| Defined in header <cwctype> | ||
|---|---|---|
std::wint_t towupper( std::wint_t ch ); |
Converts the given wide character to uppercase, if possible.
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).
#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
| converts a wide character to lowercase (function) | |
| converts a character to uppercase using the ctype facet of a locale (function template) | |
| converts a character to uppercase (function) | |
C documentation for towupper | |
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