template< class CharT >
CharT tolower( CharT ch, const locale& loc );
Converts the character ch to lowercase if possible, using the conversion rules specified by the given locale's std::ctype facet.
[edit] Parameters ch - character loc - locale [edit] Return valueReturns the lowercase form of ch if one is listed in the locale, otherwise return ch unchanged.
[edit] NotesOnly 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: 'Ï' and 'Ï'. A call to std::tolower cannot be used to obtain the correct lowercase form in this case.
[edit] Possible implementation [edit] ExamplePossible output:
in the default locale, tolower(0x190) = 0x190 in Unicode locale, tolower(0x190) = 0x25b[edit] See also
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