1ISWALPHA(3)                Linux Programmer's Manual               ISWALPHA(3)
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NAME

6       iswalpha - test for alphabetic wide character
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SYNOPSIS

9       #include <wctype.h>
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11       int iswalpha(wint_t wc);
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DESCRIPTION

14       The  iswalpha()  function is the wide-character equivalent of the isal‐
15       pha() function. It tests whether wc is a wide  character  belonging  to
16       the wide character class "alpha".
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18       The  wide  character  class "alpha" is a subclass of the wide character
19       class "alnum", and therefore also a  subclass  of  the  wide  character
20       class "graph" and of the wide character class "print".
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22       Being  a subclass of the wide character class "print", the wide charac‐
23       ter class "alpha" is disjoint from the wide character class "cntrl".
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25       Being a subclass of the wide character class "graph", the wide  charac‐
26       ter class "alpha" is disjoint from the wide character class "space" and
27       its subclass "blank".
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29       Being a subclass of the wide character class "alnum", the wide  charac‐
30       ter class "alpha" is disjoint from the wide character class "punct".
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32       The  wide  character  class "alpha" is disjoint from the wide character
33       class "digit".
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35       The wide character class "alpha" contains the  wide  character  classes
36       "upper" and "lower".
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38       The  wide  character class "alpha" always contains at least the letters
39       'A' to 'Z' and 'a' to 'z'.
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RETURN VALUE

42       The iswalpha() function returns non-zero if  wc  is  a  wide  character
43       belonging  to  the  wide  character class "alpha". Otherwise it returns
44       zero.
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CONFORMING TO

47       C99.
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SEE ALSO

50       isalpha(3), iswctype(3)
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NOTES

53       The behaviour of iswalpha() depends on the  LC_CTYPE  category  of  the
54       current locale.
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58GNU                               1999-07-25                       ISWALPHA(3)