Difference between revisions of "cpp/locale/tolower"
From cppreference.com
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| − | {{dsc inc | cpp/string/byte/ | + | {{dsc inc | cpp/string/byte/dsc tolower}} |
| − | {{dsc inc | cpp/string/wide/ | + | {{dsc inc | cpp/string/wide/dsc towlower}} |
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Revision as of 22:10, 31 May 2013
| Defined in header <locale>
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| template< class charT > charT tolower( charT ch, const locale& loc ); |
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Converts the character ch to lowercase if possible, using the conversion rules specified by the given locale's std::ctype facet.
Contents |
Parameters
| ch | - | character |
| loc | - | locale |
Return value
Returns the lowercase form of ch if one is listed in the locale, otherwise return ch unchanged.
Notes
Only 1:1 character mapping can be performed by this function, e.g. the Greek uppercase letter 'Σ' has two lowercase forms, depending on the position in a word: 'σ' and 'ς'. A call to std::tolower cannot be used to obtain the correct lowercase form in this case.
Possible implementation
template< class charT > charT tolower( charT ch, const std::locale& loc ) { return std::use_facet<std::ctype<charT>>(loc).tolower(ch); } |
Example
| This section is incomplete Reason: no example |
See also
| converts a character to uppercase using the ctype facet of a locale (function template) | |
| converts a character to lowercase (function) | |
| converts a wide character to lowercase (function) |
