Standard C++ Library Reference ISO/IEC (VERSION3)

iswupper
int iswupper(wint_t c);
The function returns nonzero if c is any of:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or any other locale-specific uppercase character.
iswxdigit
int iswxdigit(wint_t c);
The function returns nonzero if c is any of
0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F
towctrans
wint_t towctrans(wint_t c, wctrans_t category);
The function returns the transformation of the character c, using the transform in the category
category. The value of category must have been returned by an earlier successful call to
wctrans.
towlower
wint_t towlower(wint_t c);
The function returns the corresponding lowercase letter if one exists and if iswupper(c);
otherwise, it returns c.
towupper
wint_t towupper(wint_t c);
The function returns the corresponding uppercase letter if one exists and if iswlower(c);
otherwise, it returns c.
wctrans
wctrans_t wctrans(const char *property);
The function determines a mapping from one set of wide-character codes to another. If the