Section (3) iswalnum
iswalnum — test for alphanumeric wide character
iswalnum() function is
the wide-character equivalent of the isalnum(3) function. It
wc is a
wide character belonging to the wide-character class
The wide-character class alnum is a subclass of the wide-character class graph, and therefore also a subclass of the wide-character class print.
Being a subclass of the wide-character class print, the wide-character class alnum is disjoint from the wide-character class cntrl.
Being a subclass of the wide-character class graph, the wide-character class alnum is disjoint from the wide-character class space and its subclass blank.
The wide-character class alnum is disjoint from the wide-character class punct.
The wide-character class alnum is the union of the wide-character classes alpha and digit. As such, it also contains the wide-character class xdigit.
The wide-character class alnum always contains at least the letters _zsingle_quotesz_A_zsingle_quotesz_ to _zsingle_quotesz_Z_zsingle_quotesz_, _zsingle_quotesz_a_zsingle_quotesz_ to _zsingle_quotesz_z_zsingle_quotesz_ and the digits _zsingle_quotesz_0_zsingle_quotesz_ to _zsingle_quotesz_9_zsingle_quotesz_.
returns nonzero if
is a wide character belonging to the wide-character class
alnum. Otherwise, it returns zero.
For an explanation of the terms used in this section, see attributes(7).
||Thread safety||MT-Safe locale|
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