411 REFERENCE · Wikibooks
Rebol Programming/ascii?
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
USAGE:
ASCII? value
DESCRIPTION:
Returns TRUE if value or string is in ASCII character range (below 128).
ASCII? is a function value.
ARGUMENTS
value -- (Type: string file email url tag issue char integer)
SOURCE CODE
ascii?: func [
{Returns TRUE if value or string is in ASCII character range (below 128).}
value [string! file! email! url! tag! issue! char! integer!] /local
ascii
][
ascii: make bitset! #{
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000000000000000000000000000
}
either any-string? value [parse/all/case value [any ascii]] [value < 128]
]