1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
3 .\" This is free documentation; you can redistribute it and/or
4 .\" modify it under the terms of the GNU General Public License as
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8 .\" References consulted:
9 .\" GNU glibc-2 source code and manual
10 .\" Dinkumware C library reference http://www.dinkumware.com/
11 .\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
14 .TH ISWALPHA 3 1999-07-25 "GNU" "Linux Programmer's Manual"
16 iswalpha \- test for alphabetic wide character
19 .B #include <wctype.h>
21 .BI "int iswalpha(wint_t " wc );
26 function is the wide-character equivalent of the
29 It tests whether \fIwc\fP is a wide character
30 belonging to the wide-character class "alpha".
32 The wide-character class "alpha" is a subclass of the
33 wide-character class "alnum",
34 and therefore also a subclass of the wide-character class "graph" and
35 of the wide-character class "print".
37 Being a subclass of the wide-character class "print",
38 the wide-character class
39 "alpha" is disjoint from the wide-character class "cntrl".
41 Being a subclass of the wide-character class "graph",
42 the wide-character class "alpha" is disjoint from
43 the wide-character class "space" and its subclass "blank".
45 Being a subclass of the wide-character class "alnum",
46 the wide-character class "alpha" is disjoint from the
47 wide-character class "punct".
49 The wide-character class "alpha" is disjoint from the wide-character class
52 The wide-character class "alpha" contains the wide-character classes "upper"
55 The wide-character class "alpha" always contains at least the
56 letters \(aqA\(aq to \(aqZ\(aq and \(aqa\(aq to \(aqz\(aq.
60 function returns nonzero
61 if \fIwc\fP is a wide character
62 belonging to the wide-character class "alpha".
63 Otherwise it returns zero.