iswspace - test for whitespace wide character
int iswspace(wint_t wc);
The iswspace() function is the wide-character equivalent of the
isspace(3) function. It tests whether wc is a wide character
belonging to the wide-character class "space".
The wide-character class "space" is disjoint from the
wide-character class "graph" and therefore also disjoint from its
subclasses "alnum", "alpha", "upper",
"lower", "digit", "xdigit",
The wide-character class "space" contains the
wide-character class "blank".
The wide-character class "space" always contains at
least the space character and the control characters '\f', '\n', '\r', '\t',
The iswspace() function returns nonzero if wc is a wide character
belonging to the wide-character class "space". Otherwise, it returns
For an explanation of the terms used in this section, see attributes(7).
POSIX.1-2001, POSIX.1-2008, C99.
The behavior of iswspace() depends on the LC_CTYPE category of the
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