set[procedure] set character-or-string ...
Scheme48: character set constructor.
- Other character set constructors: range, ranges,
ascii-range, ascii-ranges.
- Set operations on character sets: negate,
intersection, union, subtract
- Predefined character sets: lower-case, upper-case,
alphabetic, numeric, alphanumeric, punctuation,
graphic, printing, control, blank,
whitespace, hexdigit.
- Char-set can be used to construct a regexp. See match,
Concept:RegularExpression.
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