Difference between revisions of "cpp/string/wide/towupper"
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Revision as of 14:19, 2 November 2012
| Defined in header <cwctype>
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| std::wint_t towupper( std::wint_t ch ); |
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Converts the given wide character to uppercase, if possible.
Contents |
Parameters
| ch | - | wide character to be converted |
Return value
Uppercase version of ch or unmodified ch if no uppercase version is listed in the current C locale.
Notes
Only 1:1 character mapping can be performed by this function, e.g. the uppercase form of 'ß' is (with some exceptions) the two-character string "SS", which cannot be obtained by std::towupper.
Example
The latin letter 'ſ' (U+017F) is the alternative lowercase form of 'S' (U+0053)
Run this code
#include <iostream> #include <cwctype> #include <clocale> int main() { wchar_t c = L'\u017f'; // Latin small letter Long S ('ſ') std::cout << std::hex << std::showbase; std::cout << "in the default locale, towupper(" << (std::wint_t)c << ") = " << std::towupper(c) << '\n'; std::setlocale(LC_ALL, "en_US.utf8"); std::cout << "in Unicode locale, towupper(" << (std::wint_t)c << ") = " << std::towupper(c) << '\n'; }
Output:
in the default locale, towupper(0x17f) = 0x17f in Unicode locale, towupper(0x17f) = 0x53
See also
| C documentation for towupper
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