iswalpha
if (iswalpha(c) || c == '_') {
} while (iswalpha(c) || iswdigit(c) || c == '_');
if (iswalpha(*tmpptr) || *tmpptr == '_') {
(Z=((unsigned)(c)), !quoted(Z)&&(iswalpha(Z)||((Z)=='_')\
(Z=((unsigned)(c)), !quoted(Z)&&(iswalpha(Z)||((Z)=='_')\
if (iswalpha(*tmpptr) || *tmpptr == '_') {
(wide ? iswalpha(x) : isalpha(x)))
if (iswalpha(c)) {
if(len > 1 && !iswalpha(wc)) {
extern int iswalpha(wint_t);
extern int iswalpha(wint_t);
using std::iswalpha;
using std::iswalpha;
assert(iswalpha(ch));
if ((p->g->cflags®_ICASE) && iswalpha(ch) && othercase(ch) != ch)