/**
 * call-seq:
 *     rxp === str   => true or false
 *    
 * Case Equality---Synonym for <code>ORegexp#=~</code> used in case statements.
 *    
 *    a = "HELLO"
 *    case a
 *    when ORegexp.new('^[a-z]*$'); print "Lower case\n"
 *    when ORegexp.new('^[A-Z]*$'); print "Upper case\n"
 *    else;                         print "Mixed case\n"
 *    end
 *    
 * <em>produces:</em>
 *    
 *    Upper case      
 *
 **/
 
static VALUE oregexp_m_eqq(VALUE self, VALUE str) {