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17 | DESCRIPTION |
17 | DESCRIPTION |
18 | < |
18 | < |
19 | lookup. It is a predicate returning non-zero for alphabetic or |
19 | lookup. It is a predicate returning non-zero for alphabetic or |
20 | numeric ASCII characters, and <<0>> for other arguments. It is defined |
20 | numeric ASCII characters, and <<0>> for other arguments. It is defined |
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21 | for all integer values. |
21 | only if <[c]> is representable as an unsigned char or if <[c]> is EOF. |
22 | 22 | ||
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23 | You can use a compiled subroutine instead of the macro definition by |
23 | You can use a compiled subroutine instead of the macro definition by |