assert('a'.inCharSet!"a-z0-9"); assert('x'.inCharSet!"a-z0-9"); assert('z'.inCharSet!"a-z0-9"); assert('0'.inCharSet!"a-z0-9"); assert('5'.inCharSet!"a-z0-9"); assert('0'.inCharSet!"a-z0-9"); assert(!'\0'.inCharSet!"a-z0-9"); assert(!'A'.inCharSet!"a-z0-9"); assert(!'-'.inCharSet!"a-z0-9"); assert(!'a'.inCharSet!"^a-z0-9"); assert('#'.inCharSet!"^a-z0-9");
Check if character c belongs to the set specified by spec. See codepointSetFromStr for the syntax of spec.