18.104.22.168 Character Set Predicates/Comparison
Use these procedures for testing whether an object is a character set,
or whether several character sets are equal or subsets of each other.
char-set-hash can be used for calculating a hash value, maybe for
usage in fast lookup procedures.
— Scheme Procedure: char-set? obj
— C Function: scm_char_set_p
#t if obj is a character set,
— Scheme Procedure: char-set= . char_sets
— C Function: scm_char_set_eq
#t if all given character sets are equal.
— Scheme Procedure: char-set<= . char_sets
— C Function: scm_char_set_leq
#t if every character set csi is a subset
of character set csi+1.
— Scheme Procedure: char-set-hash cs
— C Function: scm_char_set_hash
Compute a hash value for the character set cs. If
bound is given and non-zero, it restricts the
returned value to the range 0 ... bound - 1.