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std::basic_ios::narrow

性病：基本[医]监督办：：狭窄

char narrow( char_type c, char dfault ) const;​​

转换当前特定于区域设置的字符。c和它的标准相当。结果被转换为char_type到char如果需要的话。如果不能执行转换，则函数将返回dfault...

有效呼叫std::use_facet<std::ctype<char_type>>(getloc()).narrow(c, dfault...

参数

c-character to convert
dfault-character to return if the conversion was unsuccessful

返回值

字符转换为其标准等效字符，然后转换为char...dfault如果转换失败，则返回。

另见

widenwidens characters (public member function)
narrowinvokes do_narrow (public member function of std::ctype)
wctobnarrows a wide character to a single-byte narrow character, if possible (function)

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