parser.rb in regexp-examples-0.3.2

- old
+ new

@@ -10,11 +10,13 @@
     def parse
       repeaters = []
       while @current_position < regexp_string.length
         group = parse_group(repeaters)
         break if group.is_a? MultiGroupEnd
-        repeaters = [] if group.is_a? OrGroup
+        if group.is_a? OrGroup
+          return [OneTimeRepeater.new(group)]
+        end
         @current_position += 1
         repeaters << parse_repeater(group)
       end
       repeaters
     end
@@ -63,11 +65,14 @@
       when rest_of_string =~ /\Ak<([^>]+)>/ # Named capture group
         @current_position += ($1.length + 2)
         group = parse_backreference_group($1)
       when BackslashCharMap.keys.include?(regexp_string[@current_position])
         group = CharGroup.new(
-          BackslashCharMap[regexp_string[@current_position]])
+          # Note: The `.dup` is important, as it prevents modifying the constant, in
+          # CharGroup#init_ranges (where the '-' is moved to the front)
+          BackslashCharMap[regexp_string[@current_position]].dup
+        )
       when rest_of_string =~ /\A(c|C-)(.)/ # Control character
         @current_position += $1.length
         group = parse_single_char_group( parse_control_character($2) )
       when rest_of_string =~ /\Ax(\h{1,2})/ # Escape sequence
         @current_position += $1.length
@@ -96,10 +101,9 @@
         else
           raise IllegalSyntaxError, "Anchors cannot be supported, as they are not regular"
         end
       else
         group = parse_single_char_group( regexp_string[@current_position] )
-        # TODO: What about cases like \A, \z, \Z ?
       end
       group
     end
 
     def parse_repeater(group)