings from message catalogs
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（类模板） [edit]

来自“http://zh.cppreference.com/mwiki/index.php?title=cpp/locale/messages_byname&oldid=28055”